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.

Features

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

Model	EST3110	EST3110 B	EST3120

Data Sheet	Download	Download	Download
Range	0~5bar…50bar	0~5bar…50bar	0~5bar…50bar
Accuracy	±1.0%	±1.0%,±4.0%	±0.25%,±0.5%,±1.0%
Power Supply	10~30Vdc	12~30Vdc	10~30Vdc,5Vdc
Output	4~20mA,0.5~4.5V	4~20mA,0.5~4.5V	4~20mA,0.5~4.5V
Electrical Connection	Packard	M12X1/ GX12/16-7	DIN43650, IP65; GX 16-7
Pressure Connection	G1/4, NPT1/4, 7/16-20UNF	G1/4, NPT1/4, 7/16-20UNF	M20 x 1.5, G1/4, G1/2, NPT1/4, 7/16-20UNF
Ingression Protection	IP65	IP45/ IP65	IP45/ IP68

Model	EST3122	EST3135	EST3123

Data Sheet	Download	Download	Download
Range	0~5bar…50bar	0~5bar…50bar	0~5bar…50bar
Accuracy	±0.5%	±1.0%,±2.0%	±0.5%,±1.0%
Power Supply	10~30Vdc,5Vdc	5±0.25Vdc	5Vdc
Output	4~20mA,0.5~4.5V	0.5~2.5…4.5Vdc	0.5~2.5…4.5Vdc
Electrical Connection	Packard, DIN43650	Packard	Packard
Pressure Connection	7/16-20UNF, 9/16-20UNF	Cooper Pipe Connection	7/16-20UNF, 9/16-20UNF, M20 x 1.5, G1/4
Ingression Protection	IP65	IP65	IP65

Application

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

Technology

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.