Smoke Alarm


The Ei650i optical Smoke Alarm is fitted with a proprietary photoelectric sensor to quickly sense low energy smoke particles. This optical Alarm is sensitive to all domestic fire types but is especially sensitive to smoldering fires.

The Ei650 range features a high performance optical chamber protected by a sealed mesh screen to reduce insect and dust contamination and EMC protection to reduce false alarms. In addition the Ei650i has an automatic dust compensation feature reducing further the risk of false alarms caused by dust build up.



The Ei650i is a battery operated standalone optical smoke Alarm designed to quickly sense all domestic fire types.

  • High performance optical sensor
  • Automatic dust compensation
  • AudioLINK data download
  • Fault hush and diagnostics features
  • 10 year sealed Lithium battery
  • Easy install twist-on base
  • Large easy to use Test/Hush button
  • Alarm ramp up in Test mode
  • Specific fault led
  • Records previous alarm activation
  • Integrated piezoelectric sounder

The AudioLINK feature facilitates acoustic download of the Alarm parameters and status using the Ei Electronics AudioLINK app.

The Ei650i is fitted with a large easy to use Test Button to facilitate frequent testing of the Alarm. For better hearing comfort for professionals who regularly test these products and the occupant, the sound level of the alarm increases progressively in Test mode. The Test button can also be used to silence nuisance alarms (e.g. cooking fumes) for a 10 minute period and fault beeps for 12 hours (low battery and sensor fault).

The Ei650i self-checks its chamber sensor, battery voltage and internal circuitry every 40 seconds. Any fault condition found will be indicated by a combination of Yellow LED flashes and sound beeps.

The Ei650i is designed with advanced diagnostics to help pre-warn of possible impending fault conditions.

The Alarm has a twist on mounting base which has multiple fixing points so it can be easily installed. The alarm is not powered until it is twisted onto the mounting base, thus avoiding battery power consumption during storage and prior to installation.