Libratherm Instruments Private Limited
Libratherm Instruments Private Limited
Dahisar East, Mumbai, Maharashtra
GST No. 27AABCL1732A1Z5
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PID Controllers Single Loop and Multi Loops

Exporting and manufacturing microcontroller based controllers, precision microcontroller based controllers, microcontroller based indicators, PID temperature controllers and digital temperature controllers.

Supplying microprocessors, microcontroller based humidity controllers, temperature microprocessors controller, display temperature microprocessors controllers and digital microcontroller based humidity controllers.

PID Process Controller

PID Process Controller
  • PID Process Controller
  • PID Process Controller
  • PID Process Controller
  • PID Process Controller
  • PID Process Controller
  • PID Process Controller
  • PID Process Controller
  • PID Process Controller
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Approx. Price: Rs 4,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
BrandLibratherm
Model No.PID-480/DPC-480
Size48 x 48 mm
Control TypePID/On-Off
Input TypeThermocouple, RTD, Current (mA)
Control output TypeAnalog (mA/mV), Relay/SSR
Display Type4 Digit/7 Segment
Voltage90 to 250 VAC
Frequency50/60 Hz
DesignHigh speed 8 bit microcontroller based with 14 bit ADC
Temperature Sensor InputThermocouple type J,K,R,S,B,C,D
No. of InputsSingle
Temperature Range0.0 to 2000.0 Degree C
Resolution0.1 DegreeC

The Microprocessor based PID Temperature / Process Controller that we manufacture are 4 digits 0.5" Red 7-segment display for process variable and 4 digits 0.3” for Set Value. Its unique features include.
Input -U (Universal) J, K, type thermocouple, RTD(Pt-100)/3 wire, 4-20mA (User can select any of these 4 inputs) Input –F (Fixed) Any one factory set input as per user’s requirement – as per the input selection table given below. Range Full +ve range of the selected input (please refer to the range selection table) Resolution 1 oC for thermocouples and 0.1oC for Pt-100 For mA input the display resolution is subject to the required range. Indicating Accuracy +/- 1 oC for Thermocouple throughout the range and +/- 0.1oC for Pt-100 for (4-20)mA absolute to the linear input signal Display 4 digit 0.3" Red 7-segment display for process variable. 4 digit 0.3" Green 7-segment display for set value and PID parameters Output Indication Front Panel LED indications for SSR output. % Control Output and for Alarm status. Control Algorithm PID or ON/OFF selectable (when specified for switching output). Tuning Auto/Manual tuning of PID values. PID Values Proportional Band (P)= 0.0 to 100.0% of Span, Integral (I)= 0.00 to 5.00 resets/minute, Derivative (D) = 0.00 to 5.00miutes, Cycle Time = 2 to 100 seconds. Hysterisis = 0 to 50 counts, (Applicable for DPC-480) Soft start or Ramp time (rt) = 2 to 99 seconds Power Limit (PL) = 0 to 100%. Settings Using front panel feather touch (tactile) key board to set various parameters. Memory Backup Retention of PID and Set values in the built in non-volatile memory - in case of power failure and automatic re-execution of control on power resumption. Control Outputs (Switching) 2 SSR driver 0 to 10VDC pulse (OUT1 and OUT2) Control Outputs (Analog) Analog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms) (dual output is also available) Retransmission Output (Analog) 4-20mA, linearized and proportional to the selected input type and range. RL max = 250 Ohms. Alarm Outputs 2 Relay Outputs with programmable hysteresis- can be used as High or Low Alarms. Serial Communication (Optional ) Optically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable mod bus address) in lieu of OUT2
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PID Temperature Controller

PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
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Approx. Price: Rs 4,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Model No.PID-966
Control TypePID
Input TypeRTD, Current (mA), Thermocouple
Control output TypeRelay/SSR, Analog (mA/mV)
BrandLibratherm
Display Type4 Digit/7 Segment
Voltage90 to 250 VAC
Frequency50/60 Hz
EnclosureABS plastic with polycarbonate front.
Loop Supply24VDC @ 50 mA
Microcontroller based12bit ADC/DAC

Our range of Micro-controller based PID temperature and process controller is dual heat/cool output in the form of DC pulse with direction control for motorized valves.

