Skip to content

Crowbits-Gas Sensor


This module is a converter that converts a gas integral number into a corresponding electrical signal. It mainly uses the chemical potential difference between two electrodes. One electrode measures the gas concentration in the gas, and the other electrode is a fixed reference electrode When the concentration of a certain measured gas exceeds the standard, the concentration value will be higher than the electrical signal of the reference electrode, and the module will output the corresponding concentration value effect.



  • Easy to use


  • Interface Type: Analog input
  • Operating Voltage: 3.3V DC
  • Dimensions: 31.5(L)*24.5(W)*13(H)mm


The following sketch demonstrates a simple application of the module.

1. You need to prepare a Crowbits motherboard, such as Crowbits-UNO board.

2. Connect the module to the I2C interface on the Crowbits-UNO board, as shown in the figure:

Crowbits-Gas Sensor-Wiki 1.JPG

3.Upload the following code to the Crowbits-UNO board.

void setup() 

void loop() 
  float sensor_volt;
  float sensorValue;

  sensorValue = analogRead(A2);
  sensor_volt = sensorValue / 1024 * 5.0;

  Serial.print("sensor_volt = ");

4.After the upload is successful, open the serial port monitor, the baud rate is set to 9600.When gas is detected, the voltage value output by the serial port will change.

Crowbits-Gas Sensor-Wiki.jpg