MS13a Motion Sensors don't like the cold

[Gogs]

yea did think of that, maybe add recharable batteries also so in the event of power failure, the config is not lost?

Good thinking.

One thought I have had, as all but two of my sensors located outside have failed during the cold snap we are experiencing, was will they detact movement through a perspex/plastic screen? I know they wont though glass.

If they do was to mount them in a heated box.