The 4-in-1 Detector that Monitors Carbon Monoxide and Natural Gas with Live Readings, so you Stop Relying on a Green Light
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The 4-in-1 Detector that Monitors Carbon Monoxide and Natural Gas with Live Readings, so you Stop Relying on a Green Light

USA and UK Approved Certification - UL & CSA
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Displays both readings on a plug-in display
EXPLORE DETECTOR+
Lifetime Warranty

THE TECHNOLOGY BEHIND THE REASSURANCE

Two different threats need more than one ordinary alarm. Detector+ allows you to see more, understand more and rely less on guesswork.

Monitor Two Gas Threats With One Device

Detector+ uses an intelligent detection chip to continuously monitor carbon monoxide and natural gas.

See Live Readings — Not Just a Green Light

Watch the display cycle between carbon monoxide and natural-gas readings.

Understand What the Lights Mean

Separate POWER, ALARM and FAULT indicators help you distinguish normal operation from a warning or detected fault.

Hear the Warning When It Matters

An 85+ dB sound-and-light alarm activates when carbon monoxide or natural gas reaches alarm conditions.

Check More Than Gas Levels

View temperature and humidity alongside clear power, alarm and fault indicators.

Won't False-Alarm Whilst Cooking

Detector+ monitors carbon monoxide and natural gas—not smoke or steam.

Plug In Without Tools or Wiring

Connect Detector+ to a compatible wall outlet, allow approximately 200 seconds for preparation and monitoring begins.

Lifetime warranty
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Lifetime warranty
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WHAT THE GREEN LIGHT DOESN'T TELL YOU

A green light doesn't mean zero carbon monoxide.

A typical CO alarm is designed to sound when carbon monoxide (CO) reaches certain levels for a certain length of time. Its green power light alone doesn't show you the CO concentration in the room.

STANDARD CO ALARM

Wait for the warning

At these test concentrations, a compliant alarm may remain silent for the times shown:

70 ppmAlarm within 60–240 min
150 ppmAlarm within 10–50 min
400 ppmAlarm within 4–15 min
REXORER DETECTOR+

See the reading too.

Detector+ alternates the displayed CO and natural gas readings, giving you numbers to check instead of relying on a green light alone.

Rexorer Detector+ showing its carbon monoxide and natural gas readings

An audible alarm still matters. Follow the device manual for alarm behaviour, placement and what to do if it sounds.

Explore Detector+

ppm = parts per million. Times refer to sustained CO concentrations in standardised tests; actual readings and alarm behaviour vary by device and conditions. A displayed reading is not an all clear. If an alarm sounds or you suspect CO exposure, leave the property and contact emergency services.

KNOW WHAT YOU'RE PROTECTING AGAINST

Two gas threats. Two very different dangers.

Carbon monoxide can harm the people inside your home. A natural gas leak can create a fire or explosion risk.

Carbon monoxide

Invisible. Odourless. Poisonous when inhaled.

  • Headache and dizzinessEarly symptoms can feel like an ordinary illness.
  • Confusion or unconsciousnessExposure can make it harder to recognise the danger or get out.
  • Serious harm or deathSevere poisoning can injure the brain and heart.

Natural gas

Flammable. A leak can become a serious home hazard.

  • Gas can build up indoorsA leak may continue while people are asleep or away.
  • Fire or explosionAccumulated gas can ignite if it meets a spark or flame.
  • Injuries and home damageIgnition can cause burns and serious structural damage.

A CO-only alarm does not detect a natural gas leak. Detector+ monitors both threats and shows their readings one after the other.

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KNOW WHAT THE NUMBERS MEAN

What Different Levels Can Mean

Carbon monoxide affects your body. Natural gas creates a fire and explosion risk. Here’s what rising readings can indicate.

HEALTH EFFECTS

Carbon Monoxide (PPM)

Carbon monoxide can affect the body before symptoms feel serious. Concentration and exposure time both matter.

0–29 PPM

Low reading

Symptoms are unlikely for most people, but persistent unexplained CO should still be investigated.

30–69 PPM

Few obvious symptoms

CO may build without obvious warning. People with certain health conditions can be affected sooner.

70–149 PPM

Symptoms may appear

Headache, fatigue and nausea may develop with sustained exposure.

150+ PPM

Serious danger

Disorientation, unconsciousness and death are possible as concentration and exposure time rise.

Symptoms vary by person and exposure time. Never use symptoms alone to decide whether the air is safe.

FIRE & EXPLOSION RISK

Natural Gas (%LEL)

Natural gas is primarily a fire and explosion hazard. %LEL shows progress toward the Lower Explosive Limit.

Below 1,000 PPM

Below 2% LEL

Low detected level. Continue monitoring an unexplained or persistent reading.

1,000–2,000 PPM

2–4% LEL

Natural gas is present and increasing. Move away from the suspected source and follow gas-safety guidance.

2,000–3,000 PPM

4–6% LEL

Elevated buildup. Avoid flames or electrical switches and move to safety.

Above 3,000 PPM

Above 6% LEL

Detector+ alarm condition. Leave the area and contact your gas provider or emergency services from outside.

%LEL is progress toward the Lower Explosive Limit—not the percentage of gas in the room.

If an alarm sounds or you suspect a leak, leave immediately.

Do not operate electrical switches or create a flame. Contact emergency services or your gas provider from a safe location.

Who It’s Built For

Who Should Own a Detector+?

If your home uses fuel-burning appliances and you’re responsible for keeping others safe—Detector+ is built for you.

Parents & Families

Protection for the rooms where the people you love sleep.

Homes That Use Gas

For homes with a stove, boiler, furnace, water heater or fireplace.

Older Homes

Added reassurance around ageing pipes, fittings and appliances.

Renters & New Homeowners

Know what’s happening around appliances and safety systems you didn’t choose.

Ageing Parents & Loved Ones

Simple plug-in monitoring with clear readings they can easily check.

Lifetime Warranty

Your Detector+ is protected against covered manufacturing faults for its stated service life, subject to the warranty terms.

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Rated 4.8/5 by 1,898 as of August 2026

Lifetime Warranty

Your Detector+ is protected against covered manufacturing faults for its stated service life, subject to the warranty terms.

CLAIM NOW
Certified
Free Shipping
Rated 4.8/5 by 1,898 as of August 2026