# Safeliveo CO03 Carbon Monoxide Detector with Digital Display

Detector: The Safeliveo CO03 is a standalone, battery-powered carbon monoxide alarm with a digital CO display and replaceable AA batteries. Its listed features include a 10-year sensor life, low-level warning and peak-value memory, with both free-standing and wall-mounted placement described.

- [Original product page](https://bargainpostbox.co.uk/product/safeliveo-co03-carbon-monoxide-detector)
- [View offer](https://bargainpostbox.co.uk/visit/safeliveo-co03-carbon-monoxide-detector)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Safeliveo
- Model: CO03
- Category: Electronics > Smart Home & Security > Alarms & Sensors
- Price: 12.71 GBP
- Previous price: 14.99 GBP
- Discount: 15%
- Price checked: 2026-11-12T15:09:51.820Z
- Rating: 4.7 / 5
- Reviews: 770

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Digital display shows CO readings, with a stated minimum reading of 10 ppm.
- The listing claims a 10-year electrochemical sensor life and includes a CO peak-value memory feature.
- The alarm uses replaceable AA batteries. The listing states battery life of 1 years.
- Standby LED indication can be activated or deactivated using the Test/Mute button.
- A low-level warning is specified for 20 ppm sustained for 35 minutes.

## Pros

- A digital numerical display makes the reported CO level visible without relying on the audible alarm alone.
- Replaceable batteries and supplied mounting screws support battery replacement and wall installation.
- Compact listed dimensions and free-standing placement allow use without wall mounting.

## Specifications

### Identity
- Brand: Safeliveo
- Model: CO03
- Style: Standalone
- Colour: White
### Power and battery
- Power configuration: Battery Powered
- Battery type and quantity: 2 × AA alkaline batteries
- Claimed battery life: 1 years
### Detection and alerts
- Sensor type: electrochemical sensor
- Claimed sensor life: 10-year lifespan
- Display minimum reading: 10 ppm
- Low-level warning condition: 20 ppm and persists for 35 minutes
- Listed detection range: 20 to 40 square meters
- Audible alarm: exceeding 85dB
- Compliance claim: BS EN 50291-1: 2018
### Dimensions and installation
- Dimensions: 60 × 105 × 32.7 mm
- Weight listed: 120 Grams
- Placement: free standing on any surface, or can be wall mounted with the included screws
### Other features
- Standby indicator: flashes a green LED once every 60 seconds while in standby mode

## Before you buy

- The listing claims compliance with BS EN 50291-1: 2018 and describes an alarm above 85dB. These are manufacturer claims, not independently verified here. The stated coverage range and portability wording do not establish suitability for every room or travel setup.

## In the box

- 1 × CO detector (Included)
- 1 × screw set (Included)
- User manual (Included)
- 2 × AA alkaline batteries (Included)

## A good fit for

- Buyers wanting a standalone CO alarm with a visible numerical reading as well as an audible alert.
- Households preferring replaceable AA batteries and a choice of free-standing or wall-mounted placement.
- People who want the listing's stated low-level warning and CO peak-value memory features.

## Less suited to

- Buyers seeking a connected or interconnected alarm system, since the listing describes a standalone unit.
- Buyers who require independently verified certification or performance evidence before choosing an alarm.

## Customer feedback

Customer feedback describes the detector as compact and easy to set up, with customers appreciating its numerical CO display and loud alarm. These reported impressions are relevant to a standalone unit intended to show readings and alert locally. The feedback summary also praises its perceived effectiveness and value, but aggregate ratings and reported impressions do not independently establish detection accuracy or safety performance.
- Positive themes: Customers describe setup as easy and the unit as compact.
- Positive themes: Feedback highlights the numerical display and loud sound.
- Positive themes: Customers report positive impressions of functionality and value.

## Frequently asked questions

### What batteries does the Safeliveo CO03 use?
The listing specifies two replaceable AA alkaline batteries and states a battery life of 1 years.
### Does it show carbon monoxide levels?
Yes. The listed digital display shows the current CO level, with a stated minimum reading of 10 ppm. The listing also describes CO peak-value memory.
### Can it be mounted on a wall?
The listing says it can stand freely on a surface or be wall mounted using the included screws.
### What does the low-level warning do?
The listing says it issues a low-level CO warning when concentration reaches 20 ppm and persists for 35 minutes.

