SKU: SENS-2997
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DFRobot Fermion MEMS NH3 Ammonia Gas Sensor (1–300 ppm) - Analog Voltage Output

₹1,089.00 (Inclusive of all taxes)
Out of Stock

The DFRobot Fermion MEMS Ammonia (NH3) Gas Sensor is a compact breakout module designed for qualitative detection of ammonia concentrations from 1 to 300 ppm. It operates on a 3.3V to 5V DC supply with an analog voltage output, making it compatible with Arduino, Raspberry Pi, ESP32, and other microcontroller platforms for environmental monitoring applications.

Features

  • Qualitative MEMS ammonia (NH3) detection from 1 to 300 ppm
  • Compact 13 x 13 x 2.5 mm sensor footprint with low <20 mA power consumption
  • Analog voltage output for easy interfacing with 3.3V/5V ADCs
  • Fast response and recovery time with minimal preheating required
  • Designed for long-term use with a lifespan of ≥5 years in air

Out of stock

Description

This Fermion series sensor utilizes advanced Micro-Electro-Mechanical System (MEMS) technology to provide a highly miniaturized and power-efficient solution for ammonia gas sensing. The MEMS structure enables rapid thermal response, reducing preheating time and minimizing self-heating effects for stable operation.

The sensor outputs an analog voltage signal proportional to the detected gas concentration, allowing for straightforward integration into data acquisition systems. It is designed for operation in environments with temperatures ranging from -10°C to 60°C and relative humidity from 15% to 90% (non-condensing). The module includes pre-soldered 2.54mm pitch header pins for quick prototyping.

Key Features

  • MEMS-Based Sensing Element: Employs state-of-the-art micro-fabrication for compact size, low thermal mass, and consistent performance.
  • Low Power Operation: Consumes less than 20 mA, ideal for battery-powered or energy-conscious monitoring nodes.
  • Analog Voltage Interface: Provides a simple 0-Vcc output signal for direct connection to microcontroller ADC pins.
  • Robust Environmental Rating: Operates across a wide -10°C to 60°C temperature and 15-90% RH humidity range.
  • Extended Service Life: The sensing element is rated for a lifespan of 5 years or more under normal atmospheric conditions.
  • High-Value Build: Optimized performance-to-cost ratio for educational, prototyping, and light-duty monitoring applications.

Applications

  • Ammonia leak detection in refrigeration and cold storage facilities.
  • Water quality and risk monitoring in aquaculture and wastewater treatment.
  • Indoor air quality assessment for restroom odor or sanitation monitoring.
  • Educational and research projects involving environmental gas sensing.
  • Prototype development for portable air quality monitors and safety alarms.

Technical Specifications

KeyValue
Item TypeGas Sensor
Operating Voltage3.3V to 5V DC
Detecting Range1–300 ppm (NH3)
Detection GasAmmonia (NH3)
Max. Operating Current< 20 mA
Signal OutputAnalog Voltage
Operating Temperature-10°C to 60°C
Operating Humidity15–90% RH (non-condensing)
Life Cycle≥5 years (in air)
Sensitivity (R0/Rs)≥ 3 (in 50 ppm NH3)
Sensor Dimensions (L x W x H)13 mm x 13 mm x 2.5 mm

Frequently Asked Questions

What is the output signal of this ammonia sensor, and how do I connect it to an Arduino?

The sensor provides an analog voltage output. Connect VCC to 3.3V or 5V (matching your Arduino logic), GND to ground, and the analog output pin to any Arduino analog input (e.g., A0). The output voltage will vary with ammonia concentration, which your code can read using analogRead().

Can this sensor provide a precise, quantitative ppm reading for ammonia?

No, this MEMS sensor is designed for qualitative detection and trend monitoring of ammonia presence. The analog output indicates relative concentration changes but requires individual calibration against known gas concentrations for accurate quantitative measurement, which is not typically provided.

What are the critical environmental conditions for reliable sensor operation and longevity?

Operate within -10°C to 60°C and 15-90% non-condensing humidity. Avoid exposure to water, condensation, high concentrations of corrosive gases (H2S, Cl2), volatile silicon compounds, alkalis, and physical impacts. For best long-term stability, preheat for 24 hours after long storage periods.

What is the meaning of the sensitivity rating 'R0/Rs ≥ 3 in 50ppm NH3'?

This ratio indicates the sensor's responsiveness. R0 is the sensor's resistance in clean air. Rs is its resistance when exposed to 50 ppm of ammonia. A ratio ≥ 3 means the resistance changes significantly in the target gas, confirming good sensitivity for detecting ammonia at that concentration.

Package Includes

  • 1 x DFRobot Fermion MEMS Ammonia (NH3) Gas Detection Sensor (Breakout)
  • 1 x 2.54mm Pitch Header Pin Strip

Additional Information

Weight 0.001 kg
Dimensions 1.3 × 1.3 × 0.25 cm