This Optical Smoke Alarm is battery powered with a sealed in lithium battery and has a 10 year life. It is a standalone unit which is easy to fit with a twist on base. It features a large test/hush button which enables you to both manually test the alarm and also silence false alarms. The alarm self-tests every 40 seconds and indicates any alarm faults with red LED warnings. It is ideal for domestic use with a high performance optical chamber which is best for slow smouldering fires.
The EI 204 Carbon Monoxide Detector is designed to protect you from the dangers Carbon Monoxide gas. This tamperproof Carbon Monoxide Alarm is battery powered, enabling it to continue monitoring CO levels even in the event of a power failure. It requires 3 x AA batteries (included) and comes with both a testing and a hush button. It uses the proven electrochemical cell type sensor which checks CO concentration every 50 seconds; all units are individually calibrated and tested in CO gas in order to ensure accuracy. As it is battery powered no wiring is required and it complies with BS EN 7860:1996 & BS EN 50291-1.