EST3135 Air Conditioning Pressure Transducers | HAVC/VRF

EST3135 line is specially designed for VRF air-conditioning system. The product features low power, bidirectional over voltage protection, high overload capacity, great electrical strength and salt-spray resistance that can meet the special demands of VRF.

Features

Pressure type: Gauge Pressure
Range:0~50bar
Accuracy: ±1.0%F.S, ±2.0%F.S
Customized working temperature: -35℃~105℃
Signal output: 0.5~2.5…4.5Vdc
Power supply: 5±0.25Vdc
Housing material: Brass
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

Applications

VRF Air-conditioning system

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.