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Carbon Monoxide Detector with Optional Memory Feature - Ei204EN

Discontinued Product

This product has been discontinued and is no longer available to buy.

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Product Overview
The Ei204EN is a battery operated CO detector with a fast CO detection test feature, easy to use test/hush feature and a 5 year sensor life.
  • Batteries included (3xAA batteries)
  • 5 years battery life and sensor lifespan
  • Loud distinct alarm (85 dBA at 3 metres)
  • with LED lights to display power and alarm status
  • Proven sensor - based on electrochemical technology
  • The unit checks the CO concentration every 50 seconds
  • At the manufacturer all units are individually calibrated and tested with CO gas to ensure accuracy
  • Detector alarms from: 30ppm (parts per million) CO gas
  • Easy to use Test/Hush button
  • Automatic self diagnostics
  • Can be tamper-proofed
  • Fast CO test mode
  • 2 Year Guarantee (limited) 
  • Kitemarked to BS EN 50291:2001 and CE marked
  • Manufactured in Republic of Ireland
  • Attractive slimline casing
  • Dimensions (HxWxD): 135x105x71mm
Technical Data
Product Code EI204ENWX
Brand EI Electronics
Weight 0.26kg
Product Datasheets
FAQs (1)
Q. Does the Ei204 carbon monoxide alarm have an end of life indicator?

Yes, the CO alarm will beep every 45 seconds and the green light will flash. There is also a 'replace by' date on the alarm.

Customer Reviews

21 customers have given this product an overall rating of 4.4 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 4 / 5 Stars

Reviewed by: A E

Easy to install. Test system works Difficult to know how to rate this item when brand new as it is a cm detector with a number of years guarantee. Ask me again in 2026 to see if it is still working!!

Published on: 3rd August 2019

Rating: 3 / 5 Stars

Reviewed by: M S

OK as far as I know, 2nd one I've had, previous one was OK but had reached end of life.

Published on: 14th March 2018

Rating: 5 / 5 Stars

Reviewed by: A C

Does what it says on the tin (hopefully)

Published on: 17th September 2017

Rating: 4 / 5 Stars

Reviewed by: P T

Longlasting and consistently reliable

Published on: 25th March 2017

Rating: 5 / 5 Stars

Reviewed by: D H

I bought this product to replace a 5 year old product of the same make & model,need I say more?

Published on: 8th November 2016

Rating: 3 / 5 Stars

Reviewed by: C C

I assume it will work I cannot say if it is a good product until it detects CO. However, I can say that the flashing light is very irritating in the darkened bedroom and I have placed tape over it.

Published on: 19th August 2016

Rating: 4 / 5 Stars

Reviewed by:

reliable and conveinent third replacement gives peace of mind

Published on: 5th July 2015

Rating: 5 / 5 Stars

Reviewed by:

V G company good all round company no problems with ordering, delivery or product very good site to use.

Published on: 15th September 2013

Rating: 4 / 5 Stars

Reviewed by:

does the job and gives peace of mind.

Published on: 26th July 2013

Rating: 5 / 5 Stars

Reviewed by:

Great products, great service, great website, why go anywhere else? As somebody who has a technical brain (I am a chartered engineer) but no knowledge of this product except that it is a necessary safety accessory for any home. I was presented with two alarms in our home that displayed warnings that the batteries were at the end of their useful life.

Published on: 4th June 2013

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