O-ZONE GAS DETECTION MODULE, MQ-131, LOW CONSENTRATION, 10PPB-2-PPM

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PID# 155352

CA$29.95
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Variants:
MQ-2
MQ-3
MQ-4
MQ-5
MQ-6
MQ-7
MQ-9
MQ-131
MQ-135
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Description

Ozone gas is a pale blue gas having a pungent smell. This gas is an allotrope of oxygen and is indicated as O3. But, this gas is less stable than the diatomic allotrope O2. Ozone is made from dioxygen by the action of UV and electrical discharges within the atmosphere of the earth. It is present in very low concentrations throughout and has the highest concentration in the ozone layer because it absorbs most of the ultra-violet radiations of the sun. So, to detect the concentration of ozone gas, there is a sensor, belongs to the MQ gas sensor series, known as the MQ131 ozone sensor.

The MQ-131 ozone gas sensor can sense ozone concentration levels in the air. An internal preheater inside the sensor helps to attain the ideal sensing conditions. But, because of this internal preheater, the sensor requires more current. Fortunately, the sensor comes pre-calibrated, however, final calibration is needed for accurate measurements.

Features

  • It has a TTL output. TTL output valid signal is low.
  • When the output is low than the signal is bright.
  • It can be connected to the microcontroller IO port.
  • Its analog output decreases when the concentration increasing.
  • The signal output indicator light.
  • It is highly sensitive to ozone gas.
  • The sensor has a long service life and reliable stability.
  • It has a fast response and recovery feature.

Specifications

  • Operating Voltage: 4.5V to 5V DC.
  • Interface type: Analog.
  • Circuit voltage: 5V±0.1
  • Heating voltage: 6V±0.1
  • Heater resistance: 31Ω±5%
  • Heating consumption Less than 1100m
  • Resistance: 100KΩ-200KΩ (50ppb O3 )
  • Temp: 20℃±2℃ Vc:5V±0.1
  • Humidity: 65%±5% Vh: 6V±0.1

Pinouts of MQ131 Sensor

Pin Number Pin Name Description
1 Vcc The [in is there to power the module, requires 5V
2 Ground To connect the module to the system’s common ground
3 Digital Out Digital output pin, the Threshold value can be set by using the potentiometer
4 Analog Out Analog output pin. Analog voltage based on the concentration of the gas 

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