Description of the 4-20mA nitrogen gas mass flow meter:
4-20mA nitrogen gas mass flow meter are specially designed for small pipe flow monitoring and control. The series can measure gas flow in a pipe diameter as small as 3 mm,but not over 19 mm. With the self-flow conditioning feature of the MEMS sensor package, the 4-20mA nitrogen gas mass flow meter feature an extremely low pressure loss compared to the traditional by-pass thermal mass flow meters in this application scope. The accuracy of the 4-20mA nitrogen gas mass flow meter are generally ±(1.5+0.2FS)% or better depending on the requests. The 4-20mA nitrogen gas mass flow meter can work at an environment of -20 to 60 C and pressure up to 1.5 MPa. 

Features of the 4-20mA nitrogen gas mass flow meter:
·Highly sensitive,measuring as low as 8mm/sec,and as 65m/sec with a single assembly
·Directly sense mass flow using thermal mass flow principle
·Propriety MEMS sensor package design for better reliability
·Standard 12~24VDC power supply
·Low pressure loss forreducing energy cost
·Industrial standard Modbus protocol for easy networking and remote control

Specification of the 4-20mA nitrogen gas mass flow meter:
Accuracy: ±(1.5+0.5FS)%
Environment Temperature: -20 ~ +60 ºC
Humidity:<95 %RH (No icing or condensation)
Flow channel :3 ~ 19 mm
Display: Flowrate and accumulated flow
Interface:4 ~ 20 mA; RS485; Pulse
Calibration:Air @ 20 oC, 101.325 kPa
Protection: IP40 (Without Ex proof model); IP66 (With Ex proof model)
Ex Proof: Ex d IIC T4

Application of the 4-20mA nitrogen gas mass flow meter:
Applications include semiconductor gas process monitoring and control, hospital oxygen gas monitoring, etc.