DFRobot Gravity MEMS Gas Sensor (CO, Alcohol, NO2 & NH3) - I2C - MiCS-4514
DFRobot Gravity MEMS Gas Sensor (CO, Alcohol, NO2 & NH3) - I2C - MiCS-4514 - Image 2
DFRobot Gravity MEMS Gas Sensor (CO, Alcohol, NO2 & NH3) - I2C - MiCS-4514 - Image 3
DFRobot Gravity MEMS Gas Sensor (CO, Alcohol, NO2 & NH3) - I2C - MiCS-4514 - Image 4
SKU: SENS-3072
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DFRobot Gravity MEMS Gas Sensor (CO, Alcohol, NO2 & NH3) - I2C - MiCS-4514

₹5,379.00 (Inclusive of all taxes)
Out of Stock

The DFRobot Gravity MEMS Gas Sensor (MiCS-4514) is an I2C digital sensor module designed for detecting concentrations of CO, alcohol (C2H5OH), NO2, NH3, H2, and CH4. It operates on a wide 3.3V to 5.5V DC range, making it directly compatible with Arduino, Raspberry Pi, ESP32, and other 3.3V/5V logic microcontrollers.

Features

  • Multi-gas detection for CO, Alcohol (C2H5OH), NO2, NH3, H2, and CH4.
  • I2C digital interface with integrated gas concentration calculation formulas.
  • Wide operating voltage range of 3.3V to 5.5V DC for direct MCU compatibility.
  • Low power consumption of 0.45W at 5V for portable and embedded applications.
  • Extended operating temperature range from -30°C to 85°C.

Out of stock

Description

This sensor utilizes a MEMS (Micro-Electro-Mechanical Systems) metal oxide (MOX) sensing element from the MiCS-4514 series. The onboard signal conditioning circuit provides a stable, digital I2C output, simplifying integration and reducing noise compared to analog sensors. The module includes pre-loaded algorithms for converting sensor resistance readings into estimated gas concentrations in parts per million (ppm) for the target gases.

Designed for durability in varied environments, it operates across a broad temperature and humidity range. The compact PCB format includes mounting holes for secure installation in air quality monitors, safety equipment, and environmental sensing nodes.

Key Features

  • MEMS-based MiCS-4514 metal oxide sensor for robust multi-gas detection.
  • Integrated I2C digital interface eliminates analog signal conditioning complexity.
  • Onboard microcontroller pre-loaded with gas-specific concentration conversion formulas.
  • Wide 3.3V to 5.5V operating voltage ensures compatibility with most development platforms.
  • Low 0.45W power consumption suitable for battery-powered monitoring systems.
  • Extended environmental tolerance: -30°C to 85°C operating temperature, 5% to 95% RH.
  • Compact Gravity-series form factor with standard 4-pin connector for plug-and-play use.
  • High-value build offering laboratory-grade sensing principles in an accessible module.

Applications

  • Indoor air quality (IAQ) monitoring systems for CO and VOC levels.
  • Portable breathalyzer or alcohol detection prototypes.
  • Industrial safety equipment for NO2 and NH3 leak detection.
  • Smart home ventilation control based on multi-gas concentration.
  • Embedded environmental sensing nodes for agricultural or laboratory use.

Technical Specifications

Manufacturer Part NumberMiCS-4514
Operating Voltage3.3V to 5.5V DC
Power Consumption0.45W (at 5V)
Output InterfaceI2C Digital (0-3V logic)
Detection Gases & RangeCarbon Monoxide (CO): 1–1000 ppm
Nitrogen Dioxide (NO2): 0.05–10 ppm
Ethanol (C2H5OH): 10–500 ppm
Hydrogen (H2): 1–1000 ppm
Ammonia (NH3): 1–500 ppm
Methane (CH4): >1000 ppm
Operating Temperature-30°C to 85°C
Operating Humidity5% to 95% RH (non-condensing)
Storage Temperature-40°C to 85°C
Estimated Lifespan>2 years (in air)
PCB Dimensions (L x W)37 mm x 27 mm
Module Height6 mm
Mounting Hole SizeInner Diameter: 3.1 mm, Outer Diameter: 6 mm
Weight10 g

Frequently Asked Questions

What is the operating voltage range for this MEMS gas sensor?

The module operates on a wide voltage range from 3.3V to 5.5V DC. This allows direct connection to both 3.3V and 5V logic microcontrollers like Arduino Uno, ESP32, or Raspberry Pi without requiring a level shifter. Ensure your power supply can provide sufficient current for the sensor's 0.45W power dissipation.

How do I communicate with this sensor and read gas concentrations?

Communication is via the standard I2C protocol. Connect the module's SDA and SCL pins to your microcontroller's corresponding I2C pins, along with power and ground. Use the provided DFRobot library which contains the necessary functions to initialize the sensor and read the pre-calculated gas concentration values for CO, alcohol, NO2, NH3, H2, and CH4 directly over I2C.

What gases can this sensor detect and what are its measurement ranges?

This MiCS-4514 based sensor detects multiple gases: Carbon Monoxide (CO) from 1-1000 ppm, Nitrogen Dioxide (NO2) from 0.05-10 ppm, Ethanol/Alcohol (C2H5OH) from 10-500 ppm, Hydrogen (H2) from 1-1000 ppm, Ammonia (NH3) from 1-500 ppm, and Methane (CH4) above 1000 ppm. The onboard processor converts the sensor signal into these estimated concentration values.

Is this sensor suitable for outdoor or industrial environments?

Yes, its robust specifications support demanding applications. It has an extended operating temperature range from -30°C to 85°C and can function in 5% to 95% relative humidity (non-condensing). The MEMS sensor element is housed on a PCB with mounting holes for secure installation in enclosures for outdoor air quality stations, industrial safety monitors, or HVAC systems.

Package Includes

  • 1 x DFRobot Gravity: MEMS Gas Sensor (MiCS-4514)
  • 1 x Gravity 4-pin I2C Cable

Additional Information

Weight 0.01 kg
Dimensions 3.7 × 2.7 × 0.6 cm

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