DFRobot
Gravity Calibrated NH3 Ammonia Sensor - I2C/UART
· MPN: SEN0469
This calibrated gas sensor measures ammonia concentration in the environment using an electrochemical probe. It supports three output modes — analogue, I2C a...
This calibrated gas sensor measures ammonia concentration in the environment using an electrochemical probe. It supports three output modes — analogue, I2C and UART — so it can slot into a wide range of microcontroller and single-board computer projects.
The probe is factory-calibrated for quick setup and is designed for industrial ammonia detection and environmental protection devices. It offers strong anti-interference performance, high stability and high sensitivity, with a service life of more than two years in air.
The Gravity signal conversion board is compatible with mainstream controllers including Arduino, ESP32 and Raspberry Pi. It supports 32 modifiable I2C addresses, an integrated temperature compensation algorithm and a threshold alarm function, with sample code available to help you build an ammonia concentration detector quickly.
Included are Gravity: NH3 Signal Conversion Board x1, NH3 sensor probe x1 and Gravity - 4pin Cable x1. This sensor is part of DFRobot's calibrated gas sensor series, which uses the same method and data format across multiple gas types.
Features:
- Strong anti-interference ability
- High stability
- High sensitivity
Specifications:
- Detection Gas: Ammonia (NH3)
- Detection range: 0~100ppm
- Working Voltage: 3.3～5.5V DC
- Working Current: ＜5mA
- Output Signal: I2C, UART (0~3V), analog voltage
- Working Temperature: -20～50℃
- Working Humidity: 15～90%RH (non-condensing)
- Storage Temperature: -20～50℃
- Storage Humidity: 15～90%RH (non-condensing)
- Lifespan: >2 years (in the air)
- Adapter Plate Size: 37*32mm
- Compatibility: Arduino, ESP32, Raspberry pi
Jargon buster
Plain-language definitions for the technical terms used above.
- ESP32
- ESP32 is a family of microcontroller modules with built-in wireless features such as Bluetooth and WiFi. Knowing this product uses an ESP32-based module helps explain how it provides wireless serial communication and firmware update features.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- single-board computer
- A complete computer built onto one circuit board, usually including the processor, memory, ports, and connectors. This matters because accessories like heatsinks must match the board’s layout and mounting holes to fit properly.
- Temperature compensation
- Temperature compensation means the sensor adjusts its readings to reduce errors caused by changes in water temperature. This matters for field monitoring because ponds, rivers, and tanks can vary in temperature throughout the day and across seasons.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
Find this product in
Supplier page — dfrobot.com
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