MQ-2 liquefied natural gas sensor

First, the long dimension: 32mm X 22mm X height 27mm width
Second, the main chip: LM393, ZYMQ-2 gas sensor
Third, the working voltage: DC 5 V
Four, features:
1, a signal output indication.
2, the dual signal output (analog output, and TTL level output)
3, TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller)
4, analog output 0 ~ 5V voltage, the higher the concentration the higher the voltage.
5, liquefied petroleum gas, natural gas, city gas has good sensitivity.
6, has a long life and reliable stability
7, rapid response recovery characteristics
V. Application:

For home or factory gas leakage monitoring devices, suitable for liquefied petroleum gas, butane, propane, methane, alcohol, hydrogen, smoke and other monitoring devices.