## Alternative options

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- [X-Sense Portable Carbon Monoxide Detector for Travel & Home, XC0N-SR,1-Pack \| Replaceable-Battery-Powered CO Alarm with LCD Display and Peak Level Memory](https://bargainpostbox.co.uk/visit/safeliveo-co03-carbon-monoxide-detector)
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- [Heiman Carbon Monoxide Detector, EN 50291 Certified, 10-Year Life CO Alarm Detector with Digital Display, 5-Year Replaceable AA Battery Included](https://bargainpostbox.co.uk/visit/safeliveo-co03-carbon-monoxide-detector)
- [XINDUM Carbon Monoxide Detector 10-Year Battery LCD Display CE White 1Pack \| EN50291 certified, Electrochemical sensor, 85dB alarm, mount wall/Stand, Portable Carbon Monoxide Alarm for home , Standalone](https://bargainpostbox.co.uk/visit/xindum-co12-carbon-monoxide-detector-lcd)
- [SECAIR Carbon Monoxide Detector for Home,ZM-ZL2211S,CO Alarm 10-Year Sensor with LCD Digital Display,CO Alarm 85dB with Replaceable Batteries,EN 50291 Certified CO Detector for Home - 1 Pack](https://bargainpostbox.co.uk/visit/safeliveo-co03-carbon-monoxide-detector)
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## Add-ons

- [2 Pack Smoke Alarms for Home – 10-Year Life Fire Alarms with 5-Year Replaceable Battery, EN14604 Certified Photoelectric Smoke Detector with Silence Button, LED Light, for Kitchen, Caravan, Office](https://bargainpostbox.co.uk/visit/safeliveo-co03-carbon-monoxide-detector)

## Images

![Safeliveo CO03 Carbon Monoxide Detector with Digital Display — 1](https://bargainpostbox.co.uk/i/HeEMs2lYVRMaEn3Nrq9CsuUUHIsqSBMth7cFHd1tih6zkPo99AbAPeB7rkZ5-9QR0AAKbLr219g-bBL1PqyGGHFkiAsRrm-h4geCk_fHEahavblONqU1QD10.jpg)

![Safeliveo CO03 Carbon Monoxide Detector with Digital Display — 2](https://bargainpostbox.co.uk/i/h3fMXMinrRP7wkR9oC6liy44gNEK6In9E4nXUoxS52qPqaai6OojpLf0lApAhSSvTBfO8KJatddrN4CpPkCrAKnys6kHEwUACQLlT1NoVuLMxlKTGnCYqYTD.jpg)

![Safeliveo CO03 Carbon Monoxide Detector with Digital Display — 3](https://bargainpostbox.co.uk/i/xiIQzBfoEiq9pRNWrSULLCwzj7uTpDvlYR80Y6ypNd94lK4NFj_ospX6Byyj70xUtIi2l2ri70bKUd7L-3NVMvnJVdBAMOJCWWFMKqp-El736qXvEK5onjvb.jpg)

![Safeliveo CO03 Carbon Monoxide Detector with Digital Display — 4](https://bargainpostbox.co.uk/i/-WNp-2J1HIDmCo5MLkdFptiiYp20tqm83LNtIqt0Ub8iHFd2l-Hui-q1vJ3GRxurZNr75gYzWUFywq35mJurYLutcd2W2RPVIOd5ACzPbnLNOXjJ1NPOiu08.jpg)

![Safeliveo CO03 Carbon Monoxide Detector with Digital Display — 5](https://bargainpostbox.co.uk/i/L-Y_gIEXh9BbGtSKFIEUm5viEjscYOH6qshHN7E5ob_LGomODutthrGpKN_RX-VKKg7II6nlTV5VdstEwOOcWqyzrg5QyARt4lUdkw_-YT7_MzlnCyVFKFOl.jpg)

![Safeliveo CO03 Carbon Monoxide Detector with Digital Display — 6](https://bargainpostbox.co.uk/i/ptBhuP2HbchcWizVI8CjoPolZ-q-yl16fGnlaEpvJITHdizxiu3jtBeVPerJBKmDk9hSXpxQUVzX-xhkICqE-7nd06NL8ejPXGgljbjyavsK1txrerp8uQx2.jpg)

![Safeliveo CO03 Carbon Monoxide Detector with Digital Display — 7](https://bargainpostbox.co.uk/i/Eq3d1Nkuiegsca4Ba8kmzAh1UTUuQUarO2s9sJfy9IVVQ_Wk5l80KG-10GCOyXgj8EP_g4pyGYEQeqTTTGsZpg93sTwlsRhbQcadeUxivCDLrmJ2cvod3Lj6.jpg)