Elitech Refrigerant Leak Detector AC Freon Leak Sniffer R22 R410A R134A R1234YF, WJL-6000S (5PCS)

The media could not be loaded.This sniffer is very sensitive. I am impressed at how well such a low-cost device is working. I was able to pinpoint a leak coming from the side cap on my expansion valve. As shown in the video, the four o-ring pipe connections are fine, but a leak on the far side of the valve is detected. To confirm, I put a bubble solution there and could hear & see the bubbles. There were no false alarms, but remember that refrigerant vapor is heaver than air, so it will tend to settle downward. This can cause the sniffer to alarm when you are below the actual leak.