Humidity and Temp Indicator Transmitter and Logger

Product Details:

Model Wise Description:

AHU-948 : Micro controller based PID / On-OFF Temperature & %Rh controller. Two input and two PID/On-OFF control outputs with alarms.

Description:
Libratherm offers PID controller model AHU-948 for controlling temperature (T) and relative humidity (Rh) for the AHU and other similar HVAC applications. For the proper functioning of the Air Handling unit, it is required to monitor the T and Rh of the Air being delivered to the room or the hall. The T and Rh values are to be compared with the desired set values and based on the error between the process values and set values the operation of the hot/cold water 2 way or 3 way valves/damper Actuators, heaters, are controlled to maintain the T and Rh in the Air flow processed by the AHU systems.

This model AHU-948 accepts inputs from standard T + RH sensor or transmitter (as given in the table below). The instrument simultaneously displays the temperature in the range 0.0 to 60.0oC and relative humidity in the range of 0.0 to 100.0% RH. The PID outputs are available for controlling temperature and %RH in the form of 4-20mA/(0-10)VDC and /or in the form of DC/logic pulses. Common or individual High and Low alarm output in the form of relay contacts for Temperature and humidity can be provided as per user’s requirement. To meet specific AHU control application, the 3 way valve can be operated by 4-20mA/(0-10VDC proportional PID in direct action to control the temperature and for controlling RH, the DC pulse output is available, which can be used to control AC or DC operated solenoid valves or to control the heating for evaporation of moisture using Libratherm make - single or three phase thyristor control. RS485 serial port is available for interfacing to DCS or PLC or BMS.
Resolution 0.1 Degree C for Temp. and 0.1 % for RH
Indicating Accuracy +/- 0.3 Degree C for Temp. and + / - 0.5% for RH. (Subject to accuracy of the sensor/transmitter used in the system)

Features:
Microcontroller based design.
Elegant appearance, easy to operate and compact in size.
Highly accurate and sturdy in operation.
User programmable settings
Dual display for simultaneous indication of T and RH.
Field proven Algorithm, tested successfully for various AHU / HVAC control applications.

Additional Information:

• Item Code: AHU-948
• Production Capacity: 50

Product Details:

Temperature / Humidity Transmitter With 4-20mA/RS-485 /Ethernet Interface (Model HTX-3000)

Model Wise Description:


Description:

Libratherm offers micro-controller based (T + Rh) Transmitter model HTX-3000 with digital display, 4-20mA output, RS 485 or Ethernet interface as per the requirement.

This model find its application in Green House, Cold Storage rooms, Server rooms, Sterilizers, Pharmaceutical and Food product storage or manufacturing  plants and all such similar areas where the measurement is important and critical and required to be strictly monitored at the desired levels. For sensing (T + Rh) in vacuum system, specially designed suitable sensor assemblies are also available.

Features:

• Microcontroller based design.
• Elegant appearance, easy to operate and compact in size.
• Highly accurate and sturdy in operation.
• Dual display for simultaneous indication of T and RH.
• Field proven Algorithm, tested successfully for various HVAC control applications.

Additional Information:

• Item Code: HTX-3000-W
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai

Product Details:

Description:
Libratherm offers micro-controller based (T + Rh) monitoring system, model HTX-3001 with digital display, High and Low alarm relays, 4-20mA output, RS 485 and Ethernet outputs as per the requirement. Even SMS alert can be sent to 5 different users using GSM interface. User can store the desired 5 cell numbers in the SIM card where SMS are to be received. For Email alert, the desired 5 email IDs are to be specified by the user and will be factory programmed into the built-in memory of HTX-3001. For email alert facility, user must ensure to use the SIM card with data enabled facility from the service provider.

This model find its application in Green House, Storage rooms, Server room, data centers, Sterilizers, Pharmaceutical and Food product storage or manufacturing plants, Cold chain vehicles and all such similar areas where the measurement is important and critical and required to be strictly maintained at the desired levels. For sensing (T + Rh) in vacuum system, specially designed suitable sensor assemblies are also available.

Features:

• Microcontroller based design.
• Elegant appearance, easy to operate and compact in size.
• Highly accurate and sturdy in operation.
• Dual display for simultaneous indication of T and RH.
• Relays, 4-20mA, RS485 and Ethernet, GSM interface.
• Easy to mount and install.

Format of SMS/Email Alert:

• LIBRATHERM HTX-3001
• STATUS OF (T+RH)
• T(Actual)=020.0oC
• T(Set Hi)=025.0oC
• T(Set Lo)=015.0oC
• T(Status)=OK
• Rh(Actual)=050.0%
• Rh(Set Hi)=045.0%
• Rh(Set Lo)=035.0%
• Rh(Status)=Hi

Additional Information:

• Item Code: HTX-3001
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai

Product Details:

Model Wise Description:

Model : HTX-3000-BIS   
Product Description : T + RH Indicator/Transmitter with Built in T +RH sensor – Wall mounting

Description:
Libratherm offers micro-controller based (T + Rh) sensor cum Transmitter model HTX-3000-BIS
This model finds its application in Green House, Storage rooms, Server rooms, Data centers, Sterilizers, Pharmaceutical Clean rooms, Textile and Food product storage or manufacturing plants and all such similar areas where measurement of T and Rh is important and critical and required to be strictly monitored.         4-20mA proportional to both T and Rh are available.

