Detecting an open door

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Thread Starter

Ron Brown

I have a hazardous chemical storage container with sliding metal doors. I am not concerned when they open, but when those doors are open for longer than 5 minutes I would like for an audible alarm to sound letting an operator know that they are open. What sensors (proximity, timing relay?) would I need and how should I connect them?
 
Ron Brown... I did something similar!

It eliminated that all too bothersome 2AM call from a neighbor telling me my door was open!

Both, wireless and CMOS Logic circuits available!

Phil Corso (cepsicon [at] aol [dot] com)
 
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Zacharia, Tomy

> I have a hazardous chemical storage container with sliding metal doors. I am not concerned when they open, but when those doors are open for longer than 5 minutes I would like for an audible alarm to sound letting an operator know that they are open. What sensors (proximity, timing relay?) would I need and how should I connect them? <

When you say hazardous, you are raising too many questions. Probably that's why nobody has 'hazarded' a guess. Please define hazardous, only then can we get an answer.

Regards,
Tomy Zacharia
 
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