#28144
kaindub
Flatchatter

    I used to work for one of the large electrical accessory manufacturers.

    I have never heard of an expiry date for smoke detectors.

    There are two types of smoke detector technology

    One uses a reflective surface ( smoke and mirrors) so there is no wearing parts

    The other type uses a nuclear isotope which has an extremely long half life.

    Again no wearing parts

    Maybe I am not up with tecnology but I have smoke detectors in a number of residential buildings which are over 20 years old and they work

    Robert