Features:
  • High-speed microcontroller.
  • Single or Dual inputs.
  • Full range of the specified input type.
ParamtersDescription
Process Input (AI) 4-20mA or 0-10V
Display Range -2000 to +2000 or 0 to 4000 count with a programmable decimal point
Resolution 0.1,0.01,0.001
Temperature Input(AI) Thermocouple type – J, K, R, S, B
RTD type – (Pt-100)/ 2, 3 or 4 wire sensors
Temperature Range As shown in the Ordering Information table.
Resolution 1 °C for thermocouples and 0.1 °C for Pt-100.
Sampling rate / Display rate The input is read @40mS / the display is updated @1 second.
Indicating Accuracy +/- 1 °C for Thermocouple throughout the range and +/- 0.1 °C for Pt-100 for (4-20)mA or (0-10)V - absolute to the linear input signal.
Display 5 digit 0.5" Red 7-segment display for process variable.
5 digit 0.5" Green 7-segment display for set value and PID parameters
Settings Using Front panel feather touch key board to set various parameters like Set values, Hysterisis values, Span hi/lo values, MODBUS slave ID, Input selection, calibration, etc.
PID Values Prop. Band (P) = 0.0 to 100.0% of Span, Integral (I) = 0.00 to 5.00 resets/minute, Derivative (D) = 0.00 to 5.00 minutes, CYC= 2 to 30 secs
Control Action Analog and Switching PID algorithm
(Direct or Reverse action as required)
PID Control Output 1. SSR drivers
2. 4-20mA/0-5V/0-10V
Alarm Output 2 nos. of Relays for event or High/Low Alarms (Contacts are rated for 5A @ 230VAC).
Retransmission Output (AO) 4-20mA linearized and proportional to the selected input type and range. RL max = 300 Ohms.
Serial Output (SO) RS485 on MODBUS protocol with programmable slave ID
Supply (90VAC-250VAC), 50/60 Hz, 18 to 48VAC/DC (optional)
Size 96 x 96 x 120
Enclosure ABS plastic with polycarbonate front graphic.
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Single Loop Temperature Process Controller

Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
  • Single Loop Temperature Process Controller
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Approx. Price: Rs 5,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Model No.PID-480-U
Size48 x 48 mm
Control TypePID/On-Off
Input TypeThermocouple, Current (mA), RTD
Control output TypeAnalog (mA/mV), Relay/SSR
BrandLibratherm
Current5 A
Display Type4 Digit/7 Segment
Voltage90 to 250 VAC
Frequency50/60 Hz
MaterialABS plastic with polycarbonate front graphic.
Input UniversalJ,K,type thermocouple,RTD(Pt-100)/3 wire,4-20mA (User can select any of these 4 inputs)
SettingsUsing front panel feather touch (tactile) key board to set various parameters.
Memory BackupRetention of PID and Set values in the built in non-volatile memory - in case of power failure
Control Outputs Switching2 SSR driver 0 to 10VDC pulse (OUT1 and OUT2)
Control Outputs AnalogAnalog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms)
Retransmission Output Analog4-20mA,linearized and proportional to the selected input type and range. RL max = 250 Ohms.
Alarm Outputs2 Relay Outputs with programmable hysteresis- can be used as High or Low Alarms.
Serial Communication OptionalOptically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable mod bus add
Panel Cutout or Terminals45 x 45 mm. +/- 0.5 mm. - 16 back panel terminals
Input FixedAny one factory set input as per users requirement - as per the input selection table given below.
RangeFull +ve range of the selected input (please refer to the range selection table)
Resolution1 Deg C-thermocouples and 0.1 Deg C for Pt-100
Indicating Accuracy+/- 1 Deg C-Thermocouple throughout the range and +/- 0.1 Deg C for Pt-100 for (4-20)mA absolute
Display4 digit 0.3Inch Red 7-segment display for process variable. 4 digit 0.3Inch Green 7-segment display
Output IndicationFront Panel LED indications for SSR output. % Control Output and for Alarm status.
Control AlgorithmPID or ON/OFF selectable (when specified for switching output).
TuningAuto/Manual tuning of PID values

PID Temperature / Process Controller Single Loop (1/16 DIN)
Model Wise Description:
ModelDescription Size (mm.)
PID-480-UPID Controller (Universal Input)48 x 48 x 110
PID-480-FPID Controller (Fixed Input)48 x 48 x 110

Description:

Libratherm offers new PID controller, Model PID-480. This is designed and developed using the latest microcontroller chip and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. This model offer, all the useful features which are required to control the complex system.

This model accepts factory set single fixed input or the user selectable 4 universal inputs. The control action is user selectable as PID or On/Off for direct (Cool) or reverse(Heat) action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR. The analog PID control output level can also be configured for (0-20) mA or (4-20)mA or (0-5) volt using the front panel key board. Analog output can be used to control heating through thyristor or proportional valve. Additional analog output can also be provided as retransmission output proportional to the process input. Two electromechanical relays are available, which can be used as High and Low alarms.

In brief, PID-480 provides 2 switching SSR output and 2 analog outputs with 2 alarm output. Various combinations of outputs are possible to meet end application. Both Auto and manual tuning of PID values makes the controller versatile and user friendly. The model PID-480 being small in size, can easily be accommodated in small size equipments.

