Fire alarm units need to be developed and mounted according to constructing codes, which specify the categories of detectors, alarms, and Command panels to be used in different types of structures. Blend: Since the title implies, it is a smoke detector that makes use of the two photoelectric and ionization https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/