Fermion MEMS Gas Detection Sensor Hydrogen Sulfide (H2S)

Overview

The module is a MEMS-based electrochemical gas sensor system designed to detect Hydrogen Sulfide (H'S) gas.

• Target gas: H'S (Hydrogen Sulfide)

• Provides analog output proportional to gas concentration

• Designed for low-concentration toxic gas detection

It is optimized for safety monitoring and environmental sensing, especially for hazardous gas presence.

Working Principle

Electrochemical Gas Sensing (MEMS-Based)

The sensor operates using an electrochemical reaction mechanism:

1. Gas Diffusion

• H'S gas enters the sensor through a gas-permeable membrane

2. Electrochemical Reaction

• H'S reacts at the working electrode, generating electrons

3. Current Generation

• The reaction produces a current proportional to gas concentration

4. Signal Conversion

• Internal circuit converts current analog voltage output

Output is directly related to H'S concentration (ppm level).

Measurement Characteristics

• Detection range: typically 0100 ppm (H'S)

• Resolution: ppm-level sensitivity

• Response time (T90): typically < 30 seconds

Suitable for detecting toxic levels of H'S gas.

Electrical Characteristics

• Operating voltage: 3.3V to 5V

• Low power consumption

• Analog output inOutput

  • Voltage proportional to gas concentration

  • Requires:

    • ADC (microcontroller) for processing

     

   

  Signal Behavior

  • Clean air baseline voltage

  • Increasing H'S increasing output signal

   

  Internal Features

  MEMS Structure

  • Microfabricated sensor design

  • Compact and efficient

   

  Selective Detection

  • High sensitivity to H'S gas

  • Reduced interference from other gases

   

  Linear Response

  • Output approximately linear with gas concentration

  Temperature Compensation (basic)

  • Improves stability across environments

  Operating Behavior

  Warm-Up Time

  • Requires initial stabilization period

  itoring

  • Designed for real-time gas detection

  Sensitivity to Environment

  • Affected by:

    • Temperature

    • Humidity

    • Airflow

     

  Environmental Characteristics

  • Operates in typical indoor/outdoor environments

  • Requires:

    • Adequate airflow for accurate sensing

     

   

  Limitations

  • Cross-sensitivity possible with:

    • Other sulfur compounds

     

  • Requires:

    • Calibration for accurate ppm readings

     

  • Not suitable for:

    • Extremely high concentrations (beyond rated range)

     

  • Sensor lifetime limited due to electrochemical reaction

   

  Functional Role

  The module acts as a:

  • Toxic gas detector (H'i>og gas concentration sensor

  • Safety monitoring device

   

  Summary

  The Fermion MEMS H'S Gas Sensor is a precision electrochemical gas detection module that:

  • Detects Hydrogen Sulfide gas at ppm levels

  • Uses electrochemical MEMS sensing technology

  • Provides analog output proportional to gas concentration

  • Offers fast response and good selectivity

  • Is optimized for toxic gas monitoring and safety systems<