GFS131 flow range 0-300SLM air flow sensor ventilation analog output

$50.00 - $70.00
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1 Set
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Xi'an Gavin Electronic Technology Co., Ltd.

CN Manufacturer, Trading Company
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US$ 530,000+
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Port: China main port
Payment Terms: L/C,T/T,Western Union,MoneyGram,Paypal
Supply Ability: 10000.0 Set/Sets per Month GFS131 flow range 0-300SLM air flow sensor ventilation analog ou
Brand Name: GAIMC
Repeatability: ±0.5%F.S
Place of Origin: Shaanxi China
Working pressure: 100kPa
Flow Range: 20-300SLM
Response Time: 50ms
Working Voltage: 5.0v
Product Name: GFS131 flow range 0-300SLM air flow sensor ventilation analog output
Full Scale Output: 4.50v
Working Current: 25mA
Model Number: GFS131
Working Temp: -25~65℃
Packaging Detail: netural export package

GFS131 flow range 0-300SLM air flow sensor ventilation analog output



GFS131 flow sensor uses the thermodynamic principle to detect flow rate of the gas medium in the flow channel, with good precision and repeatability. Temperature sensors are built-in and every one product is calibrated for temperature compensation. At the same time, it has linear analog voltage output, convenient to use.

Detail show 

Main Applications :Intensive care ventilator / Portable ventilator


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1.Latest MEMS Sensor chip technology

2.High accuracy, quick response, good repeatability

3.Detection micro flow accurately

4.It is calibrated completely and temperature compensated



Model GFS131
Measuring Range 100, 150, 200, 300SLM
  Min Typical Max Unit
Full Scale Output 4.34 4.50 4.66 V
Zero Output 0.45 0.5 0.55 V
Output Impedance - 1000 - Ω
Working Voltage 4.95 5.0 14.0 V
Working Current - 25 - mA
Accuracy - ±2.5 ±4 %F.S
Repeatability - ±0.5 ±1 %F.S
Output Drift - 0.12 - %/℃
Signal noise - 10 - mV(Vrms)
Resistance - 120 - Pa/60SLM
Power consumption - 125 - mW/5V
Working pressure - - 100 kPa
Response Time - 50 - ms
Working Temp -25   65
Storage Temp. -40   90


1.The measuring range within 20-300SLM.
2.SLM means standard liter per minute. Standard-state: gas temperature is 0℃ and pressure is 101.325 kPa. The testing environment is room temperature and clear air.
3.The response time could be customized for 15-1000ms.
4.The temperature compensation is for the tem. range of 0-50℃ and the compensation performance can’t be ensured beyond the temperature range. 

Pins Definition


pin Function
1(black or gray) GND
2(red) VCC
3(yellow) OUT

Calculation for Airflow

Actual flow=full scale * (sensor actual output voltage-zero output voltage) / (full scale output voltage-zero output voltage) For example: the sensor full scale is 200 SLM, the sensor zero output voltage is 0.5V and full scale output voltage is 4.5V, and the actual output is 3.5V. Then the actual flow=200 SLM * (3.5V – 0.5V)/(4.5V- 0.5V) = 150SLM   


1. The air inlet and air outlet of the sensor need to be equipped with long straight pipe to ensure the product’s performance. It is recommended to leave a straight pipe for the inlet with 10 times longer than the pipe diameter while the outlet will be 5 times longer.

2. If measured gas medium contains dirt, the sensor’s lifespan will be shortened. We suggest users equip the sensor flow inlet with 5 micrometer precise filter.

3. The sensitivity of the product will reduce or be damaged if it contacts to water.

4. The wrong connecting of power supply will damage the internal circuit.


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