DFRobot Gravity HF Sensor (Calibrated) – I2C, UART and analog


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SKU: 1356245
  1. Brand: DFRobot
  2. Product: Gravity HF Sensor (Calibrated) – I2C & UART
  3. Detection Gas: Hydrogen fluoride (HF)
  4. Detection range: 0~10ppm
  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 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 environmentCan 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, ESP32, and raspberry pie. 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, 02, 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.

Connection Diagram:

Useful Link:



  1. Factory calibrated, accurate measurement
  2. High sensitivity, low power consumption
  3. Excellent stability and anti-interference
  4. Three output modes: I2C, UART and analog
  5. Long service life(2 years)
  6. Compatible with 3.3~5.5V main controllers
  7. 32 modifiable I2C addresses
  8. Reverse connection protection
  9. Temperature compensation
  10. Threshold alarm
  11. It use I2C, UART and analog communication protocol to make smooth commutation between sensor and micro-controller.

Package Includes:

1 x DFRobot Gravity HF Sensor (Calibrated) – I2C, UART and analog

SKU: 1356245 Category:
Detection Gas

Hydrogen fluoride (HF)

Detection range


Working Voltage

3.3~5.5V DC

Working Current


Operating Temperature (°C)

-20 to 50

Working Humidity Range

15~90%RH (non-condensing)

Storage Temperature


Storage Humidity

15~90%RH (non-condensing)


>2 years (in the air)

Adapter Plate Size

37 x 32mm

Shipping Weight 0.082 kg
Shipping Dimensions 13 × 9 × 5 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids 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