Ei650RF Optical Smoke Alarm

The Ei650RF is a battery operated optical smoke Alarm designed to quickly sense all domestic fire types.


  • High performance optical sensor
  • Wireless interconnect
  • 10 year sealed Lithium battery
  • Easy to install twist-on base
  • Large easy to use Test/Hush button
  • Alarm ramp up in Test mode
  • Integrated piezoelectric sounder


The Ei650RF 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. 

In standby, there are no visible or audible indicators on the Ei650 range that could disturb the occupant making it ideal for bedrooms and children’s rooms.

It is powered by a sealed 10 year Lithium battery that will last the entire product life in normal conditions of use.

The Ei650RF communicates wirelessly via its preinstalled Ei600MRF RadioLINK+ module with compatible Ei Electronics Alarms and accessories.  Up to 12 RF devices can be interconnected.

The Ei650RF is fitted with a large easy to use Test Button to facilitate frequent testing of the Alarm.  For better hearing comfort, 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.

The Ei650RF self-checks its chamber sensor, battery voltage and internal circuitry every 40 seconds.  Any fault condition found will be indicated by a combination of Red LED flashes and/or sound beeps.

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.

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.

Sensor Type:Photoelectric
Product Life:10 years
Supply Voltage:3V Lithium Battery (non replaceable)
RF Frequency:868Mhz band (1% duty cycle)
RF Power:+10dBm
RF Range:>100m in free air
Protocol Type:Mesh architecture
RF PrototypeRadioLINK+
System Size:Up to 12 RF devices
Sound Level:85dB(A) at 3m (except in Test mode)
Button Test:Checks sensor, electronics, battery and horn
Silence Function:Silences alarm for 10 minutes
Visual Indicators:
  • Red LED: Power up, alarm, hush mode & fault
  • Blue LED: RF transmission
Insect Screen:Fine Mesh
Fixings:Screw fixings and mounting plate supplied

Normal Operating and Storage Temperature Range:

-10°C to 40°C

Normal Operating and Storage Humidity Range: 

15% to 95% relative humidity
  • Product - 115mm x 45mm
  • Package - 150mm x 120mm x 56mm
Weight:210g (pack +50g)
Warranty:5 years


Product Manual

Product Datasheet