Libratherm also offers customized algorithm for special purpose applications, where user or OEM wants to have control and logic action to suit their application.

Features:
  • Microcontroller based design.
  • Single loop PID function.
  • One Ramp/Soak feature ( Optional -user programmable).
  • Available Control - logic (DC pulse) and one analog (12 bit resolution).
  • Auto/Manual tuning of PID parameters.
  • Field proven Algorithm tested successfully for various process control applications.
  • Auto/Manual bumpless transfer.
  • One programmable alarms and / or event relay outputs.
  • RS 485 serial interface - Optional

Applications:
  • Furnace / Oven Temperature control
  • Pressure control
  • Constant Temperature Bath
  • Laboratory equipment.
  • Plastic Injection, Blow moulding, Extruder machines
  • Material Testing equipments
  • Blister / Strip Packaging machines
  • Auto Clave, BOD incubators etc…
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Additional Information:

  • Item Code: PID-480-U_PID-480-F
  • Pay Mode Terms: T/T (Bank Transfer)
  • Port of Dispatch: Mumbai
  • Production Capacity: 1
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PID Temperature Controller

PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
  • PID Temperature Controller
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Approx. Price: Rs 6,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Model No.PID-966-U/PID-966-F
Size96 x 96 mm
Control TypePID/On-Off
Input TypeThermocouple, Voltage (mV), RTD, Current (mA)
Control output TypeAnalog (mA/mV)
TypeDigital
BrandLibratherm
Temperature RangeFull range of the selected input. (please refer to the range selection table)
Display Type4 Digit/7 Segment
Voltage90 to 250 VAC
Frequency50/60 Hz
Input UniversalRTD(Pt-100) and Thermocouple (type J,K,T) user selectable inputs using keyboard and DIP switch
PID ValuesProportional Band (P) = 0.0 to 100.0% of Span,Integral (I) = 0.00 to 5.00 resets/minute
SettingsUsing front panel feather touch (metal dome) key board to set various parameters.
Remote Set point OptionalExternal (4-20)mA input can be used to vary the set point in the range of manual mode.
Memory BackupRetention of PID and Set values in the built in non-volatile memory - in case of power failure
Control Outputs SwitchingSwitching Outputs - DC pulse (0 to 10VDC@25mA) for external SSRs. Relay or Triac (AC SSR)
Control Outputs AnalogAnalog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms)
Retransmission Output Analog4-20mA non-isolated,linearized and proportional to the selected input type and range.
Alarm Outputs2 + 2 extra Relay Outputs with programmable hysteresis- can be used as High or Low Alarms.
Serial Communication Optional ThirdOptically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable modbus addr
Loop Supply Optional FourthIsolated 18 to 24VDC @ 50 mA to power external two wire loop transmitter
Input FixedAny one factory set input as per users requirement. It is not possible to change the type of input
Panel Cutout or Terminals92 x 92 mm +/- 0.5 mm. (PID-966) - 26 back panel terminals
EnclosureABS plastic with polycarbonate front graphic.
Resolution1 DegC-thermocouple and 0.1 DegC for Pt-100,for V and mA inputs the display resolution is subject
Sampling rate or Display rateThe input is read @40mS / the display is updated @1 second. The control loop is also executed @40 mS
Indicating Accuracy+/- 1 oC for Thermocouple throughout the range and +/- 0.1oC for Pt-100 for (4-20)mA absolute
Display4 digit 0.5Inch Red 7-segment display for process variable . 4 digit 0.5Inch Green 7-segment display
Output IndicationFront Panel LED indications for Control Output,Alarms,Control and A/M status
Over Range IndicationIn the event of input sensor is open or the measuring range exceeds the calibration range,the OPEn
TuningAuto/Manual tuning of PID values.

Model Wise Description:

ModelDescription  Size (mm.)
PID-966-F PID Controller (Fixed Input)96 x 96 x 120
PID-966-U PID Controller (Universal Input)96 x 96 x 120

Description:

Libratherm offers new improved version of PID controllers, Model PID-966. It is designed and developed using the latest microcontroller chip and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. These model offers, all the useful features which are required to control the complex system.

These models accept factory set single or dual fixed input or user selectable  single universal input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac / AC SSR to operate AC operated load such as solenoid valve or electro mechanical relay. Linear analog outputs of 4-20mA/0-10VD/0-5VDC are also available and can be used for linear signal operated actuators or Thyristor power regulators.
 
Libratherm also offers customized algorithm for special purpose applications, where user or OEM wants to have control and logic action to suit their application.

Features:
  • Microcontroller based design.
  • Single loop PID function.
  • Available Control - Four logic (DC pulses) and Two analog (12 bit resolution).
  • Auto/Manual tuning of PID parameters.
  • Field proven Algorithm tested successfully for various process control applications.
  • Auto/Manual bump less transfer.
  • Two programmable alarms and / or event relay outputs.
  • Digital communication on  RS485 Modbus RTU protocol.

