Mystery box

[Gryphon2]

Anyone any idea what this is? Maybe a PIR for an alarm system. It has a red light permanently on.

 

[Daydream believer]

deleted

 

[Boathook]

Undo the 2 screws and see what is behind it ?

 

[Plum]

Anyone any idea what this is? Maybe a PIR for an alarm system. It has a red light permanently on.

Here it is PR-1B

 

[Gryphon2]

As I suspected!

 

[Gryphon2]

I think it is part of a Sealarm system which I believe to be defunct but I have no information on it and the previous owner sadly died a couple of days after we bought the boat. Any body know anything about them or is it a museum piece?