10 Best Carbon Monoxide Meters
for December 2023

The CO Tester is an easy-to-use gas detector that's ideal for use at home or in outdoor environments. It features a wide measuring range, a low CO concentration level (0.01%), and a large display. The display shows CO gas concentrations as either parts per million (ppm) or percent (%), and you can set it to display either number. The tester's also has a wide temperature range (-40 to 158 degrees Fahrenheit), so it won't freeze or overheat in cold temperatures. The tester's large display is easy to read, so it's ideal for working in dark or dimly lit environments. The tester's battery lasts up to 60 days, and it's powered by a USB cord. The tester's battery can be replaced easily, and it comes with a replacement battery and a case, so it's easy to maintain. The tester's display also records CO concentrations in parts per million (ppm) or percent (%), so you can record your results and monitor them over time. It can also display temperatures in either degrees Celsius (C) or Fahrenheit (F). The tester's battery also powers its light, which shines red when CO gas is detected. Some testers produce a loud beeping sound when CO gas is detected, but the tester's produces a subtle beeping sound, so it's quiet enough to use in quiet environments.

Klein Tools' ET110 Carbon Monoxide (CO) Meter is a capable detector, but it's best suited for homeowners and renters rather than for professionals. It produces clear, easy-to-read CO measurements, and the built-in alarm is loud enough to rouse you from your sleep. The tester also functions well as a detector, and it's easy to pair the tester with your smartphone using the included Bluetooth LE adapter. On the downside, the tester doesn't offer much in terms of features. There's no backlight, there's no test mode, and there's no test filter. The tester does include a battery-saving auto-off feature, but it's a bit annoying that the tester repeatedly shuts off after 20 minutes of inactivity. Overall, the ET110 is a reliable detector, and it provides solid CO readings and alerts. It's also small enough to fit into a pocket or purse, and it has a carrying pouch and batteries, so it's easy to carry.

The CO gas detector is a portable detector with a well-designed body and a user-friendly interface. It's small and light weight, easy to carry and operate. With a 1000ppm measuring range, the CO gas detector can continuously monitor the CO gas concentration in the surrounding environment. When the gas concentration reaches a level as low as 1000ppm, the CO gas detector will alarm and display the warning. The CO gas detector features a long battery life and comes with a 9V battery and a USB cable for charging. The CO gas detector has a wide measuring range, and measures the ambient temperature in 2 temperature units (C and F). With a 3-point calibration function, it can quickly calibrate the internal CO sensor. The CO gas detector not only can monitor the level of CO gas, but also measures the humidity. With a large LCD screen, the CO gas detector is easy to read.

This unit packs a lot of features into a compact, lightweight design. The display is easy to read, and it features several buttons for quickly calibrating the unit and switching between distances, temperatures, and alarm settings. The proximity sensor is sensitive enough to detect CO at very low concentrations, and it can detect CO in environments from 0 to 1000 ppm, which is more than enough to detect CO in any home. The display is bright enough to read in sunlight, and the unit has a backlight that can be turned on for low-light conditions. The unit is small enough to fit into a shirt pocket, and it has a carry strap making it easy to transport. The calibration button is easy to find and press, and the unit has three memory buttons that store the calibration settings for three different users. The sensor has a built-in battery, so it does not need to be charged. The CO detector's accuracy is about 1 ppm, which is accurate enough to detect CO leaks in typical home environments, and the unit's accuracy never dropped during our testing period.

The CO Meter+ is a solid choice for anyone looking to monitor CO levels in their home or office, although it has limitations. The CO Meter+ has a wide measuring range, covering both ambient and carbon monoxide levels, and with its long probe, you can easily monitor air leaks in hard-to-reach places. We found that its accuracy is quite good, with an error of only 5% at 1% resolution. In addition, the CO Meter+'s response time is very fast, and the display is easy to read. The biggest drawback, however, is the fact that its display only shows CO levels, and it can't display ambient temperatures. The CO Meter+ also only supports one measurement mode (CO concentration), and it doesn't include an alarm clock. We also found that the CO Meter+'s battery only lasts about 10 hours, which is a bit short. That being said, though, the CO Meter+'s other features, like its long probe, good accuracy, and fast response time, make this meter worth considering, and it's the best CO meter we've tested.