Applications:
  • Furnace / Oven Temperature control
  • Pressure control
  • Constant Temperature Bath
  • Cold storage and Chilling plants
  • Laboratory equipment.
  • Plastic Injection, Extruder machines
  • Material Testing equipment
  • Auto Clave, BOD incubators etc…
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Additional Information:

  • Item Code: PID-966-U
  • Pay Mode Terms: T/T (Bank Transfer)
  • Port of Dispatch: Mumbai
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Single Loop PID Temperature Controller

Single Loop PID Temperature Controller
  • Single Loop PID Temperature Controller
  • Single Loop PID Temperature Controller
  • Single Loop PID Temperature Controller
  • Single Loop PID Temperature Controller
  • Single Loop PID Temperature Controller
  • Single Loop PID Temperature Controller
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Approx. Price: Rs 7,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Model No.PID-485-F
Size48 x 48 mm
Control TypePID/On-Off
Input TypeRTD, Thermocouple, Current (mA)
Control output TypeAnalog (mA/mV), SSR
BrandLibratherm
Display Type4 Digit/7 Segment
Voltage90 to 250 VAC
Frequency50/60 Hz
Country of OriginMade in India
InputRTD(Pt-100),RTD(Pt-1000) (User to specify at the time of order)
Alarm OutputSingle Relay Output with programmable hysteresis- can be used as High or Low Alarms.
EnclosureABS plastic with polycarbonate front graphic.
Range0.00 to 150.00 Degree C
Indicating Accuracy+/-0.01 Degree C for Pt-100 / Pt-1000 sensors (software linearized)
Output IndicationFront Panel LED indications for SSR output,% Control Output and for Alarm status.
Memory BackupRetention of PID and Set values in the built in non-volatile memory - in case of power failure
Control Output AnalogAnalog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms) (12 bit resolution)
Serial Communication OptionalOptically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable modbus addr
Panel Cutout and Terminals45 x 45 mm. and +/- 0.5 mm. - 16 back panel terminals
NoteDue to continuous improvement - the specifications are subject to change without notice.
Resolution0.01 Degree C
Display5 digit 0.25Inch Red 7-segment display for PV. 5 digit 0.25Inch Green 7-segment display for SV
Control AlgorithmLinear 4-20mA or Time proportional PID or ON/OFF selectable
Control Output SwitchingFor external SSR,0 to 10VDC pulse (OUT1 )

Model Wise Description:

ModelDescription  Size (mm.)
PID-485-F PID Temperature Controller with 0.01oC control accuracy48 x 48 x 110

Description:

Libratherm offers new high accuracy PID controller, Model PID-485 for systems requiring very precise temperature control accuracy. This is designed and developed using the latest microcontroller chip and 16 bit ADC and programmed with the time tested and field proven PID algorithm. Normally standard PID controllers are available with 4 digit display, whereas this model is designed using 5 digit display for 0.01oC of resolution and control accuracy. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. This model offers all the useful features which are required to control very precisely the most complex system.
This model accepts factory set single fixed input of either Pt-100 or Pt-1000.  Control outputs are given in the form of optically isolated DC pulse to drive external SSR.

Features:
  • Microcontroller based design. 
  •  Single loop PID function.
  • 16 bit ADC for 0.01oC indicating /control accuracy
  • Field proven Algorithm tested successfully for various process control applications.
  • SSR control output
Applications:
  • Constant temperature oil bath.
  • Oven/Furnace control

Input: J,K, R,S, B type thermocouple, RTD(Pt-100), RTD(Pt-1000), 4-20mA

Range: Full range of the specified input.

(As given in the range selection table below).

Resolution: 0.1 Degree C for thermocouples and 0.01 Degree C for Pt-100 /Pt-1000. For mA input the display resolution is subject to the required range.

Indicating Accuracy: +/- 0.1 Degree C for thermocouples, +/-0.01 Degree C for Pt-100 / Pt-1000 sensors (software linearized) for (4-20)mA absolute to the linear input signal

Display: 5 digit 0.25" Red 7-segment display for process variable. 5 digit 0.25" Green 7-segment display for set value and PID parameters

Output Indication: Front Panel LED indications for SSR output, % Control Output and for Alarm status.

Control Algorithm: Linear or Time proportional PID or ON/OFF selectable

Tuning Auto/Manual tuning of PID values.

PID Values:  Proportional Band (P)= 0.0 to 100.0% of Span, Integral (I)= 0.00 to 5.00 resets/minute, Derivative (D) = 0.00 to 5.00miutes, Cycle Time = 2 to 100 seconds.

Hysterisis = 0 to 50 counts,

Soft start or Ramp time (rt) = 2 to 99 seconds

Power Limit (PL) = 1 to 100%.

