On 18 Oct 2020 at 15:05:16 BST, ""Brian Gaff""
wrote:

Hmm, I have to say I've not found problems with the ionising type myself
since many years ago, when an early one got very insensitive and made me
wonder if the source had the capacity to damage the chip.
It says on all my alarms, do not dispose of in general trash, take to a
recycling centre.
Brian

I think it says that on all electronic equipment nowadays. WEEEE regulations
or something.

--
Roger Hayter