Ei261DENRC Carbon Monoxide Alarm with LCD display

This product is End of Life – Replace with Ei3018

The Ei261DENRC is a Carbon Monoxide (CO) Alarm with 230V AC mains power supply and rechargeable lithium battery back-up.  It is most suitable for location in rooms containing a fuel burning appliance.

  • Proven electrochemical 10 year CO sensor
  • LCD display
  • 230V AC supply with rechargeable lithium battery back up
  • Hardwire interconnect
  • AudioLINK data download
  • Pre-alarm indication gives early warning of CO
  • Easy-fit base
  • Audible and visual “End of Life” indication
  • Test/Hush button
  • Memory feature
  • Integrated piezoelectric sounder
  • 5 Year guarantee
EN 50291-1:2010 + A1:2012

This product is End of Life - Replace with Ei3018

The Ei261DENRC Carbon Monoxide Alarm is fitted with a high performance, proven 10 year electrochemical sensor to detect the presence of toxic levels of Carbon Monoxide (CO).   Each sensor is individually calibrated and tested in Carbon Monoxide gas to ensure accuracy.  It is powered by 230V AC with a rechargeable 10 year built in battery backup supply to ensure continuous operation (up to 4 weeks) in the event of a power failure.

The Alarm is supplied with the "Easi-fit" base to facilitate quick and simple installation, combined with easy detector head removal and replacement. The Easi-fit base automatically connects both mains power and battery as the detector head slides on.

When the Alarm detects potentially dangerous levels of CO, the red LED flashes, the LCD displays the level of CO detected in ppm and if the CO persists the alarm will sound. The higher the level of CO detected, the sooner the alarm will sound.   

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

The Ei261DENRC may operate as a standalone Alarm or may be interconnected via hardwire to communicate with compatible Ei Electronics Alarms and accessories.  Up to 12 devices can be interconnected.

The Alarm self-checks its sensor, battery voltage and internal circuitry regularly.  Any fault condition will be indicated by a combination of visual and/or audible indicators (ie yellow flashes and beeps) and a fault code will appear on the LCD display.  The Alarm also has an “End of Life” indicator (audible and visual) which will notify the user when the Alarm needs replacing at the end of its 10 year operational life.

The memory feature allows an Alarm that has previously activated to be easily identified (as the red LED will continue to flash for 24hrs after the event or afterwards when you press the Test button).  If the Alarm has detected CO previously, the LCD will show the previous peak of CO when the Test button is pressed.

The Test/Silence button allows the user to check the operation of the Alarm.  This will check the sounder, battery voltage, sensor and internal circuitry.


Product life:10 years
Supply voltage:230V AC. 50Hz
Battery back-up:Rechargeable lithium battery back up
Sound level:85 dB(A) at 3m
Button test:Checks sensors, electronics and horn
Silence function:Silences alarm once for 4 minutes if <150ppm
Data download:Via the AudioLINK app
Visual indicators:
Green LED: Power
Red LED: Pre-alarm, alarm, hush mode and memory
Yellow LED: Fault
LCD screen displays level of CO detected, any fault found and last peak of CO
Memory feature:Records last alarm event
End of Life:
Audible and visual indicators
(3 beeps with 3 yellow flashes every 40 seconds + EL is displayed on LCD screen)
Normal Operating and Storage Temperature Range:-10°C to 40°C
Normal Operating and Storage Humidity Range:15 % to 95 % Relative Humidity
Plastic material:UL94V0 flame retardant
Fixing:Screw fixings and mounting plate supplied
 Product: 155mm x 128mm x 48mm
 Packaged: 160mm x 130mm x 50mm
Product only: 312g
 Packaging: 357g
Warranty:5 years 

Product Manual

Product Datasheet