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CO12 2Pack with LCD Digital Display Carbon Monoxide Alarm | 10-Year Battery TUV
Monitor the silent killer with the CO12 standalone CO detector. Features a digital LCD display, 10-year sealed lithium battery, and TÜV Rheinland certification.
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£36.90 GBP
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Regular price
£49.99 GBP
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£36.90 GBP
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CO12 2Pack with LCD Digital Display Carbon Monoxide Alarm | 10-Year Battery TUV
Sale price
£36.90 GBP
Regular price
£49.99 GBP
Regular price
£36.90 GBP
Unit price
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Description
The CO12 is a maintenance-free carbon monoxide alarm designed for long-term, worry-free protection. It comes with a built-in 3V sealed lithium battery, so you simply install it and enjoy up to 10 years of continuous operation - no battery changes needed.
The LCD screen displays real-time CO concentration from 30 to 999 ppm, giving you clear visibility of air quality at a glance. A single 'TEST/SILENCE' button lets you test the unit or mute unwanted alarms, with approximately 9 minutes of silence per activation. A slide switch makes powering the device on and off quick and easy.
The CO12 supports three installation methods - screw-mounted bracket, adhesive pad for damage-free mounting, or freestanding tabletop placement - making it adaptable to any space. Certified to EN 50291-1:2018, it is suitable for homes, RVs, motorhomes, caravans and boats.
🔥 Core Benefits & Key Features
- CE Certified: CE certified, portable carbon monoxide detector that complies with EN50291 standard. It can accurately detect the concentration level of CO while minimizing false alarms; it can quickly and sensitively output an alarm sound of up to 85dB to protect the safety of your life and property. The product is trustworthy.
- 10 Year Battery Life: Built-in lithium battery, no wiring required. It can be used for 10 years in standby mode, providing you with long-term safety protection and saving you the trouble of frequent battery replacement.
- Mute and Test Button: The 'Test/Mute' button allows you to test the alarm weekly, detect whether the device is working properly, and easily silence the alarm in the event of a false alarm; the CO alarm will be silent for 9 minutes and return to normal mode after 9 minutes.
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Easy to Install: This carbon monoxide detector can stand directly on the table; you can also use the provided screws and anchor plugs to quickly and easily install it anywhere you want. This lightweight and convenient CO alarm is ideal for home and travel.
📦 What’s in the Box?
- 2 × CO012 Standalone Carbon Monoxide Alarm
- 2 × Double-sided Adhesive Pad
- 2 × Mounting Bracket & Screw Expansion Kit
- 1 × User Manual Instruction Book
💡 Frequently Asked Questions (FAQ)
Q: How loud is the sounder?
A: More than 85 dB(A) at 3 m, which meets the UK expectation for a bedroom-accessible warning and is audible through interior doors.
Q: Can a landlord fit this in an HMO or a multi-let house?
A: Yes. The tamper-proof sealed cell means a tenant cannot remove the power source, and the end-of-life marker gives you a dated, auditable record for your fire-risk assessment and insurance renewal.
Q: How should the sealed lithium cell be disposed of?
A: Take the whole unit to a UK battery recycling point or a WEEE collection site - never put it in household waste. Because the cell cannot be removed, recycling is done through the-device route rather than cell-by-cell.
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Features
Live LCD Readout
Non-removable Battery
85 dB Alarm
High-Precision Detection
10-Year Lifespan
Safety Certified
01 / Fit and forget
One sealed cell.
One sealed cell.
A decade of silence.
Inside the calm white housing sits a lithium cell built to outlast ten years. Slide it on, let it self-check, and walk away - no batteries to buy, no ladder, no excuses.
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✓
A battery you can't remove
The 3 V 1500 mAh cell is sealed inside - a tenant can't pull it to silence the alarm.
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✓
A clear power state
Slide the ON/OFF switch; digits scroll 000-999 three times for self-check. Factory OFF, zero drain in storage.
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✓
A readout you can read
The LCD shows live CO in ppm, so the invisible gas finally has a number.
02 / One button, clear answers
One button.
One button.
Every answer.
