DF Robot Gravity PH3 Sensor (Calibrated) – I2C & UART


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SKU: 1210002
  1. Detection Gas: CO, O2, NH3, H2S, NO2, HCL, H2, PH3, SO2, O3, CL2, HF(Need to change different probe).
  2. Working Voltage: 3.3~5.5V DC.
  3. Working Current: <5mA.
  4. Working Temperature: -20~50℃.


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Brand: DF Robot
Category: Gas and Dust Sensor

DF Robot Gravity PH3 Sensor (Calibrated) – I2C & UART detects phosphine concentration and supports three output modes: analog, I2C, and UART  ( universal asynchronous receiver-transmitter, Functions of the UART: Converts parallel data into serial data for outbound communications. Converts serial data into parallel data for inbound communications. Adds a parity checking bit on outbound transmissions and checks the parity bit for inbound transmissions.). The probe has been calibrated at the factory, which can quickly and accurately measure the concentration of phosphine in the environment which can quickly and accurately measure the concentration of oxygen in the environment. Can be widely applied to fields like portable devices, air quality monitoring devices, industries, mines, warehouses, and other spaces where the air is not easy to circulate.

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 Pi. The easy-to-use Gravity interface, coupled with our sample code, can quickly build an oxygen concentration detector.

Useful Link:



  1. Industrial phosphine detection.
  2. Mining phosphine detection.
  3. Environmental protection device.


  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.

Package Includes:

1 x DF Robot Gravity PH3 Sensor (Calibrated) – I2C & UART.

SKU: 1210002 Category:
Detection Gas

CO, O2, NH3, H2S, NO2, HCL, H2, PH3, SO2, O3, CL2, HF

Working Voltage

3.3 to 5.5V DC.

Working Current(mA)


Output Signal

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

Operating Temperature (°C)

-20 to 50

Working Humidity Range

15 to 90%RH

Storage Humidity

15 to 90%RH (non-condensing).


>2 years

Storage Temperature

-20 to 50

Shipping Weight 0.08 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. 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