I believe this question has been asked before. Does anyone know of Carbon Monoxide sensors that have an output compatible with a PIC for under $30? I have seen home units that alarm at a pre-set level and cost about $40.00. Thanks in advance Gus Calabrese -- Gus Calabrese Lola Montes WFT Electronics 4337 Raleigh Street Denver, CO 80212 303 964-9670......voicemail mailto:wft@frii.com http://www.frii.com/~wft Alternate: 791 High Street Estes Park, CO 80517 if no success with wft@frii.com, try .... mailto:wft@bigfoot.com then mailto:wft@eudoramail.com