• UL217 (UL268 ready)
  • Automatic dust compensation
  • AudioLINK Diagnostics (Optional)
  • Unique plug-in Radio Module design
  • Large, “EZ-Press™” Test/Hush button
  • Supervised sensor status
  • Automatic smoke chamber status
  • Built-in sounder – 85dB(A) at 3 meters
  • LED Alarm indication
  • Easy to install twist-on base design
  • Innovative & robust optical chamber design
  • 5 year Warranty
Product Description

The EiA650W range of Optical Smoke Alarms apply high-reliability photo-electric sensing technology, providing quick warning to all standard domestic fire types, including smoldering fires other devices might miss.
A unique external 8-pin header design enables simple, plug‐in interface with a wide range (frequency and/or protocol) of custom OEM radio modules. No opening of the case required or need to solder potentially trouble-prone ribbon cables.

EiA650W devices are specifically designed for simple & intuitive, time saving installation, commissioning and maintenance. All necessary mounting hardware is included. The large, ergonomic, Test/Silence button enables full testing and the ability to temporarily silence false/nuisance alarms. The patented, high-performance optical chamber with integral micro-mesh™ fixed insect screen reduces the possibility of false alarms.
The Automatic dust compensation feature further reduces false alarms by compensating for dust build up in the chamber, while maintaining its detection sensitivity.

Technical Specifications


Optical, uses light scatter from smoke particles

Self Test

Automatic checking of alarm every 40 seconds.

Radio Integration

8 Pin header

Button Test

Simulates the effect of smoke to check chamber, electronics and horn.


Silences nuisance alarm. Automatically resets after approximately 10 minutes.

Supply Voltage

1x CR123A battery, Provision is made for a second Optional CR123A battery for extended Life.

LED Indication

Power-up, sensing fire, button test & low battery.

Audible Indications

Low battery & smoke chamber fault beeps

Alarm Sound Output

85dB (minimum) at 3m

Operating Temperature Range

40° to 100°F (*)

Storage Temperature Range

14°F to 104°F (*)

Humidity Range

15% to 95% Relative Humidity – non condensing


115mm x 45mm or 4.53“ x 1.77“ (diameter x height)


200 grams or 7.055 ounces without batteries


UL-217/(UL-268 Ready)
Manufactured to ISO 9001:2000 quality standards.


5 year (limited) warranty


Piezoelectric-horn (built-in)

(*)  Temperature and Humidity conditions are for normal operation and storage. Units will function outside these ranges as required by the specific Product Standards. However, extended exposure to conditions outside these ranges may affect product life. For advice on prolonged operation outside these ranges consult the manufacturer.

Model Variations


Short Description

EiA650WBase model
EiA650iWBase model with AudioLINK  
EiA650RFBase model with Ei Electronics module fitted 

Base model with RadioLink module fitted and AudioLINK



Datasheet EiA650W


Datasheet EiA650iW


Manual EiA600 SeriesBook Cartoon icon