Small Gas Mass Flow Meter, Air/O2/N2, 0-2/5/50L/min

Small Gas Mass Flow Meter, Air/O2/N2, 0-2/5/50L/min

Small gas mass flow meter is characterized with compact size, high accuracy and good repeatability, designed for low gas flow rate (0-2/ 5/ 50L/min) in the gas lines of 3mm and 8mm in diameter, easy for installation with BST1/4 (R1/4) connection, LED display instantaneous flow rate and flow accumulation, suitable for wide applications involving compressor air, O2, N2, etc.

SKU: CCHN-FLOW-MF4000

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Delivery date: 6-25 days

Overview

Compact andlight gas mass flow meters are designed for low gas flow rate measurement in the gas pipelines of 3mm and 8mm in diameter, and have flow rate range of 0~2, 5 L/min and 0~20, 50 L/min available with BST1/4 (R1/4) connection. Featuring high sensitivity and fast response time, the gas flow meters are suitable for process gas control, environmental sampling and many other industrial applications.

Specification

Model	CCHN-MF4003	CCHN-MF4008
Flow Range *	0~2, 5 L/min	0~20, 50 L/min
DN	3mm	8mm
Gas *	Air, N2O, CO2, O2, N2, Ar. For other gases, please contact us.
Turn-down Ratio	100:1
Accuracy	±(1.5+0.2)% FS
Repeatibility	0.25%
Zero Drift	±30mV
Output Drift	±0.12%/°C
Response Time	10ms (default, 20, 50, 100, 200, 500, 1000 settable)
Power Supply	8-24V DC, 50mA
Signal Output *	Linear: Analog 1-5V DC (Standard); RS232, RS485 (Optional)
Display	4-digit 7-segment LED, 2 LED indicator
Display Unit	Instantaneous flow rate: SLPM, Flow accumulation: SL
Display Resolution	0.001, 0.01, 0.1 L/min settable	0.01, 0.1 L/min settable
Working Pressure	≤0.5MPa
Pressure Loss	≤100Pa	≤600Pa
Working Temperature	-10°C ~ +55°C
Storage Temperature	-20°C ~ +65°C
Humidity	<95%RH (no icing or condensation)
Keyboard	3 keys
Pin Out	5 Pins, NS-TECH CD R-5
Mechanical Connection	BSPT 1/4 (R1/4)
Calibration	Air @20°C, 101.325kPa
Weight	75g

Note: For N2O and CO2, CCHN-MF4003 is selectable with 2 L/min, without 5 L/min; CCHN-MF4008 is selectable with 20 L/min, without 50 L/min.

Dimension (unit: mm)

Gas mass flow meter dimension

Detail

Gas mass flow meter detail

Wiring Diagram Instruction

Gas mass flow meter wiring diagram instructions

Pinout	Thread Color	Definition
1	Blue	TX, RS232 digital signal transmission / RS485B
2	Green	Vout, analog voltage output positive
3	Red	VCC, power input positive (8 - 24 Vdc)
4	Black	GND, power/signal ground
5	Yellow	RX, RS232 digital signal receive / RS485A

Application

Gas mass flow meter application

Tips: Working principle of small gas mass flow meter

A mini gas mass flow meter calculates the mass flow rate of a gas by measuring the change in heat generated by the gas as it flows through the sensor. The sensor usually consists of two temperature probes, one located before the gas flows and the other after. As the gas flows, heat is transferred from the sensor to the gas, resulting in a change in temperature. Based on this change, the flow meter is able to derive the mass flow rate of the gas.

Small gas mass flow meters are widely used in industrial gas measurement, laboratory testing, medical equipment and environmental monitoring. They are particularly suitable for applications where precise gas quality control is required, such as gas pipeline monitoring, gas consumption monitoring and gas delivery systems.