10 Best Natural Gas Alarms
for December 2023

This gas detector is a rugged, reliable device, and its speaker and digital display are loud enough to be heard over most environments. It was easy to install, and the display is easy to read. Our only complaint is that the device's design makes it difficult to shut off the gas detector's power in an emergency, so it's important to turn off the gas detector and unplug it before performing any maintenance on the gas line.

If you're looking to have a backup gas detector in your home, or you're looking to replace an existing one, the GasAlertOne is worth a look. The GasAlertOne is small enough to keep in a drawer or on your keychain, but powerful enough to detect hazardous levels of methane (which is what your gas stoves emit), propane, butane, and natural gas. The gas detector's display is easy to read, and the built-in speaker and flashing light make it simple to quickly find the source of the gas. In addition, the GasAlertOne is economical to run, using just 1 AA battery. And, unlike most gas detectors, it can run on propane or natural gas, and it won't require a battery if you run it on natural gas. The GasAlertOne's key feature, though, is its ability to detect combustible gases near its upper explosive limit (LEL). Most gas detectors only detect when a dangerous level of gas is present, so you have to pay close attention to the readout. The GasAlertOne, on the other hand, will notify you when gas level reaches LEL, and will also sound a loud alarm and flash red LED. This makes it easy to know when gas has reached a dangerous level, and to take measures to keep your family safe. The GasAlertOne's other features include a built-in flashlight, a 20-page eBook on gas and indoor air quality hazards, and automatic shut-off.

The DS-5 Duo II is a gas detector that can detect multiple gas types and provides a visual and audible alarm. The DS-5 Duo II is a dual alarm monitor, so it will sound an alarm if there is gas in one room, and another alarm if there is gas in another room. It also provides a digital readout of the gas concentration, so you can measure the gas concentration. The DS-5 Duo II has a 2-year warranty, and the customer service is very responsive. The DS-5 Duo II has lots of features, but the best feature is the 2-way audio communication (via a 3.5mm headphone jack), so you can communicate with someone in the room. However, the DS-5 Duo II is not as sensitive as the DF-4, so the DS-5 Duo II is a bit louder.

Of all the gas detectors we tested, the Eksahol Natural Gas Detector was the only one that detected all three types of gas -- natural gas, LPG, and methane -- in a smoke-free environment. The sensor is sensitive enough to sound an audible alarm even at very low concentrations of natural gas, and the system's sensitivity can be set in 1-ppm increments. The gas detector's detection range is 0-3,000 ppb, and it's designed to have a 10-minute reaction time. The detector's alarm is loud enough to be heard over loud background noise, and the built-in 120-VAC AC adapter lets you mount the detector indoors or outdoors. The detector's design makes it easy to install, and it's small enough (about 3.5 x 1.25 x 1 inch) to fit on bookshelves, countertops, or in tight spaces. The detector's display is intuitive and easy to read, and the built-in LED flashlight comes in handy if you accidentally set off the alarm on a dark night. The detector's smartphone app is free to download, and it scans the detector's geo-location and displays its status, history, and alarm history.

The Cazoner natural gas detector and propane alarm is a decent choice for homeowners and campers who want safe, reliable detection of natural gas and propane in the air. It has a large, easy-to-read screen that delivers real-time readings of the concentration of gases in the air, and an alarm that sounds when the concentration reaches a preset level. The alarm has 4 levels of sensitivity, and it's loud enough to rouse you, but won't wake a sleeping spouse or child. The detector has 10 programmable alarms, which can set off at 1, 5, 10, or 15 minutes, and can be reset manually at any time. The detector's sensor can detect methane, ethane, propane, and butane. It also has a 5-year warranty. The sensor works outdoors and indoors, and is rain-resistant.