'TEST/SILENCE' handles it all: press to test (loud = OK), press in alarm to hush for ≈9 minutes. After 9 minutes, the device will automatically reset. If the CO concentration is still at the alarm level after 9 minutes, the alarm will sound again.
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✓
Test weekly
One press, a loud beep confirms the sensor and sounder are alive. Tie it to your gas safety check.
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✓
Hush with care
≈9-minute silence below 300 ppm. The unit keeps watching - never ignore an alarm.
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✓
Know the end is near
At 10 years it beeps 3×/30 s and shows 'End'. Whole-unit replacement, no reset.
A place in everyday life
Application Scene
UK guidance expects a CO alarm wherever there's a fuel-burning device - and in Scotland, interlinked smoke alarms are required by law, so a CO alarm is your invisible-gas backstop.
Bedroom
Rest comes first
Keep it within 150 mm-3 m of the floor and clear of curtains. A bedroom alarm is your night-time backstop.
By the appliance
By the appliance
Place it in the room with the boiler or solid-fuel fire, at least 1.5 m from the heat source and away from cooking steam.
Living room
Made for everyday moments
The room you use most. Keep it away from fireplaces and sources of nuisance - and out of the bathroom.
A more considered home
Install CO Detector
Install CO Detector
A few simple steps.
01
Find the right place
In the room with the fuel appliance, 150 mm-3 m above the floor. Avoid bathrooms, vents and dead-air corners.
02
Fix it - three ways
Screw the bracket, peel-and-press the adhesive pad, or set it on the desk stand. Rental-friendly, no drilling.
03
Power on & self-check
Slide the switch to 'ON'; digits scroll 000-999 three times, then settle. Factory OFF in the box.
04
Test, then make a habit
Press 'TEST/SILENCE': a loud beep = OK. Test weekly and after any long absence.
05
End of life
At 10 years the unit beeps 3×/30 s and shows E - replace the whole alarm. The sealed cell can't be opened.
way to install
Install CO12 in the correct position
Always follow the product manual and local gas-safety requirements; these take priority over this guide. A CO alarm does not replace an escape plan or an annual appliance check.
The practical details
Specifications
| Type | Standalone electrochemical carbon monoxide alarm |
| Model | CO12 |
| Power supply | DC 3 V · built-in 1500 mAh sealed lithium (non-replaceable) |
| Battery / unit life | Sealed lithium >10 years · end-of-life at 10 years |
| Low-battery threshold | 2.6 ± 0.1 VDC |
| Current draw | ≤ 12 µA standby · ≤ 50 mA alarm |
| Alarm output | > 85 dB(A) at 3 m |
| Sensor | Electrochemical, 10-year life |
| Display / accuracy | 30-999 ppm · ±30% |
| CO sensitivity | 50 ppm 60-90 min · 100 ppm 10-40 min · 300 ppm 1-3 min |
| Silence time | ≈ 9 minutes (cannot silence above 300 ppm) |
| Controls | Slide 'ON/OFF' switch · central 'TEST/SILENCE' button |
| Temperature / humidity | 0°C to +40°C · 15-95% RH (non-condensing) |
| Mounting | Screw bracket · adhesive pad · desk stand |
| Suitable | Homes, caravans, motorhomes, boats |
| Certification | EN 50291-1:2018 |
A little more clarity
FAQs
A considered choice starts with the right information.
Visit the home safety guideFit one in every room with a fuel-burning appliance (boiler, gas fire, wood stove), plus a bedroom. UK guidance expects a CO alarm wherever there's a combustion source; larger homes and HMOs may need several.
Yes - the adhesive pad sticks to plaster, tile or gloss paint, and the desk stand sits on a worktop or boat dashboard. Screws only where the wall allows.
No. The lithium cell is sealed inside the housing, so it can't be pulled to silence the alarm - exactly why landlords specify CO12 for let properties and HMOs.
At 10 years it beeps 3× every 30 s and shows 'End' on the LCD. There is no reset - replace the whole unit. The sealed cell can't be opened.
No. CO12 responds to carbon monoxide, not water vapour, so steam alone won't alarm it. Keep it out of shower rooms and saunas anyway to protect the sensor over time.
Yes - CO12 is certified to EN 50291-1:2018. Copies of the certificate are available on request, and full details are listed in the Specifications section.