The Series 65 Optical Smoke Detector uses light sensing technology to “see” smoke entering the chamber. The external detector molding is identical to that of the ionization detector, and has an indicator LED which is clear in quiescent state and produces a red light in alarm.
Please be aware that we have some scheduled work being undertaken at our offices on Wednesday 19th February which will result in our phone lines being down for a while between 10am and 12pm. Please bear with us if you cannot reach us between these times and be sure to call back after 12am when we will be back to our normal levels of 1st class service, Thanks Team MES