EST3122 Heat Pump Pressure Transducers


EST3122 Pressure Transmitter for Water-Chilling/Heat-Pump

EST3122 line is anti-condensation pressure transmitter. The product is widely used in water-cooler screw chillers; water sourced heating pumps, and water-sourced heating pumps for measuring the pressure of refrigerant and cooling medium before and after the capability exchange of the controller according to the pressure control chiller operation.


  • Pressure type: Gauge Pressure
  • Range: 0~5bar…50bar
  • Accuracy: ±0.5%F.S
  • Customized working temperature: -35℃~105℃
  • Signal output: 4~20mA, 0.5~2.5…4.5Vdc
  • Power supply: 10~30Vdc, 5Vdc
  • Housing material: 304SS
  • Ingress Protection: IP65
  • OEM: Available
ModelEST3110EST3110 BEST3120
Data SheetDownloadDownloadDownload
Power Supply 10~30Vdc12~30Vdc10~30Vdc,5Vdc
Output 4~20mA,0.5~4.5V4~20mA,0.5~4.5V4~20mA,0.5~4.5V
Electrical ConnectionPackardM12X1/ GX12/16-7DIN43650, IP65; GX 16-7
Pressure ConnectionG1/4, NPT1/4, 7/16-20UNFG1/4, NPT1/4, 7/16-20UNFM20 x 1.5, G1/4, G1/2, NPT1/4, 7/16-20UNF
Ingression ProtectionIP65IP45/ IP65IP45/ IP68
Data SheetDownloadDownloadDownload
Power Supply 10~30Vdc,5Vdc5±0.25Vdc5Vdc
Output 4~20mA,0.5~4.5V0.5~2.5…4.5Vdc0.5~2.5…4.5Vdc
Electrical ConnectionPackard, DIN43650PackardPackard
Pressure Connection7/16-20UNF, 9/16-20UNFCooper Pipe Connection7/16-20UNF, 9/16-20UNF, M20 x 1.5, G1/4
Ingression ProtectionIP65IP65IP65


Water-cooler screw chillers | Water-sourced heating pumps | Over-flowed high temperature chillers


Piezoresistive based transducers rely on the piezoresistive effect which occurs when the electrical resistance of a material changes in response to applied mechanical strain. In metals, this effect is realized when the change in geometry with applied mechanical strain results in a small increase or decrease in the resistance of the metal. The piezoresistive effect in silicon is due primarily to changes at the atomic level and is approximately two orders of magnitude larger than in metals.

Sputter deposited thin film pressure sensor is a kind of Piezoresistive pressure sensors, difference exist that the thin-film sensor consists of a resistor pattern that is vaporized or sputter-deposited  onto the force-summing element (the measuring diaphragm). In some transducers the resistors are not directly mounted on the diaphragm but are on a beam linked to the diaphragm by a push rod.

Accuracy and range for EST 3 series

eastsensor accuracy map

eastsensor map map

EST3122 Heat Pump Pressure Transducers drawing 2

Click to download

  • General Instruction and Datasheet-EST3122 GID-3-EV01