Settings Using front panel feather touch (tactile) key board to set various

parameters.

Memory Backup: Retention of PID and Set values in the built in non-volatile memory - in

case of power failure and automatic re-execution of control on power resumption.

Control Outputs(Switching): For external SSR, 0 to 10VDC pulse (OUT1 )

Control Outputs (Analog): Analog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC

(RL min = 10KOhms) (12 bit resolution)

Retransmission Output (Analog): 4-20mA, linearized and proportional to the selected input type and range.

RL max = 250 Ohms. (12 bit resolution) - Optional

Alarm Output: Single Relay Output with programmable hysteresis- can be used as High

or Low Alarms.

Serial Communication(Optional): Optically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable mod bus address) in lieu of OUT2.

Panel Cutout / Terminals: 45 x 45 mm. +/- 0.5 mm. - 16 back panel terminals

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Additional Information:

  • Item Code: PID-485-F
  • Pay Mode Terms: T/T (Bank Transfer)
  • Port of Dispatch: Mumbai
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Single and Two Loops PID Temperature Controllers

Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
  • Single and Two Loops PID Temperature Controllers
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Approx. Price: Rs 7,500 / PieceGet Latest Price
Product Brochure

Product Details:

Minimum Order Quantity1 Piece
Model No.PID-723-U
Size72 x 72 mm
Control TypePID/On-Off
Input TypeVoltage (mV), Current (mA), Thermocouple, RTD
Control output TypeRelay/SSR
BrandLibratherm
Current5 A
Display Type4 Digit/7 Segment
Voltage90 to 250 VAC
Frequency50/60 Hz
Input UniversalRTD(Pt-100) and Thermocouple (type J,K,R,S,B),V and mA (ie Maximum 8 user selectable inputs
Output IndicationFront Panel LED indications for Control Output,Alarms,Control and A/M status
Control AlgorithmPID or ON/OFF selectable (when specified for switching output).
TuningAuto/Manual tuning of PID values.
PID ValuesProportional Band (P) = 0.0 to 100.0% of Span,Integral (I) = 0.00 to 5.00 resets/minute
SettingsUsing front panel feather touch (metal dome) key board to set various parameters.
Remote Set point Optional TwoExternal (4-20)mA input can be used to vary the set point in the range of manual mode. (PID-966)
Memory BackupRetention of PID and Set values in the built in non-volatile memory - in case of power failure
Control Outputs SwitchingSwitching Outputs - DC pulse (0 to 10VDC@25mA) for external SSRs. Relay or Triac (AC SSR)
Control Outputs AnalogAnalog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms)
Retransmission Output Analog4-20mA non-isolated,linearized and proportional to the selected input type and range.
Input FixedAny one factory set input as per users requirement. It is not possible to change the type of input
Alarm Outputs2 extra Relay Outputs with programmable hysteresis- can be used as High or Low Alarms.
Serial Communication Optional ThreeOptically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable modbus addr
Loop Supply Optional FourIsolated 18 to 24VDC @ 50 mA to power external two wire loop transmitter ( PID-966)
EnclosureABS plastic with polycarbonate front graphic.
NoteDue to continuous improvement - the specifications are subject to change without notice.
Input TwoTwo fixed inputs of similar types but factory set input as per users requirement.
RangeFull +ve range of the selected input (please refer to the range selection table)
Resolution1 oC for thermocouples and 0.1oC for Pt-100 for V and mA inputs the display resolution
Sampling rate or Display rateThe input is read @40mS / the display is updated @1 second. The control loop is also executed @ 40 m
Indicating Accuracy+/- 1 oC for Thermocouple throughout the range and +/- 0.1oC for Pt-100
One Ramp or Soak OptionalTo Gradually increase the process value Ramp rate : rt = 0.0 to 100.0oC/min or 0 to 100oC/min
Display One4 digit 0.3Inch Red 7-segment display for PV. 4 digit 0.3Inch Red 7-segment display for SV-(PID-723)

Model Wise Description:
ModelDescription  Size (mm.)
PID-723-U PID Controller (Universal Input)72 x 72 x 120
PID-966-U PID Controller (Universal Input)96 x 96 x 120
PID-948-U PID Controller (Universal Input)96 x 48 x 110
PID-489-U PID Controller (Universal Input)48 x 96 x 110
PID-723-F PID Controller (Fixed Input)72 x 72 x 120
PID-966-F PID Controller (Fixed Input)96 x 96 x 120
PID-948-F PID Controller (Fixed Input)96 x 48 x 110
PID-489-F PID Controller (Fixed Input)48 x 96 x 110 
PID-966-T PID Controller with (Two fixed input) 96 x 96 x 120 

Description:

Libratherm offers Four new models of PID controllers ,Model PID-723,PID-966,PID-948 and PID-489. These are designed and developed using the latest microcontroller chip and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. These model offers, all the useful features which are required to control the complex system.

