Features:
- The gas sensing material used in the MQ-4 gas sensor is tin dioxide (SnO2) with low conductivity in clean air.
- It adopts high quality double panel design with power indication and TTL signal output indication
- It has DO switch signal (TTL) output and AO analog signal output
- The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)
- The voltage of the analog output, the higher the concentration, the higher the voltage.
- It has good sensitivity to gas and natural gas detection.
- there are four screw holes for easy positioning;
- product dimensions: 32 (L) * 20 (W) * 22 (H)
- has a long service life and reliable stability
- quickly response recovery characteristics
The digital output D0
With the help of the potentiometer placed on the reverse side of the board, set is the threshold above which the output D0 is changed from a high to a low status. The output D0 can be linked directly with a microcontroller or commissioning set, including Arduino, or for example, with a module of a buzzer which will signal too low or high level of gasesin the air.
Analog output A0
The sensor has an analog output A0 which must be connected to the pin of the converter A/D (of analog input in Arduino). This will allow you to measure the proportional voltage signal and more accurately determine the concentration.
Specifications:
- Detection of gas: Natural gas/Methane
- Detection of Concentration:300-10000ppm
- Input voltage: DC5V
- Power consumption (current): 150mA
- Power supply: from 2.5 V to 5 V
- Analog and digital output
- Pins: Pin connectors, 2.54 mm pitch
- Board sizes: 32 (L) * 20 (W) * 22 (H)
- It has mounting holes with diameter: 2 mm
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