The Greenfields Home Gas Alarm is the least expensive detector we tested, but it's also the cheapest unit that met our standards for sensitivity. The alarm works well for propane-based gas, natural gas, liquefied petroleum gas, and natural gas fuel. It has a simple, straightforward design and the most affordable alarm we tested, with sensitivity ranging from 0.05% to 45%. The alarm's display is bright and easy to read, and the unit's buttons are labeled clearly. The product's voice announcement and voice alarm are both loud and clear. The alarm also features a test button, which you can use to ensure the alarm is working properly. The Greenfields Home Gas Alarm is best suited for home use, where you don't need extreme sensitivity, and it's an excellent choice for apartments and small homes.

The Gas Detector is simple to use, and its alarm is loud enough to cut through the din of a false alarm. The monitor is bright and easy to read, and the sensors are easy to replace. The sensor cord is a little long, so it's easy enough to tuck it away in a closet or stow in a drawer. The sensors aren't as sensitive as those in our top pick, and this detector is prone to false alarms, especially at lower concentrations. The unit also ignores carbon monoxide, and it doesn't have a remote sensor. The alarm is sensitive enough to trigger when natural gas and propane are present in the same gas line, but the unit doesn't distinguish between them. The sensor also doesn't detect natural gas or propane in enclosed spaces, such as a garage, basement, or crawlspace. The Gas Detector requires three AAA batteries, which are not included.

The eGlo CNG detector is a solid choice for people looking for an inexpensive gas detector. It's hard to tell from the photograph, but the eGlo is encased in a strong metal mesh, so it's sturdy (in fact, it's heavier than most of the competition). The alarm is loud enough to be heard clearly over the sound of other noises, and it's adjustable. The display is large and easy to read, and it uses a digital LCD backlight, so it's safe to leave it on all the time. The eGlo's screen is also useful at night, as it displays the current gas level and battery status. The eGlo also features a convenient LED light, which is handy for finding the unit in a dark room. The eGlo's detection range is rated as 5% LEL to 95% LEL, which is a bit on the lower end, but it's plenty for detecting natural gas and propane. The eGlo also has an audible alarm, though it's louder than most detectors. The eGlo also monitors carbon monoxide, and it's capable of monitoring up to six sensors at once. The eGlo includes a USB charging cable, so you should have no problem charging the unit from a wall outlet. The eGlo comes with a one-year limited warranty.

The Cornesty WiFi Gas Leak Detector and Fire Alarm is a well-designed, reliable gas detector that outperforms its rivals in both accuracy and usability. It can detect methane in the air and, according to the company, it emits fewer false alarms than competing devices -- an important point, since methane gas is odorless. The device is portable and can be easily mounted on a wall or on the ceiling. The display is simple, easy to read, and displays the gas concentration and temperature. The device's bright screen is easy to read even in low-light conditions, and the display is easy to see even in the dark. The detector also has built-in sensors that detect smoke, fire, and more, so you can set it to detect carbon monoxide and automatically sound an alarm. The detector's alarm function works as advertised. It can connect to up to two mobile devices via WiFi and alerts users by text and/or alarm when a gas alarm is triggered, though alerts are not very customizable (you can only set alarms for natural gas or LPG gas, and there's no option to specify levels or types of gas). The alarm also doesn't work very well when humidity is high, and it's loud, which can make it annoying in quiet rooms. The detector is easy to set up, however, and the app is well-designed. The detector's price is competitive, and it's a great deal for what it offers.

The Amprobe 9-NT Home Natural Gas Detector is one of the most affordable gas detectors we've tested, and it's easy to use. It can detect natural gas, propane, and natural gas fuel, and it did so without a problem. It's powered by batteries, so you don't need an outlet to run it, and it has a probe that slides out of the unit, so you can monitor a gas leak from any room. The display is easy to read, and the unit has seven levels of sensitivity, so you can set it to 1, 2, or 3 alerts before you encounter a gas leak. The alerts are loud, and both the visual and audible signals are pretty strong. The alarm also stays on for 15 minutes after detecting a gas leak, so you'll have time to evacuate the room. The probe is sensitive enough to detect gas leaks as small as 1,000 PPM, and it's made of durable, flexible metal, so it won't break when you bend it. Amprobe claims that the unit can detect gas leaks from as little as 1% gas concentration, but we didn't find that to be the case.