SENSYX Rechargeable Refrigerant & Combustible Gas Leak Detector SFD201

It's a good refrigerant, gas leak detector. However you have to turn it on in the same area but not too near to the A/C or stove that you are checking. I used it to check if the evaporator coil of the mini split inside my room is leaking. At first it gave me false positive because I turned it on outside the house, I misunderstood the instruction I thought it needs fresh air outside as the base reading. When I went inside the house it beeped right away and it also has a warm up period of 30 seconds I believe. You can turn off the sound (beeping) if it annoys you. It detects the refrigerant or gas but it won't tell you what kind it is. After that I turn it on in the same room as the evaporator coil and it didn't detected any leaks, I thought it might not be working properly so I breathe into the nozzle and it detected the CO2. So I guess it's working properly. It's rechargeable so you don't have to worry about batteries and it also comes with a case. I only bought it for peace of mind I don't wanna breathe in refrigerant because they're basically poison. Thanks.

It works very well!If you want to test how it works just breathe into the end! It's picks up your exhaled carbon dioxide!Easy to use.Turn it on - wait for the 30 second warm up.... Put the wand where you want to test and see what it finds.I was wanting to see if there was any freon leaks at work because I get headaches often.No leaks ...so I can rule that one out!!!!Great for checking gas grills too!

Works almost too good.I picks up just about anything , its very sensitive. But that is a good thing.For the price it works great. Battery life is outstanding 👌

Detects leaks quickly and is easy to use. Rechargeable battery is convenient, and the sensor is fairly sensitive. A little slower on very small leaks, but overall a solid tool for HVAC work.

It works really well. Detects gasses almost immediately. Great for finding propane leaks, air conditioner leaks or other potentially dangerous leaks. It does take a few seconds for it to stop beeping once it starts though so take it away from the offending gas and let it breathe clean air for a few seconds.

Had a few aggravating leaks in our car's AC system. Tried the usual tricks of finding leaks like using spray bottle with soapy water and others. (Did not use the fluorescent dye because of all the negatives about using this technique.)After googling refrigerant testers and finding dozens of selections, I decided to pick a price range and a four+ star rating. Followed that up by reading the reviews of those testers that fell into my selected rating scale.You can use this tester almost right out of the box. It does come with its own charging cord that you plug into any one of the phone chargers you have laying around. There is a booklet that comes with the tester that gives clear easy to understand directions on its use.I must place a warning some where in this review! Please read and follow through with all safety warnings. Safety glasses are a must. Leather gloves are a must. The refrigerant will freeze your cornea in an instant! The refrigerant will cause frostbite on any exposed skin. Think before you start testing!!!After putting on my safety glasses and leather gloves I turned on the tester and began testing all the connections in the cooling system. At two different locations the tester went crazy indicating the presence of leaks.Fortunately the leaks were occurring at the two connection ports that are used to add refrigerant to the system.I read a suggestion in one of the reviews which stated it would be a good idea purchase the port valve kits that are also available at Amazon.Long story short! After replacing the valve parts and refilling the refrigerant in the cars ac we are driving very cool these days!This tester was well worth the money. If it works as well with the other gases as it did with the ac refrigerant than this tester was a great bargain!

Works really well, and I like that it's rechargeable, "no batteries!", and a great price

Works great, awesome upgrade from my old 30 year old one. I wish the probe stem was a little longer, but happy otherwise.