So I’ve been testing Iris and ST contact sensors to see which goes further and which is faster.
I took two Iris and two ST sensors and put them at the same distance. I kept going until one sensor started to fall off the network, all four are zigbee sensors.
Iris went an extra 25ft in distance before I had trouble reading open/closed status.
Iris was also faster by about 1.5s at responding to status changes at same distance (right before ST falls off).
I’ve had both for little over a year, battery seems the same for me.
The only other deciding factor is appearance.
Kinda dissappointed that a “SmartThing” sensor would be beat by one of the cheapest sensors though.
You can pick up Iris sensors for about $17 with coupons vs ST at $40/ea (sometimes sale $30).