SKU: SENS-2989
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DFRobot Fermion MEMS Odor Gas Sensor (0.5–50 ppm) - Analog Output

₹599.00 (Inclusive of all taxes)
Out of Stock

The DFRobot Fermion MEMS Odor Gas Sensor is a compact analog-output module designed for qualitative detection of odor compounds like H2S, EtOH, and acetone (0.5–50 ppm). Operating from 3.3V to 5V DC, it is compatible with Arduino, Raspberry Pi, and other microcontroller platforms for air quality and odor monitoring applications.

Features

  • Advanced MEMS technology enables a compact 13x13x2.5mm footprint and low power consumption (<20mA).
  • Qualitative detection of multiple odor gases including Hydrogen Sulfide (H2S), Ethanol (EtOH), and acetone.
  • Analog voltage output for easy integration with ADC inputs on microcontrollers and data acquisition systems.
  • Fast response and recovery times with a typical lifespan of ≥5 years in standard air environments.
  • Wide operating range from -10°C to 60°C and 15-90% RH (non-condensing).

Out of stock

Description

The Fermion MEMS Odor Gas Sensor utilizes microelectromechanical system (MEMS) technology to provide a highly miniaturized and power-efficient solution for qualitative gas sensing. The sensor’s heated metal oxide (MOX) sensing element reacts to the presence of target odorants, producing a change in resistance that is output as an analog voltage signal proportional to gas concentration.

Designed for robustness in varied environments, the module requires a brief preheating period for stable operation and delivers rapid response to gas exposure. Its low thermal mass contributes to minimal heat generation and short stabilization times. The sensor is intended for qualitative trend analysis and presence detection rather than precise quantitative measurement, making it suitable for a range of monitoring and alerting applications.

Key Features

  • State-of-the-art MEMS fabrication for ultra-compact dimensions and reliable performance.
  • Low operating current (<20mA) enables deployment in battery-powered or energy-conscious systems.
  • High sensitivity to a spectrum of odor gases, with a defined sensitivity ratio R0/Rs ≥ 2 in 5ppm H2S.
  • Durable construction with a specified operational lifespan of five years or more in standard atmospheric conditions.
  • Simple analog voltage interface connects directly to microcontroller ADC pins for immediate prototyping.
  • Broad operating temperature and humidity range supports use in diverse indoor and controlled environments.
  • Supplied with pre-soldered 2.54mm pitch header pins for easy integration into breadboards and PCBs.

Applications

  • Indoor air quality monitors for detecting stale air, body odor, or volatile organic compounds (VOCs).
  • Food freshness and spoilage detection systems in refrigerators, pantries, or commercial food storage.
  • Breath analysis prototypes for qualitative screening applications in health and wellness devices.
  • Industrial safety leak detection for qualitative monitoring of hydrogen sulfide or solvent vapors in workshops.
  • Smart home and HVAC systems for triggering ventilation based on odor level thresholds.

Technical Specifications

Detection GasesH2S, EtOH, Acetone (Qualitative)
Detection Range0.5 – 50 ppm
Output SignalAnalog Voltage
Operating Voltage3.3V to 5V DC
Operating Current< 20 mA
Operating Temperature-10°C to 60°C
Operating Humidity15 – 90% RH (non-condensing)
Sensitivity (R0/Rs in 5ppm H2S)≥ 2
Lifespan≥ 5 years (in air)
Dimensions (L x W x H)13 mm x 13 mm x 2.5 mm
WeightApprox. 1 g

Frequently Asked Questions

What is the output signal of this MEMS odor sensor and how do I interface it?

The sensor provides an analog voltage output that varies with the concentration of detected odor gases. You should connect the output pin to an Analog-to-Digital Converter (ADC) input on your microcontroller (e.g., Arduino, Raspberry Pi with ADC hat). The reading will be a relative value indicating gas presence and trend, not an absolute ppm concentration.

What is the recommended operating voltage and current draw?

The module operates from a 3.3V to 5V DC power supply. Its operating current is typically less than 20mA. Ensure your power source can provide stable voltage within this range to guarantee proper sensor heater operation and stable analog signal output.

Does this sensor provide precise quantitative measurements?

No, this sensor is designed for qualitative detection and trend analysis. It indicates the relative presence and changes in concentration of target odor gases like H2S, ethanol, and acetone but does not output calibrated, absolute parts-per-million (ppm) values. It is ideal for alerting or control systems based on threshold changes.

Are there any specific environmental conditions or contaminants to avoid?

Yes, to ensure longevity and avoid sensor poisoning, avoid exposure to high concentrations of corrosive gases (H2S, SOx, Cl2, HCl), alkalis, alkali metal salts, and halogens. Also prevent contamination from volatile silicon compounds (found in some adhesives, sealants, and personal care products). Do not expose the sensor to condensation, water immersion, or freezing temperatures.

Is a preheating period required before use, and what is the sensor's lifespan?

Yes, a preheating period is required for the sensor's internal heater to stabilize and provide consistent readings. For best performance after extended storage, a 24-hour preheat is recommended. Under normal operating conditions in clean air, the sensor has a specified lifespan of 5 years or more.

Package Includes

  • 1 x DFRobot Fermion MEMS Odor Gas Sensor Module
  • 1 x 2.54mm Pitch Header Pin Strip

Additional Information

Weight 0.001 kg
Dimensions 1.3 × 1.3 × 0.25 cm