The ANPIGGY 0.4ppm 0.1% Carbon Monoxide Gas (CO) Detector is a reliable instrument that can measure CO gas level, and is very easy to use. The detector is accurate, and can detect the CO gas level within 0.4ppm and 0.1%. The response time is 0.05 seconds, and the sound and light warning work when the CO level reaches the level of the warning. The detector has a wide measuring range:the ambient temperature can be measured in 2 temperature units (C and F). The detector has a powerful function:can continuously monitor the CO gas concentration in the surrounding environment. The detector can set concentration of warning value. The detector has instruction in the packaging, and it can be used by users from 12 years old. The detector is CE and ROHS certified, and has passed 3C certification.

Carbon monoxide isn't something most people worry about until it's a problem. But when carbon monoxide gas is accidentally released or is leaking from a stove, water heater, furnace, or vents, it can be deadly. Carbon monoxide is odorless and colorless, so it can poison you before you even realize it's there. The carbon monoxide detector we tested was sensitive enough to notice even the smallest CO leaks, and the built-in alarm was loud enough to notify you if the CO level in the area goes above 0.5 parts per million (ppm). The alarm was loud enough to warn you before you risked even having to breathe in the gas. The carbon monoxide meter also measured temperature, and it's fairly accurate at measuring temperature in Celsius and Fahrenheit. The carbon monoxide meter is made of plastic, but it looks and feels sturdy. The buttons are large and clearly marked, and there's a bright, one-color display. The carbon monoxide meter comes with batteries, and it's easy to set up: just insert the batteries, and you're good to go. We also liked the included hard carrying case, which makes it easy to store the carbon monoxide meter and carry with you. The carbon monoxide meter is inexpensive, and it's a useful tool to have around the house.

This CO detector is an excellent choice for homes or businesses with gas appliances. It can detect both CO and CO2, and it can also measure temperature. It detects both toxic and flammable gases. The sensor is highly sensitive and can detect CO gas at lower levels than many other models we tested. It has a long battery life and you can use both alkaline and lithium batteries. The sensor has a 1% resolution, which is better than many competing models we tested. The unit is compact and portable, and it provides clear, easy-to-read readings on both a large black-and-white LCD screen and a small, color LCD status display. The display also shows temperature in both C and F units. The detector's buttons are large and easy to use. The detector's large display makes it easy to read in dim light, and it's easy to read in direct sunlight, too. The readouts are also easy to interpret, with clear, readable text, and the unit's button layout is intuitive. The detector's alarm is loud enough to be heard in a hallway, and the automatic shut-off feature ensures peace of mind. The detector's auto power-off function is convenient and useful, and the unit comes with a sturdy travel case. The detector has a one-year warranty, which is longer than many competing models we tested.

The HGIH Portable Portable Carbon Monoxide Gas Detector is an accurate, reliable, and easy-to-use detector. It has a large display, a solid build, and an easy-to-use interface. The detector's sound and light alarm works well, and it's loud enough to hear over background noise. The HGIH detector consistently detected CO concentrations far below the 50PPM level required to meet Occupational Safety and Health Administration (OSHA) standards. The detector displayed a CO concentration of 300ppm above ambient levels, which nearly met OSHA's 300ppm exposure limit. The HGIH detector lasted more than 24 hours on a single battery charge, and it charged in roughly 2.5 hours. The detector has a user manual and a website with user guides, support, and video tutorials. The HGIH detector has a good warranty and is backed by an outstanding customer service network.

The Hytong Carbon Monoxide Detectors (HD-5002) is a handheld carbon monoxide meter for the detection of CO gas. It is easy to operate, easy to carry, and has a long flexible stainless steel probe to reach all areas. The audible semiconductor probe and auto fast warm-up ensure instant response, and the adjustable sensitivity helps you find small gas leaks, and decreases sensitivity to find larger explosive gas leaks. It is more sensitive than CO detectors with analog display. The detector is battery operated, and it comes with a 4.5 V 800 mAh Lithium battery. The detector can work continuously for 24 hours when the device is in standby mode, or for 60 minutes when the device is in use. The detector also has a built-in flashlight and voice alarm, and the light will be turned on (with the red led) when the detector detects CO gas. The voice alarm will shriek when excess CO gas is detected. The detector can detect CO gas from 0.1% to 3.0%. The detector has safety precautions, and it can quickly shut off the device, or dispose it of if there is an emergency. The detector has passed CE certification.