Hi Sue and All,

Those 4 gas meters are not something a consumer would go out and purchase for continuous monitoring like a standard CO or smoke detector. They are designed to check the atmospheric conditions as a result of some type of situation that would warrant such a device. Some of the situations include malfunctioning furnace/fire place/wood stove, CO or smoke detector activation, fire or any situation where occupants complain of headache, weakness, troubled breathing. The meters are somewhat expensive staring around $485 ( 4 Gas Meter ) and can go up to a couple of thousand dollars. They must first be calibrated to unaffected air and must be “bump’ tested before use (or at least daily). A bump test involves exposing the meter to a shot from a can of gases to which the meter will respond, not a cheap enterprise.

In most jurisdictions, the fire department will come out to your home as a good intent call with a meter and check the atmosphere if you suspect exposure.

Pete