PHM330 Differential Pressure Transmitter

● Thermal mass flow sensor, high sensitivity to low differential pressure and low airflow.
● Excellent long-term stability without zero drift
● 1 bar pressure resistance, measuring range : ±50 ... ±1500 pa
● Switch output signal and range by DIP switch
● Physical quantity unit switching (through UI): mbar / Pa / hPa / kPa / mmH₂O / mmWS / inH₂O / mmHg
● Square root function, Modbus RS-485

The eyc-tech PHM330 differential pressure transmitter is designed on thermal mass flow sensor, which is excellent on measuring very low differential pressure, and has great zero point stability and high pressure resistance. PHM330 allows a very small amount of gas flow through its sensing part, then converts flow measurement signal to differential pressure measurement signal via the integrated circuit.

Exhaust emission / Environmental engineering / Monitor differential pressure and environment air flow / Water treatment / Air conditioning box flow

Input
Sensor type : Thermal mass flow sensor
Measuring range : ±50 ... ±1500 pa

Output
Output : 4 ... 20 mA / 0 ... 10 V
Signal connection : 3-wire
Modbus : RS-485
Load resistance : Voltage output : ≧ 10 KΩ
                            Current output : ≦500 Ω
Response time(t63) : 3 ms
Display type : LCD Module with back light, double line character
Digit height : 5.56 mm

Accuracy
Accuracy : ±1.5% F.S. ±3% M.V.
Temperature influence : 1% m.v. per 10°C

Environment
Measuring medium : Air
Operating temperature : -20 ... +80°C (Non-display) / 0 ... +50°C (Display)
Operating humidity : 0 ... 95%RH (Non-condensing)
Storage temperature : -40 ... +80°C

Electrical
Power supply : DC 24 V ± 10 % or AC 24 V ± 10 %
Current consumption : DC 24 V : ≦45 mA(Display) / ≦40 mA(Non-display)
                                     AC 24 V : ≦95 mA(Display) / ≦90 mA(Non-display)
Overvoltage protection : ≦DC 40 V
Electrical connection : M12 connector

Installation
Installation : Wall

Protection
IP rating : IP65
Electrical protection : ■ Polarity protection ■ Over-voltage ■ Short circuit
Pressure resistance : 1 bar
Burst pressure : 3 bar

Certification
Certification : CE

Material
Housing : Aluminum alloy
Weight : Display : 497 g / Non-display : 478 g