DFRobot Gravity CL2 Sensor (Calibrated) – I2C & UART


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SKU: 1356238
  1. Brand: DFRobot
  2. Product: Gravity CL2 Sensor (Calibrated) – I2C & UART
  3. Detection Gas: Chlorine (CL2)
  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: Water TDS, pH, Flow, Level and Pressure Sensor

This is a sensor that detects chlorine 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 chlorine in the environment. Can be widely used in the detection of chlorine in the chemical, pharmaceutical production, 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 pi. The easy-to-use Gravity interface, coupled with our sample code, can quickly build a chlorine concentration detector.


  1. Air quality monitoring device
  2. Mining air detection
  3. Environmental protection
  4. Smart Farming


  1. Strong anti-interference ability
  2. High stability
  3. High sensitivity
  4. Light weight
  5. Easy to use
  6. plug & play

Package Includes:

1 x Gravity: O2 Signal Conversion Board

1 x O2 sensor probe

1 x Gravity – 4pin Cable


Gravity: O2 Signal Conversion Board

Detection Gas

Chlorine (CL2)

Detection range


Working Voltage

3.3~5.5V DC

Working Current


Output Signal

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


Arduino, ESP32, Raspberry pi


>2 years (in the air)

Adapter Plate Size

37 x 32mm

Working Humidity Range

15~90%RH (non-condensing)

Operating Temperature (°C)


Shipping Weight 0.083 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. Reimbursement or 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