Features:

• Microcontroller based design.
• Elegant appearance, easy to operate and compact in size.
• Highly accurate and sturdy in operation.
• Dual display for simultaneous indication of T and RH.

Additional Information:

• Item Code: HTX-3000-BIS
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai

Product Details:

Libratherm offers T RH sensor with Transmitter model HYGROTX-3000 for measuring and transmitting the analogue values proportional to both T and RH Input.

The signal generated by Hygroclip is of the order of 1 volt DC and cannot be transmitted over very long distance and if done so the signal is likely to drop over very long cable which will result in the inaccurate measurement of temperature and %RH. The transmitter featured here converts the low-level signal to equivalent 4-20mA, which can be transmitted over a long distance without loss of accuracy in the measurement. Dual output of 4-20mA proportional to T and %RH can be used for remote measurement and indication. To suit industrial requirement more advanced transmitters model HTX-3000 are also available with the local display. To facilitate interface with PLC or DCS or with any other process controller – digital serial communication on RS485 bus with MODBUS RTU protocol in slave the mode is also provided.

Additional Information:

• Item Code: HYGROTX-3000

Product Details:

Libratherm Instruments Private Limited - Offering Clean Room Monitor & Real-Time Data Logger.

Features:

Microcontroller based design.

Elegant appearance, easy to operate and compact in size.

Highly accurate and sturdy in operation.

Three color 1” display for simultaneous indication of T, Rh and DP.

Ready for both analog and digital data transmission.

Built-in memory and RTC for real-time data storage.

Stainless Steel (SS) enclosure.

Product Details:

Model Wise Description:



Description:
Libratherm offers micro-controller based only Temperature, only Relative Humidity and both T + RH Transmitter models as specified above in flame proof field mount enclosure, for measuring and indicating Temperature and Relative Humidity in the field or in the process. The measured values are converted to the equivalent analogue and digital values proportional to the Process Input for long distance transmission and to interface to the PLC or DCS or any other field device. FTX-3000 is a very useful device to capture the low level signal from the hazardous area and bringing back the signal to the main control room.

Temperature and Relative Humidity values corresponding to the input is indicated on the digital display and the corresponding display range is converted to the 2 wire current or voltage output of 4-20mA/0-10VDC proportional and linearized to the selected process input. This linearized signal can be used for remote measurement and indication. For the dual input models, two independent 4-20mA/0-10V signals are available. The analog outputs are isolated from the DC power supply.
To interface low level field signals with PLC or DCS or with any other process controller – the measured and displayed analog values are converted for digital serial communication on isolated RS485 bus with MODBUS RTU protocol in slave mode.

Advantage of RS485 interface: Providing the feature of RS 485 digital serial interface is advantageous, since the number of wires coming from the various sensors / transmitters can be avoided and instead, only two wires can be used to interface multiple such FTX-3000 on serial port. The digital communication has the greatest advantage of exactly replicating the process value, that is what is measured at the plant and what is displayed in the control room always matches one to one as compared to transmitting the analogue values. In today’s technology, most of the PLCs and DCS accepts RS485 digital interface.

Features:

• Microcontroller based design.
• Single or Dual Temperature / RH input .
• Isolated single or dual 4-20mA output, proportional and linearized to the selected input.
• RS-485 MODBUS RTU serial interface.
• Bright red LED display.
• IP 65 Flameproof Enclosure – suitable for Gas group I, IIA and IIB.

Additional Information:

• Item Code: FTX-3000-TH
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai
• Production Capacity: 1

Product Details:

Model Wise Description:
Clean Room Indicator


Description:
Libratherm offers model THP-300X, micro-controller based (T + Rh + DP) Indicator cum Transmitter with 1” high digital display for long distance visibility and 4-20mA retransmission outputs for T, Rh and DP each. These instruments are specially designed for monitoring and real time data logging of clean room environmental conditions. Models are also available without data logging facility i.e. without real time clock and built in memory.

Digital interface such as RS-485 or Ethernet are integrated in the hardware to communicate with PC or PLC or HMI. All three types of indicators have built in memory and real time clock to store the T+RH+DP values at regular and programmable time interval. The stored data can be downloaded onto the computer via RS485 or LAN connection. Libratherm offers Window based PC software to monitor and store the data in continuous or batch format for on line or off line viewing and analysis in tabular or graphical format. The software allows user to prepare the batch report with desired fields such as product name, batch name, customer name etc. The THP series has built in flash memory to store real time 20000+ records.

Respective sensors for T, RH and DP are built-in to the same indicator or alternately provision for external sensor/transmitter is available.

The indicator is housed in an elegant SS enclosure with the depth of just 30mm and hence can be easily concealed inside the PUF panels of the clean rooms. The front facia has slanted borders to prevent dust accumulation. All input and output cable connections are accessible from top surface and DP connections are available through suitable nozzles on the bottom (As shown in the photographs).

Features:

• Microcontroller based design.
• Elegant appearance, easy to operate and compact in size.
• Highly accurate and sturdy in operation.
• Three colour 1” display for simultaneous indication of T, Rh and DP.
• Ready for both analog and digital data transmission.
• Built in memory and RTC for real time data storage.
• Stainless Steel (SS) enclosure.

Additional Information:

• Item Code: THP-300X
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai