Good afternoon!

In regards to combustible gas sensitivity, the best detector in the industry is the INFICON GAS-Mate. The GAS-Mate is TWICE as sensitive as the closest competitor, operates on 2 D batteries, and comes with a 3 year, over the counter warranty. If you'd like to get some more information on this for yourself, give us a call, or check out the link below. Thanks!

http://www.inficoncombustiblegasleak...stiblegas.html