Target: Mass gas flow measurement in the flow channel
Model: F1031
Detection principle: Principles of thermodynamics

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F1031 micro flow sensor adopts thermodynamic principle to detect the gas flow, and it has high accuracy and good repeatability. The built-in temperature sensor makes the product has the function of professional temperature compensation calibration. At the same time, the output is linear analog voltage which is convenient to use.


Air samplers/gas analyzers/anesthetics/gas leak detectors/environmental air monitor/particle counters/Lighter fire automatic adjustment equipment/gas chromatography...

  • Industrial process control
  • Air and environment protection
  • Portable detector/meter


  • Latest MEMS Sensor chip technology
  • High accuracy, quick response, good repeatability
  • Detection micro flow accurately
  • It is calibrated completely and temperature compensated


Model F1031
Measuring Range① 50、100、150、200、300 SLM②
  Min Typical Max Unit
Full Scale Output 4.90 5.00 5.10 V
Zero Output 0.96 1.00 1.04 V
Output Impedance - 200 - Ω
Working Voltage 7.0 10.0 14.0 V
Working Current 15 25 30 mA
Accuracy - ±1.5 ±2.5 %F.S
Repeatability - ±0.3 ±0.5 %F.S
Annual Drift - ±0.1 ±0.5 %F.S
Pressure range - - 100 kPa
Response Time③ 55 50 55 ms
Working Temp.④ -25   65
Storage Temp. -40   90

①The measuring range within 50-300SLM is available and regular measuring ranges such as 50、100、150、200、300SLM.Customized fee will be charged for other ranges.
②SLM means standard liter per minute. Standard-state: gas temperature is 20℃ and pressure is 101.325 kPa.
③Customization of response time between 10ms and 1000ms. This response time refers to the electronic response time by the flow sensor for any mass flow change from 10% to 90%. which may be affected by the aerodynamic interface.
④The temperature compensation is for the temperature range of 0-50℃ and the compensation performance can’t be ensured beyond the temperature range.

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.