DFRobot
Gravity HF Gas Sensor (Calibrated) - I2C/UART/Analogue
· MPN: SEN0475
Measure hydrogen fluoride concentration with a factory-calibrated electrochemical probe that supports analogue, I2C and UART output modes. It is designed for...
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Measure hydrogen fluoride concentration with a factory-calibrated electrochemical probe that supports analogue, I2C and UART output modes. It is designed for quickly building an HF concentration detector for industrial and environmental protection applications.
The sensor includes integrated temperature compensation, a threshold alarm function and 32 modifiable I2C addresses, making it flexible for multi-sensor projects. It works with common controllers such as Arduino, ESP32 and Raspberry Pi, and uses DFRobot’s easy-to-connect Gravity interface.
DFRobot provides sample code for getting started, and this kit includes the Gravity HF signal conversion board, HF sensor probe and a Gravity 4-pin cable. It is part of DFRobot’s compatible multi-gas sensor series, which shares the same usage method and data format across supported gases.
Features:
- Strong anti-interference ability
- High stability
- High sensitivity
Specifications:
- Detection Gas: Hydrogen fluoride (HF)
- Detection range: 0~10ppm
- 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
Suitable for industrial hydrogen fluoride detection and environmental protection devices where HF monitoring is required.
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- ESP32
- ESP32 is a family of low-cost microcontroller chips and modules from Espressif with built-in WiFi and Bluetooth. They support programmable firmware and over-the-air updates, and are commonly programmed with toolchains such as the Arduino core and ESP-IDF.
- 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.
- Temperature compensation
- Temperature compensation is when a sensor or instrument adjusts its readings to reduce errors caused by changes in temperature. This matters because a sensor's raw output often drifts as conditions warm or cool, so compensation keeps readings more consistent and accurate over time.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
Find this product in
Supplier page — dfrobot.com
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SEN0475 gravity factory calibrated electrochemical sensor hf dimension V1.0
Mechanical Drawings · 85.3 KB · Click any page to view full size
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