These models accept factory set single or dual fixed input or the user selectable universal input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action . Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac or AC SSR to operate AC operated load, electro mechanical relay and/or  linear analog output.  The analog output levels can also be configured for (0-20)mA or (4-20)mA or  (0-5) / (0-10) volt  using the front panel key board, 

In brief, PID-723, PID-948 and PID-489 provides 4 switching outputs and 2 analog outputs whereas PID-966 provides 6 switching and two analog outputs. Both Auto and manual tuning of PID values makes the controller versatile and user friendly. The model PID-723,PID-948 and PID-489 being small in size, can easily be accommodated in small size equipments. One Ramp/Soak function allows user to gradually increase the set value and hold the process value for desired soak time.

Features:
  • Microcontroller based design.
  • Single loop PID function.
  • One Ramp/Soak feature (user programmable).
  • Available Control - Two logic (DC pulse) and Two analog (12 bit resolution).
  • Auto/Manual tuning of PID parameters.
  • Field proven Algorithm tested successfully for various process control applications.
  • Auto/Manual bump less transfer.
  • Two programmable alarms and / or event relay outputs.

Applications:
  • Furnace / Oven Temperature control
  • Pressure control
  • Constant Temperature Bath
  • Cold storage and Chilling plants
  • Laboratory equipment.
  • Plastic Injection, Extruder machines
  • Material Testing equipments
  • Auto Clave, BOD incubators etc…
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Additional Information:

  • Item Code: PID-723_PID-966_PID-948_PID-489
  • Pay Mode Terms: T/T (Bank Transfer)
  • Port of Dispatch: Mumbai
Yes! I am interested

Temperature And Process Indicator Controller

Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
  • Temperature And Process Indicator Controller
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Approx. Price: Rs 3,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Model No.DPI-912
Size96 x 48 mm
Control TypeProportional/On-Off
Input TypeCurrent (mA), RTD, Thermocouple
Control output TypeAnalog (mA/mV)
BrandLibratherm
Display Type4 Digit/7 Segment
Voltage110-230 VAC

Features:
  • Latest and high speed 8-bit microcontroller based design
  • 12-bit ADC and 12 bit DAC (4000 or +/-2000 counts)
  • Fixed or User selectable input type
  • 2 Relays or 2SSR driver and single 4-20mA analogue output
  • On-Off, Time Proportional or PID (Direct/Reverse) control action
  • Elegant looks and very user friendly operation.
  • Light weight and low depth of just 75 mm.
  • Operates on 12VDC/24VDC/230VAC / 90-240VAC
Applications:
  • Electrical heater control in Boiler, Hot Air generator, heat exchanger etc.…
  • Furnace and Oven control
  • Deep freezer, chiller compressor control
  • Any process control such as %Rh, Ph, ORP, Conductivity, Level etc.
  • with High/Low Alarms


Description
:

Libratherm  has contributed its 25 years of experience by designing these versatile series of microcontroller based Temperature/Process Indicators and controllers for general purpose Industrial usage.

These are developed and manufactured  to   suit  varied  industrial  temperature  and process indication and  control  applications where precise indicating and controlling accuracy.    

The Indicator series DPI-912 and DPI-902 offers Universal or fixed input of J, K or any other thermocouple, RTD(Pt-100) and 4-20mA linear signal. For temperature measurement 1oC/0.1oC Indicating accuracy is guaranteed using software linearization algorithm and with linearized retransmission output. Please see details specification sheet as given below.
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Additional Information:

  • Item Code: DPI-902_DPI-912
  • Pay Mode Terms: T/T (Bank Transfer)
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High Accuracy PID Temperature Controller

High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
  • High Accuracy PID Temperature Controller
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Approx. Price: Rs 9,500 / PieceGet Latest Price
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Product Details:

