Contact Sensor - blend in to trim - film or stain case?

[calinatl]

Thank you for the info however that one won't work in my application. I have to use the Zooz one that is 0.3" thick.

Current Smallest Contact Sensor?

SUCCESS!!! The Zooz ZSE-41 works great as a locked/unlocked indicator for a 2017 Pella sliding door latch. I have a slim strip from my security system installed on the door/frame to alarm if the door is opened when it should not be, and ensure the door is slid fully closed. However, the concern was leaving the latch in the unlocked position overnight. I cannot find a smart lock that would fit and/or pass HAF. I decided to try to fit an open/close sensor to indicate the latch locking statu…

So now that is works, I need to figure out how to make it blend in...