AWM700 Series Mass air flow sensors in Hydrogen fuel cells control, measuring the air going into fuel cells.

12SLPM, 20SLPM, 35SLPM, 50SLPM, 100SLPM, 150SLPM, 200SLPM, 300SLPM, 500SLPM

I2C or Analog output (1-5V)

1. Introduction
The S4000 mass airflow sensor series is fabricated using a micro-electromechanical system (MEMS) flow sensor chip. It is suitable for the measurement of clean and relatively dry gases for various purposes. It realizes the digitization, intelligence and high safety of the equipment, and has the innovation of traditional industries. Function and improvement; a wide range of flow ranges meet the flow measurement requirements of different equipment in the industry. High sensitivity, high reliability, high stability and low cost can promote the industry to develop energy-saving and intelligent. 

The S4000 series is based on a MEMS flow sensing unit, high-precision digital processing and calibration circuit (MCU), integrated high-resolution delta-sigma A/D converter and logic with internal calibration and MCU processor. The sensing signal is effectively collected in real time, and the accurate flow signal is obtained, and the corresponding compensation algorithm is processed internally, so that no external calibration compensation is required, and high-precision flow output can be ensured; the friendly digital output communication mode can be used by the user. It is very convenient to get the corresponding data information; the product application range is very broad.
 
2. Features
 Wide flow range 12SLPM-500SLPM 

 High precision (1.5% F.S accuracy) 

 Linear output and temperature compensation 

 Maintain long-term stability with minimal zero drift 

 Solid-state sensing core (no surface void or fragile membrane), anti-blocking and pressure shock 

 I2C or Analog output (1-5 V）

 Fast response time (20ms response time)
 
3. Application
 Ventilator 

 oxygen machine 

 Gas mask and respirator 

 Sprayer 

 Continuous positive airway pressure (CPAP) device 

 Anesthesia delivery 

 Leak detection 

 Spectrometer 

 Mass flow controller 

 Environmental climate control 

 Fuel cell control

4. Maximum rating

 Working temperature: -25 ° C to 85 ° C

 Storage temperature: -40 ° C to 90 ° C 

    Humidity: 0~100%RH*

  Impact resistant 100 g

 The sensor is resistant to condensation*

5. Specification

1. Customizable range between 10SLM and 500SLM

2. SLM: Standard liters per minute. Standard conditions: 0 ° C and 1 atmosphere

3. In addition, the two-way airflow test can be customized, and the analog output is  correspondingly changed. F(min)—F(max) corresponds to 1-5V output, and 0 flow  corresponds to 3V;

4. Includes temperature drift and linearity error

6. Linear Output

1. The unidirectional airflow mode: (calculation formula)
Flow = [(VOUT -1 V) / 4 V] × full scale flow
For example: S4103V has a full-scale flow of 200 SLM. When the output voltage is  read at 2.5V,
the instantaneous flow rate is [(2.5V-1V) / 4V × 200 SLM] = 75 SLM

2. Two-way airflow mode: (calculation formula)
Forward flow = [(VOUT -3 V)/2 V] × full scale flow
Reverse flow = [(3 V- VOUT)/2 V] × full scale flow

7. Shell Size
Note 1: The connector can be matched with a connecting line according to customer  requirements.