(Pre-Subcategory creation) Deals/Sales/Coupons/Pricing

I have 3 or 4 of the monoprice/schlage design which I’m going to swap out for the 4 Iris contact switches that I ordered. I figure I can repurpose the older units into a smoke detector:

or a water leak detector:

or a pressure sensor:

I have to justify my purchases somehow! I just couldn’t pass up that deal and like many of you, I bought them before I figured out what I was going to do with them.

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