Gases sensor module

Model: MQ-2.
Gases sensor module.
The module can detect or measure gasses like LPG, alcohol, propane, hydrogen, CO and even methane. The module version of this sensor comes with a digital pin which makes this sensor to operate even without a microcontroller and that comes in handy when you are only trying to detect one particular gas. When it comes to measuring the gas in ppm the analog pin has to be used, the analog pin also TTL driven and works on 5V and hence can be used with most common microcontrollers.

Specifications:
Built in power indicator LED and Low TTL indicator LED
Operating voltage is +5V
Can be used to measure or detect LPG, alcohol, propane, hydrogen, CO and even methane
Analog output voltage: 0V to 5V
Digital output voltage: 0V or 5V (TTL Logic)
Preheat duration 20 seconds
Can be used as a Digital or analog sensor
The sensitivity of digital pin can be varied using the potentiometer
Dimension (mm): 32 (L) x 22 (W) x 27 (H)

Applications:
Detects or measure gases like LPG, alcohol, propane, hydrogen, CO and even methane
Air quality monitor
Gas leak alarm
Safety standard maintenance
Maintaining environment standards in hospitals