I'm just putting in some contact sensors outside (in the cold Canadian Winter), on some wooden gates. I don't know how they are going to work, but they advertise a wide gap between the magnet and the sensor. I will let you know how these fare.
Boasts:
- 4 years battery Life: boasts a battery Life of up to 4 years and Includes Tamper sensing switch.
https://www.amazon.ca/Ecolink-Wireless-Window-Contact-4655BC0-R/dp/B07HN5CZCX/ref=sr_1_9?dchild=1&keywords=zigbee+contact+sensor&qid=1608068962&sr=8-9
