question about MQ-8 sensor

ok folks Im wanting to build an automatic gun for rodents ( Racoon ) getting into my garden

i was going to put a potato gun inside a Box with a break beam laser circuit when he or she breaks the laser beam I was going to fire a shot not to kill but to scare anyway does anyone know if I can put
the MQ-8 sensor inside my potato gun I will be using HHO to fire i know it will make a very loud Bang
should scare the animal out of it's skin

i dont care what anyone says HHO is the best propellant for any pneumatic gun I dont want to cook my sensor
just wondering what people might think about it