Libratherm Instruments Private Limited

Libratherm offers high quality and low-cost microcontroller-based Temperature/Process Indicators. Model DPI-902-U accepts user selectable input from J, K type thermocouple or RTD (Pt-100) or (4-20)mA signal. The user can select one of the 4 different types of input using front panel keyboard. Whereas, Model DTI-902-F accepts user required any other fixed type of thermocouple, RTD or process input. The indicating accuracy of 1oC / 0.1 oC is achieved by software linearization technique. DTI-902 also offers 4-20mA retransmission output which is linearized and proportional to the selected input and the specified range and user have a facility to scale this output to the required temperature range. The indicator works on 110/230VAC or on the 12/24VDC power supply or vehicle battery.

Features:

• Latest and high-speed microcontroller based design
• Highly accurate and sturdy in operation.
• Elegant looks, Very easy to operate.

 

Libratherm offers various models of Digital Temperature and Process On/Off Controllers. User has the choice of selecting the model based on the type of input, type of analog or digital interface, and required size. All the models are designed to suit most of the Industrial Applications.

This Digital On/Off Safety Controller is available in the size of 48w x 96h x 75d mm, accepts input from J, K, thermocouple, Pt-100, 4-20mA, and provides 2 relay output or 2 SSR output along with retransmission of 4-20mA.

Key Features:

• Microcontroller based design.
• Software linearized for better measurement accuracy.
• Works on universal 90-240 VAC.
• Universal and User selectable input from process transmitters/temperature sensors.
• 1 to 2 Relay or SSR Output.
• Industrial standard Analog and Digital Interface.

Model Wise Description:


Description:

Libratherm 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.

The controller series DPC-903, DPI-912 and DPI-913 in 1/8DIN and 1/4DIN cut out sizes, offers both on-off and time proportional control logic and can be used for heating/cooling or any process control application with high/low configurable alarm relays. Linearized 4-20mA retransmission output is the added facility.

The PID controller series PID-903, PID-912 and PID-913 in 1/8DIN and 1/4DIN cut out sizes, offers both on-off and linear or switching PID control logic and can be used for heating or any process control application with high or low configurable alarm relays. Linear PID control output can be used to control heating power through external Thyristor power regulator or through linear proportional valves in direct or reverse action or same 4-20mA can be used as linearized retransmission output.

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