Best Gas Detectors & Alarms of 2025

"I found this gas tester easy to use and it saved me a plumber's call! I followed the instructions and it performed beautifully. Five stars!"

"After noticing a slight smell of gas, I ordered this detector and it arrived the next day. I discovered a leak in the water heater connection. I'm very glad I bought this gas detector!"

"This gas detector has surpassed my expectations. It's sensitive enough to access hard-to-reach areas, and the alarm alerts me to potential issues. The screen is a little tricky to see in bright sunlight, but it's still discernible."

"I’m really happy with this device. After discovering higher radon levels in my home, I purchased the Airthings radon detector. It confirmed that our readings were above safe limits and allowed us to take action quickly. The accuracy of the device is impressive, matching results from independent tests. I appreciate how simple it is to use, and the long battery life has been great!"

"I find this radon detector to be excellent. It’s very straightforward to operate and provides solid readings. After over six months of use, my battery is still going strong. I was recommended this specific model by my heating and cooling company, and I’m really pleased with my purchase!"

"No issues with this detector. Just make sure to read the instructions because it doesn't provide readings until after one day. This device averages its results over time, which I find reliable for measuring radon levels in my home. I would totally recommend it."

"I recently got the TopTes PT199 Natural Gas Leak Detector, and I’m thoroughly impressed with its performance. This compact and user-friendly tool has quickly become essential for ensuring safety in my home. The audible and visual alarms provide clear warnings, offering peace of mind. I appreciate how accurately it detects even the smallest traces of gas, and the easy-to-read LCD screen makes monitoring gas levels straightforward. Overall, I highly recommend it for anyone concerned about gas safety."

"This small gas leak detector is something every homeowner should have. It’s inexpensive and easy to use, and it could really help avoid major problems. When my family smelled gas, I tested my oven and stove with this device, and it confidently confirmed there was no leak. Super great to have, I believe everyone should keep one on hand!"

"I bought this product to check the gas connections in my RV, and it’s indispensable! It’s practical and very easy to use. I even tested it with a lighter, and it worked perfectly! I definitely recommend it!"

"I really like this small sensor. It's easy to use after reading the instructions. I started with a very sensitive setting, which helped me detect a gas leak from a distance. By pushing the button, I could adjust sensitivity to pinpoint the source of the leak. It helped me find exactly where on the hose I had a leak, and I'm very happy with it."

"I was pleasantly surprised by the quality of this gas leak check pen given its affordable price. The instruction manual is straightforward, and it comes with two Duracell batteries. It detected no gas in our living room but alarmed when we turned on the stove without lighting it. I'm quite pleased with my purchase."

"This detector was a lifesaver! It's incredibly sensitive and accurately detects gas leaks. The audible and visual alarms are impossible to miss. I love the compact design which makes it easy to use in any part of the house. It offers peace of mind, and I highly recommend it for ensuring safety!"

"I've had my share of unreliable gas detectors, but the PT-830S has truly impressed me. The 14-inch flexible probe is ideal for reaching tight spaces, and the color display is a significant upgrade from my previous model. I love the ability to customize alarm thresholds and switch between alert modes, especially the vibration feature for noisy environments. The battery life lasts a full workday, and I prefer USB-C charging to disposable batteries. My only minor issues are that the screen can be hard to read in direct sunlight, and the user manual could be clearer about advanced features. For professional-grade detectors, this is one of the best values I've found."

"I was pleasantly surprised by how well this kit worked right out of the box; it arrived fully charged and ready to go. I tested it on my propane line connected to an indoor fireplace, and while I could detect the propane smell before the sensor did, once it detected the gas, it displayed the concentration in real time. There is a slight delay in detection, but it accurately shows levels as they change. The build quality is solid, and at $40, it’s definitely worth the investment."

"This gadget is one I wasn't sure I'd need, but I found a quick use for it. After addressing a gas fridge issue in my Dad's caravan, I used the detector to check for leaks post-installation. It comes in a protective case and has a long sensor head that fits into tight spots. Although it takes a bit to boot up, once ready, it's straightforward to use. I’m not sure when I’ll need it next, but I’m glad to have it on hand."

"I found the installation process to be very straightforward. I was able to remove the old detector and replace it in under five minutes. The connections were easy to handle!"

"After using this alarm for several months, I can confidently say it works as intended. I accidentally left a stove burner on, and it went off within minutes. It even reacts to cleaning products, which is reassuring for safety."

"Replacing my old propane detector in the RV was a breeze. The installation was simple, and I appreciate the detailed notes about CO and propane gases that came with it."

"I found the installation to be super easy, and it really gives me peace of mind at night."

"I just set this up for my new home with gas appliances. The test alarm is impressively loud and installation was straightforward."

"I was initially puzzled when the alarm didn't go off while testing it near the oven. However, I learned that I may not have given it enough time to detect the gas properly. Despite this, I trust that it's a reliable device."

"I kept smelling gas at my Grandmother's house, and it was concerning that she couldn't smell it. Thanks to this gas meter, I convinced the technician to continue searching, and he eventually found the leak. I'm very thankful it helped keep Grammie's house safe!"

"I purchased the TopTes Guard-101 Multi Gas Detector as a secondary device to check air quality. It’s extremely simple to operate with just three buttons, and it showed accurate oxygen levels outdoors. I tested it with propane, and it quickly displayed the gas concentration. This device is reliable for a homeowner like me!"

"This device is an excellent addition to my PPE kit. It detects multiple gases and alerts me if thresholds are exceeded. The CO monitor is particularly useful for my indoor workshop, ensuring I'm safe from carbon monoxide. I highly recommend it for anyone working in environments with potential gas exposure!"

"This gas leak detector finds it all. I would buy many, MANY more if money would allow. It detects everything! It has saved us multiple times, especially with my kids turning on the gas stove. After a particularly cheesy dinner and a milkshake, it went off like a fire alarm! I even recreated experiments for fun, and it went off again! This product is a lifesaver and hilarious at the same time. 5 stars for effectiveness and entertainment!"

"I love this product! If I could give it a ten, I would. It alerted us when our gas stove was left on, which could have been disastrous. It's extremely reliable, and the noise is loud enough to wake you up, no matter where you are in the house. I've got them on both floors for extra protection."

"I bought this product because I kept smelling gas in our bedroom. To my surprise, the detector went off and scored a 3. I was skeptical but called the gas board, and they discovered a significant gas leak. If I hadn't bought this detector, it might not have ended well."

“I was skeptical about a gas detector under several hundred dollars, but I was proven wrong. The Klein Gas Leak Detector is a top-notch, life-saving tool! I had a difficult leak to locate, but with this detector, I pinpointed it within 30 seconds. My family was so relieved when we found the exact cause and fixed it immediately. It paid for itself on the first use.”

“After moving into a new house, I occasionally caught a whiff of natural gas near the laundry area. I got this detector and found a leak, but not behind the dryer as I suspected. It turned out to be the gas cutoff valve for the fireplace. I had a plumber fix it, and even after that, the detector showed a small amount initially. I appreciated that it detected even low levels, but I wish the sensor lasted longer than five to seven years.”

“I purchased this sensor for an oven-range gas leak. It was so sensitive that I discovered a second gas leak I was unaware of. The long wand made it easy to access tight spots. The instrument is intuitive and easy to learn how to use, which I really liked.”