ALD-200 Refrigerant Leak Detector HVAC with 3 Sensitivity Modes & 2 Alarms

This detector found a tiny leak in my AC that my old sniffer completely missed. Sensitive, easy to use, and paid for itself in one use. Durable build and clear alerts every HVAC tech or DIYer needs this in their kit. Highly recommend!

This refrigerant leak detector clearly states that it is compatible with A2L and flammable gases, which gives me peace of mind. During actual testing, it responded very quickly; as soon as the probe neared the leak, an audible alert sounded immediately—no waiting required. The handle is comfortable to grip, and the probe is very flexible, allowing it to reach into narrow gaps for detection. When I used it to check for leaks in my home’s air conditioner, the results were immediately clear. The screen display is crisp, and combined with the audible and visual alarms, I never miss a signal even in noisy environments—the design is very user-friendly.

I'm an older seasoned automotive technician, I'm reviewing this product based on my many years of experience in the field using high quality tools and equipment. Digital Halogen leak detector used for detecting freon leaks in A/C systems. Made of plastic with flexible wand for reaching tight places in A/C systems. Seems to work okay, put the wand near our freon tank and it detected the presence of freon, but unsure just how small of a leak it will detect. I'll update this review as needed once the A/C season is in full swing. Price point is considered high for this item.

great product i bought 2 extra

Worked great the first time, went to use it the 2nd time the thing wouldn't even turn on, luckily it was still within Amazon return time frame.

The Simbow LD-200 Halogen Leak Detector is an excellent tool for quickly identifying refrigerant leaks in HVAC systems, cars, and refrigerators. Compatible with R22, R410A, and R134A gases, it provides precise detection with its sensitive sensor. The rechargeable battery ensures long-lasting use, making it convenient for both professionals and DIYers. Its lightweight design and user-friendly interface make it easy to operate, while the audible and visual alerts help pinpoint leaks effectively. Whether you're working on air conditioning systems or automotive refrigeration, this leak detector offers reliable performance and peace of mind.

I was worried that I have a refrigerant leak, since I noticed some oil on my A/C unit outside. My unit uses the sought-after R22 freon refrigerant, which has been discontinued. A leak in my unit would mean I need to fork over big bucks to drain the system and add new freon. I first tested this new device a few different ways, and it appears to work as directed. I then used the device on my outside unit and to my surprise, no leak was detected. Went upstairs to the HVAC unit in the attic and sure thing, found a leak in my condenser coils! Patched it up myself and potentially saved me hundreds. Awesome device!

I have a contractor working on a $116,000 project installation mini split air conditioners and LOTS of them. They have been battling several leaks which was making me worry. So I purchased this detector to get that sorted out and it worked like a charm. Even found 2 leaks on my home unit that I need to get fixed. Worth every penny!

Very sensitive works well good price