I am currently installing CO detection in MA in hotels and I am using one of the technical options of which I am using technical option F. I have been using a CM15a co detector manufactured by 3M and I was informed that this would not meet the requirement of the technical option F as the activating point is not 50 PPM. Does anyone know of a UL approved CO detector that is 24v wall mount with a NO/NC contact that will activate at 50 parts per million.
shortcircuit, Have you looked into possible use of the 3M/Macurca CM-1B? May be able to latch at 35PPM/TWA. If they are going to be installed in areas like boiler and laundry rooms to provide OSHA exposure time protection for workers, maybe they would work for you. Probably not adequate for public areas though. Seems that most everything else is 70PPM.
shortcircuit, I've posted your question to a couple of fire alarm forum sites. Hopefully, someone there will have an answer. I have looked every where myself, but so far can't find anything in the U.S. that will latch at 50 PPM. Not even finding 4/20 transducer models that can be set that low. Seems to be some European stuff that will, but of no use to us here. Since I also live in MA, I may run into this same situation, so it would be good if someone had an answer. Leave it MA to require something that may not even exist. Please post back if you find something. TKX
Well, after ten days the only response I got from one of the alarm sites that I posted this question on was to "contact 3M/Macurca, because they do this kind of thing all the time." So, I guess, if you haven’t already tried them, maybe they can help.