Minimum Order Quantity1 Piece
Model No.PID-967
Size96 x 96 mm
Control TypePID/On-Off
Input TypeRTD, Thermocouple, Current (mA), Voltage (mV)
Control output TypeRelay/SSR, Analog (mA/mV)
BrandLibratherm
Display Type4 Digit/7 Segment
Voltage110-230 VAC
Frequency50/60 Hz
Country of OriginMade in India
Alarm Outputs2 to 4 extra Relay Outputs with programmable hysteresis for High or Low Alarms.
Input UniversalSingle Analog Input -- RTD(Pt-100)/ 2 or 3 wire and Thermocouple (type J,K,R,S,T),0-10V and 4-20 mA
Serial CommunicationOptically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable modbus add
Supply230VAC +/- 20%,50/60 Hz.
Panel Cutout92 x 92 mm +/- 0.5 mm.
EnclosureABS plastic with polycarbonate front graphic.
RangeFull +ve range of the selected input (please refer to the range selection table given below)
Decimal PointProgrammable for voltage and current inputs.(1.0 0.1,0.01)
Resolution1oC /0.1oC for thermocouples and 0.1oC for Pt-100. For V and mA inputs the display resolution
Sampling rate or Display rateThe input is read @40mS / the display is updated @1 second. The control loop is also executed @40 mS
Indicating Accuracy+/- 1oC or +/-0.1oC for Thermocouple throughout the range and +/- 0.1oC for Pt-100
Burn Out DetectionIn the event of Input being open or short the analog output can be programmed to go up scale
One Ramp or SoakTo Gradually increase the process value Ramp rate rAmp = 0.0 to 100.0oC/min or 0 to 100oC/min
Item or MakeMicrocontroller based PID controller / 100% Indigenous Libratherm make and Made in India
Display5 digit 0.5Inch Red 7-segment display for PV . 5 digit 0.5Inch Green 7-segment display for SV
Output IndicationsFront Panel LED indications for Control Output,Alarms,Control and A/M status and serial interface
Control AlgorithmPID or ON/OFF selectable (when specified for switching output). Direct action (cool)
TuningAuto/Manual tuning of PID values.
PID ValuesProportional Band (P) = 0.0 to 100.0% of Span,Integral (I)= 0.00 to 5.00 resets/minute
SettingsUsing front panel feather touch (metal dome) key board to set various parameters.
Memory BackupRetention of PID and Set values in the built in non-volatile memory - in case of power failure
Control Outputs SwitchingSwitching Outputs - DC pulse (0 to 10VDC@25mA) for external SSRs and Relay or Triac (AC SSR)
Control Outputs AnalogAnalog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms)

Description of 5 digit PID Temperature Controller  PID-967:

Libratherm offers 5 digit PID controller model PID-967, which is designed and developed using the latest high speed 8 bit microcontroller chip incorporating 16 bit ADC and 12 bit DAC and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. This model offers all the useful features which are required to control the complex system.

PID-967 accepts universal single input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac or AC SSR to operate AC operated load, electro mechanical relay and/or  linear analog output of 4-20mA,0-5V or 0-10VDC to drive external thyristor based power regulators.

Features:

Microcontroller based design.

5 digit display with resolution of 0.1oC for high temperature measurement

User selectable input type T/C,RTD, 4-20mA, 0-10VDC

Single loop PID function.

One Ramp/Soak feature (user programmable).

Auto/Manual tuning of PID parameters.

Field proven Algorithm tested successfully for various process control applications.

RS485 digital interface for PC connectivity

Resolution  1 °C /0.1 °C for thermocouples and 0.1oC for Pt-100.
For V and mA inputs the display resolution is subject to the required range.
For V and mA input the position of the decimal point can be selected.
Indicating Accuracy+/- 1 °C or +/-0.1 °C for Thermocouple throughout the range and
+/- 0.1 °C for Pt-100
for (4-20)mA or (0-10)V - absolute to the linear input signal
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Additional Information:

  • Item Code: PID-967
  • Pay Mode Terms: T/T (Bank Transfer)
  • Port of Dispatch: Mumbai
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PID Controller Single Loop

PID Controller Single Loop
  • PID Controller Single Loop
  • PID Controller Single Loop
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Approx. Price: Rs 5,000 / UnitGet Latest Price
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Product Details:

Minimum Order Quantity1 Unit
BrandLibratherm
Output4-20 mA or 0-20 mA
Ramp1 to 20 programmable ramp
Control Signal0-5 volt

Libratherm offers new PID controller, Model PID-480. This is designed and developed using the latest microcontroller chip and programmed with the time-tested and field-proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady-state control. This model offer, all the useful features which are required to control the complex system.

This model accepts factory set single fixed input or the user selectable universal input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac or AC SSR to operate AC operated load, electromechanical relay and/or linear analog output. The analog output levels can also be configured for (0-20)mA or (4-20)mA or (0-5) volt using the front panel keyboard.

In brief, PID-480 provides 2 switching outputs and 2 analog outputs. Both Auto and manual tuning of PID values makes the controller versatile and user-friendly. The model PID-480 being small in size, can easily be accommodated in small size equipment. One Ramp/Soak function allows user to gradually increase the set value and hold the process value for desired soak time.

