DFRobot Gravity NH3 Sensor (Calibrated) – I2C & UART


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SKU: 1356255
  1. Brand: DFRobot
  2. Product: Gravity NH3 Sensor (Calibrated) – I2C & UART
  3. Detection Gas: Ammonia (NH3)
  4. Detection range: 0~100ppm
  5. Working Voltage: 3.3~5.5V DC
  6. Working Current: <5mA


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Brand: DF Robot
Category: Gas and Dust Sensor

This is a sensor that detects ammonia concentration and supports three output modes: analog, I2C, and UART. The probe has been calibrated at the factory, which can quickly and accurately measure the concentration of ammonia in the environment. Can be widely used in the detection of ammonia in industrial and environmental protection fields.The probe adopts the electrochemical principle, has the characteristics of strong anti-interference ability, high stability, high sensitivity, etc., and the service life is as long as two years. The sensor has 32 modifiable I2C addresses, an integrated temperature compensation algorithm, and a threshold alarm function, It has good compatibility with mainstream main control devices such as arduino, ESP32, and RASPBERRY PIE. The easy-to-use Gravity interface, coupled with our sample code, can quickly build an ammonia concentration detector.

DFRobot has introduced 12 gas detection sensors in this series, CO, O2, NH3, H2S, NO2, HCL, H2, PH3, SO2, O3, CL2, HF, which are used in exactly the same way and data format, so you can combine them according to your needs.

Useful Link:



  1. Industrial ammonia detection
  2. Environmental protection device


  1. Strong anti-interference ability
  2. High stability
  3. High sensitivity

Package Includes:

1 x DFRobot Gravity NH3 Sensor (Calibrated) – I2C & UART

SKU: 1356255 Category:

DFRobot Gravity NH3 Sensor

Detection Gas

Ammonia (NH3)

Detection range


Working Voltage

3.3~5.5V DC

Working Current


Output Signal

I2C, UART (0~3V), analog voltage


Arduino, ESP32, Raspberry pi


>2 years (in the air)

Working Humidity Range

15~90%RH (non-condensing)

Operating Temperature (°C)


Product Dimensions

37 x 32mm

Shipping Weight 0.079 kg
Shipping Dimensions 13 × 9 × 4 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Reimbursement or replacement will be done against manufacturing defects.

What voids the warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China