If you have read your meter’s manual you have most certainly come across it’s “correction calculation”, usually in the back of the manual. But Isobutane is not a common flammable, so why did it make it on the list of those popular flammables? It is because of the “green movement”… yes, Isobutane (R-600a) is a popular refrigerant for small appliances. In terms of ASHRAE 34a listing, it is an A3 Refrigerant… meaning it carries the highest flammability rating, but a lesser toxicity rating, of refrigerants (as shown below)
Isobutane and your LEL sensor’s correction calculation
