I'm currently producing feasibility studies for replacement hobs within student accommodation. The replacement of the hob is straight forward enough, but the client has is looking for additional safety devices to isolate the hobs if a problem should arise. This will be alongside isolation switches above the counter and also RCBOs at the DB. The initial idea this:

https://www.kitchenstoveguard.co.uk/stove-guard/

I don't have much confidence in the information on this product. Claiming that the battery will last 10 years, and that there is no need for monthly testing.

If anyone has any advice on this product or similar, or even another method I'd like to hear it.

Thanks