SENSYX Rechargeable HVAC Refrigerant Leak Detector, Halogen Freon Sniffer, Air Conditioning Detection, Automotive Gas Finder (SFD201 Refrigerant&Combustible Gas Detector)

Instructions on Chinese, not in English

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.

Lo probé durante varias semanas y funciona de manera estable. La instalación fue sencilla y no tuve que invertir mucho tiempo para configurarlo. La batería dura lo suficiente para un uso normal y la calidad de los materiales me parece adecuada para el precio. Lo recomendaría a quienes busquen una opción confiable sin gastar demasiado.

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.

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.