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# Gravity: MEMS Gas Sensor (CO, Alcohol, NO2 & NH3) - I2C - MiCS-4514

**Type:** Product page · **SKU:** SEN0377 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-mems-gas-sensor-co-alcohol-no2-nh3-i2c-mics-4514.html ([markdown](https://core-electronics.com.au/gravity-mems-gas-sensor-co-alcohol-no2-nh3-i2c-mics-4514.html.md))

This is a MEMS gas concentration sensor from DFRobot, supports the detection of various gas concentrations like CO, C2H5OH (Alcohol), H2, NO2, NH3...

## Pricing

- **Price:** $63.95 (inc GST) — $58.14 AUD, exc GST
- **Quantity discounts:** 6+ $55.23 (exc GST) · 12+ $52.90 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 450 more in 8–12 days.

## How to buy

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## Description

This is a 3.3/5V compatible MEMS gas concentration sensor from DFRobot.

This sensor supports the **detection of various gas concentrations** like CO, C2H5OH (Alcohol), H2, NO2, NH3, and integrates various gas concentration conversion formulas in the code to facilitate the testing and use of sensors.

With **I2C output and 3.3~5.5V wide voltage input**, it is compatible with [Arduino](https://core-electronics.com.au/arduino.html), [ESP32](https://www.dfrobot.com/product-2195.html), [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html) and other mainstream controllers.

![](https://core-electronics.com.au/media/wysiwyg/product_images/Board-Overview-SEN0377.jpg)

**Board Overview**

### Features

- Support detection of a variety of harmful gas
- Integrate the calculation formulas of various gas concentration
- Low power consumption
- I2C digital output
- Compatible with the 3.3~5.5V master controller

### Applications

- Gas leak detection
- Gas safety equipment
- Air environment detection

### Specification

- Detection of Physical Quantities: gas concentration of CO,C2H5OH(Alcohol), H2, NO2, NH3, CH4
- Operating Voltage: 3.3~5.5V DC
- Power Dissipation: 0.45W(5V)
- Output Signal: I2C (0~3V)
- Measuring Range: 
     1 – 1000ppm (Carbon monoxide CO) 
     0.05 – 10ppm (Nitrogen dioxide NO2) 
     10 – 500ppm (Ethanol C2H5OH) 
     1 – 1000ppm (Hydrogen H2) 
     1 – 500ppm (Ammonia NH3) 
     >1000ppm (Methane CH4)
- Working Temperature: -30~85°C
- Working Humidity: 5~95% RH(No condensation)
- Storage Temperature: -40~85°C
- Lifespan: >2 years (in the air)
- Circuit Board Size: 27mm\* 37mm
- Mounting Hole Size: inner diameter 3.1mm/ outer diameter 6mm

### Documents

- [Product wiki](https://wiki.dfrobot.com/_SKU_SEN0377_Gravity__MEMS_Gas_Sensor_CO__Alcohol__NO2___NH3___I2C___MiCS_4514)
- [MiCS-4514 Datasheet](https://core-electronics.com.au/attachments/localcontent/b5b08fe2ea631f0becdfa0c15db88c4a_37632d0cc83.pdf)
- [Schematics Diagram](https://core-electronics.com.au/attachments/localcontent/ec7dd3a55ba1d58fcbd5830ee08c0e7f_75447c8c050.pdf)
- [Dimension and Component Layout](https://core-electronics.com.au/attachments/localcontent/7ff4e494a339ab2c96220ad9e41582b1_82470f085f2.pdf)

### Parts List

- Gravity: MEMS CO, Alcohol, NO2 & NH3 Gas Sensor x1
- Gravity-4pin I2C Cable x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_3401.jpg)