# Gravity: HF Sensor (Calibrated) - I2C & UART

**Type:** Product page · **SKU:** SEN0475 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-hf-sensor-calibrated-i2c-uart.html ([markdown](https://core-electronics.com.au/gravity-hf-sensor-calibrated-i2c-uart.html.md))

The factory-calibrated hydrogen fluoride sensor has a variety of signal output methods to meet various communication needs...

## Pricing

- **Price:** $424.95 (inc GST) — $386.32 AUD, exc GST
- **Quantity discounts:** 6+ $367.00 (exc GST) · 12+ $351.55 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## Description

This is a sensor that detects hydrogen fluoride 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 hydrogen fluoride in the environment.** Can be widely used in the detection of hydrogen fluoride 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](https://www.dfrobot.com/product-610.html), [ESP32](https://www.dfrobot.com/product-2231.html), and [Raspberry Pi](https://www.dfrobot.com/product-2133.html). The easy-to-use Gravity interface, coupled with our sample code, can quickly build a hydrogen fluoride concentration detector.

DFRobot has introduced 12 gas detection sensors in this series, [CO](https://core-electronics.com.au/gravity-co-sensor-calibrated-i2c-uart.html), [O2](https://core-electronics.com.au/gravity-o2-sensor-calibrated-i2c-uart.html), [NH3](https://core-electronics.com.au/gravity-nh3-sensor-calibrated-i2c-uart.html), [H2S](https://core-electronics.com.au/gravity-h2s-sensor-calibrated-i2c-uart.html), [NO2](https://core-electronics.com.au/gravity-no2-sensor-calibrated-i2c-uart.html), [HCL](https://core-electronics.com.au/gravity-hcl-sensor-calibrated-i2c-uart.html), [H2](https://core-electronics.com.au/gravity-h2-sensor-calibrated-i2c-uart.html), [PH3](https://core-electronics.com.au/gravity-ph3-sensor-calibrated-i2c-uart.html), [SO2](https://core-electronics.com.au/gravity-so2-sensor-calibrated-i2c-uart.html), [O3](https://core-electronics.com.au/gravity-o3-sensor-calibrated-i2c-uart.html), [CL2](https://core-electronics.com.au/gravity-cl2-sensor-calibrated-i2c-uart.html), [HF](https://core-electronics.com.au/gravity-hf-sensor-calibrated-i2c-uart.html), which are used in exactly the same way and data format, so you can combine them according to your needs.

![Gravity: HF Sensor (Calibrated) - I2C & UART](https://core-electronics.com.au/attachments/localcontent/1(2)_18296768145.png)

### Features

- Strong anti-interference ability
- High stability
- High sensitivity
 
### Applications

- Industrial hydrogen fluoride detection
- Environmental protection device
 
### Specification

- 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°C
- Working Humidity: 15~90%RH (non-condensing)
- Storage Temperature: -20~50°C
- Storage Humidity: 15~90%RH (non-condensing)
- Lifespan: >2 years (in the air)
- Adapter Plate Size: 37\*32mm
- Compatibility: Arduino, ESP32, Raspberry pi
 
  **Documents**- [Product wiki](https://wiki.dfrobot.com/SKU_SEN0465toSEN0476_Gravity_Gas_Sensor_Calibrated_I2C_UART)
 
### Parts List

- Gravity: HF Signal Conversion Board x1
- HF sensor probe x1
- Gravity - 4pin Cable x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_12848.jpg)