Libratherm also offers customized algorithm for special purpose applications, where user or OEM wants to have control and logic action to suit their application.
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Additional Information:

  • Item Code: PID-480
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Multi-Loops Temperature Controller

Multi-Loops Temperature Controller
  • Multi-Loops Temperature Controller
  • Multi-Loops Temperature Controller
  • Multi-Loops Temperature Controller
  • Multi-Loops Temperature Controller
  • Multi-Loops Temperature Controller
  • Multi-Loops Temperature Controller
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Approx. Price: Rs 25,000 / PieceGet Latest Price
Product Brochure

Product Details:

Minimum Order Quantity1 Piece
Model No.PID-8000-H-4
Control TypePID/On-Off
Input TypeCurrent (mA), Thermocouple, RTD
Control output TypeAnalog (mA/mV)
BrandLibratherm
Voltage110-230 VAC
Frequency50/60 Hz
Size192 x 96 x 200 mm
Number of Inputs4,6 or 8
Scan Rate1 to 99 sec (programmable through front panel keyboard).
Skip or HoldAvailable through key board in configuration mode.
Memory BackupRetention of PID and set values in the non volatile memory in the event of power failure.
Alarm Outputs2 Extra Relay outputs used for common High and Low Alarms
Digital InterfaceParallel Centronics printer output port for Printer interface and Serial
Panel Cutout188 x 92 mm +/-0.5 mm
Input typesJ,K,R,S,B,C,D,RTD(PT-100),RTD(PT-1000)/2 or 3 wire,(4-20)mA,(0-5)V etc.
Indicating AccuracyBetter than +/-0.1% of the specified range (Software Linearized)
Resolution0.1/1 Degree C Subject to the specified range
Display4 digit 0.5 Red 7-segment LED for actual temperature 4 digit 0.5 Red 7-segment LED for set temperatu
Open or Short Sensor IndicationDisplay shows FLt-1 or FLt-2 and outputs will be turned OFF.
TuningAuto/Manual tuning of PID values.
SettingsUsing front panel membrane key board to set the various values.

Model Wise Description:

ModelDescription     ( X = No. of loop )
PID-8000-H-44 loop PID Controller for heating control
PID-8000-H-66 loop PID Controller for heating control
PID-8000-H-88 loop PID Controller for heating control
PID-8000-HC-44 loop PID Controller for heating and cooling control
PID-8000-HC-66 loop PID Controller for heating and cooling control
PID-8000-HC-88 loop PID Controller for heating and cooling control

Description:
Libratherm offers Microprocessor based one to eight loop PID Temperature Controller (Model PID-8000) for processes requiring multiple zones heating or heating plus cooling control.  It is most suitable for difficult process, which results in frequent system disturbances, and applications where simultaneous and accurate temperature control of number of heating/cooling zone is required. It also eliminates the need for number of individual PID or ON/OFF Temperature Controllers thereby saves on cost. PID-8000 can accept 8 similar type of Thermocouples or RTD (Pt-100) inputs and can provide switching PID or ON/OFF Control output in the form of DC Pulses or SSR Drivers for heating and cooling. It can also simultaneously provide 8 analog PID control Outputs in the form of (4-20mA) or (0-5) volt, which can be used to drive external SCR Heater Power Controller or other actuators. Open or Faulty sensor indications for each zone is also displayed with the respective Zone No. Each zone loop parameters like PID, SET, Hysterisis, Power Limit and Ramp Time values can be independently programmed from the user-friendly front panel membrane keyboard.

The display scan rate is programmable from 1 to 99 seconds, whereas the internal control scanning is at the rate of 100mS. It also provides common High and Low alarm relay outputs, which can be used for external temperature dependent, inter locking or audio-visual alarms. In brief, PID-8000 is as good as 8 independent PID controllers in a single enclosure, with facility of different input per channel, different set point per channel and different output per channel – a unique feature. 

The serial interface of RS-485 in Modbus protocol is also optionally available for computer interface. The supporting window based software allows user to monitor behavior all the heating zones in both graphical and tabular form.

Features:
  • Microprocessor based design.
  • Elegant looks and Very easy to operate.
  • Accepts all types of maximum 8 inputs.
  • PID or ON / Off  heat and cool action per channel.
  • All zones are individually configurable for Heat or Cool.
  • Compact in size – ½ DIN (192 x 96 x 200 mm).
  • Versatile application and sturdy in operation.
  • Accuracy better than +/- 0.1 % of the full scale.
  • RS 485 / RS 232 Serial communication available.

Application:
  • Plastic extruders for pipes, sheets etc.
  • Plastic injection, for runner less moulding
  • Heat treatment using tunnel furnace
  • Large furnace and oven for homogeneous control
  • Environmental chambers
  • Multi zone furnace
  • Laboratory equipments etc…
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Additional Information:

  • Item Code: PID-8000-HC-8
  • Pay Mode Terms: T/T (Bank Transfer)
  • Port of Dispatch: Mumbai
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Kamlesh Panchal (Managing Director)
Libratherm Instruments Private Limited
No. 401-403, Diamond Industrial Estate, Ketki Pada Road
Dahisar East, Mumbai - 400068, Maharashtra, India


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