What is this?

[J D Hogg]

Hi all,

Does anyone know what this is? In the photo below it is the thing with the led light on, it's some kind of alarm and it's beeping. It's at floor level in a bedroom in a newish block of flats.
Thanks

 

[PS Electrics]

Toshiba Indoor Refrigerant Sensor? According to Google

 

[westward10]

Great bit of detective work.

TCB-LDS1 & TCB-LDS2 Leak Detection Sensors inc. 12V Supply - Toshiba Air Conditioning UK

Single zone recessed leak detection sensor with a white plastic or stainless steel facia plate supplied with remote 12 Volt supply transformer.

www.toshiba-aircon.co.uk