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GAOTek Portable Gas Mass Flow Meter

This portable gas mass flow meter is designed for general-purpose mass flow sensing and control purposes.

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SKU: GAOTek-UMFM-111 Category:
Description

Description

Overview

This portable gas mass flow meter is designed for general-purpose mass flow sensing and control purposes. The wetted materials of the products are compatible with most of the common gases such as oxygen, nitrogen, air, argon, carbon dioxide, etc. GAO Tek also offers a wide spectrum of off-the-shelf and customized flow, pressure, temperature/humidity, and gas concentration sensing products and provides integration and turn-key solutions to the customers.

 

Features

  • The sensor chip adopts thermal mass flow measurement, without temperature and pressure compensation, which ensure the high precision of the flowmeter measurement.
  • It can also measure the minimal starting flow.
  • Multi-sensor integration on a single chip enables a range ratio of 80:1 or higher.
  • High stability, high accuracy and excellent repeatability at full range.
  • Support for the measurement of a variety of gases, allowing customers to perform field calibration for some special gases.
  • Fast response speed.
  • LCD field display or the output data can be queried by the host computer through the RS485 communication interface.
  • Parameters can be set by pressing buttons.
  • Portable design, battery power and external power supply can be arbitrarily switched.

 

Technical Specifications

Parameters Description Unit
Full-scale flow range 0~250 L/min
Accuracy ±(2.0+0.5FS) %
Repeatability 0.5 %
Turn-down ratio 80:1  
Response time <2.0 sec
Working temperature -10~55 °C
Maximum pressure 0.8 MPa
Humidity <95, no condensation %RH
Maximum overflow 400 L/min
Maximum flow change 60 L/min/sec
Pressure loss 2.0 kPa
Power supply 4-AA batteries (LR6) / 5~24 Vdc  
Power consumption >60 (on batteries) day
Power/data interface USB Type-C  
Digital output RS485 Modbus half-duplex  
Wireless options LoRa / WIFI / NB-IoT / BT LE  
Display LCD  
Resolution 0.01 L/min (instant) / 1 L (accumulated)  
Mechanical connection BSPP 1/2” or NPT/ 1/2”  
Storage temperature -20 ~ 70 °C
Reference conditions 20°C, 101.325 kPa, air  
Protection IP50  
Fluid compatibility Non-corrosive  
CE EN61326-1; -2; -3