Ceramic Capacitive Pressure Transmitter

EST3135 pressure transducers is specially developed for refrigerant pressure measurement. The selection of ceramic capacitive sensitive components and special calibration circuits can realize pressure measurement based on absolute vacuum or sealed gauge pressure.

The product can withstand large destructive pressure, and has the advantages of high accuracy at working temperature, high waterproof level, anti-condensation water, etc. It is an ideal choice for refrigerant pressure measurement.

Features & Benefits

Pressure type: Gauge Pressure
Range:0~15bar; 0-30bar; 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 -66

Applications

VRF Air-conditioning system
Multi-line air conditioning
Precision computer room air conditioning
Interrow refrigeration air conditioning
Air source heat pump

EST340 Technical Data & Performance

Measuring Range	0~15bar; 0~20bar; 0~30bar; 0~50bar;
Overload pressure	2 times of rated pressure
Burst Pressure	3 times of rated pressure

Accuracy	±1.5%F.S (include no-linearity, hysteresis, repeatability, and calibration error) Note 1
Total Error Accuracy	±2.5%F.S (include no-linearity, hysteresis, repeatability, and calibration error) Note 1
Long-term Stability.	±0.25％F.S/year
Response Time	(10%~90%)≤10ms
Medium Temperature	-35℃~120℃
Ambient Temperature	-35℃~105℃
Storage Temperature	-35℃~105℃
Output Signal	0.5~4.5 VDC (Ratio)
Supply Voltage	5±0.25VDC
Current without Load	≤ 10mA
Output Load	≥ 10KΩ
Overvoltage	≥ 10KΩ
Overvoltage	20VDC
Reverse Voltage	-14VDC
Insulate Resistance	≥100MΩ@500VDC
Dielectric Strength	1800VAC@1s or 1500VAC@1min (no spark, arc, no damage)
ESD	Contact ±8kV, air ±15kV
EMC	EN 61000-6-2，EN 61000-6-3
IP Rating	IP65-66
Random Vibration	10g，5~2000Hz
Shock	X/Y/Z, 20g, half-sine 11ms
Drop (any Axis)	1m
Pressure Connector	Φ6.35 straight copper tube
Shell Material	Straight copper interface + brass housing Note 2
Electrical Connection	Packard or Epoxy-encapsulated leads +XHP-3 connector
Seal Material	Neoprene
Applicable Refrigerant	R12，R21，R22，R31，R32，R134a，R404a，R407C，R410a， R502，R507