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🕵️♂️ Sniff out leaks before they cost you—be the HVAC hero everyone envies!
The Mastercool 55900 Refrigerant Leak Detector features a heated tin oxide sensor delivering ultra-sensitive, rapid detection of all common refrigerants. Its 15.5" flexible probe with an intelligent tip minimizes false alarms while accessing hard-to-reach leaks. Certified to SAE and EN standards, this professional-grade tool offers user-friendly controls, peak hold functionality, and comes fully equipped with accessories and a durable case—perfect for HVAC and automotive pros who demand precision and reliability.
| ASIN | B00RVZ6WXQ |
| Best Sellers Rank | 204,121 in Automotive ( See Top 100 in Automotive ) 1,141 in Fuel System Tools 4,532 in Diagnostic, Testing & Measuring Tools |
| Brand | Mastercool |
| Customer Reviews | 3.9 out of 5 stars 52 Reviews |
| Global Trade Identification Number | 00700376559002 |
| Included Components | leak detector, molded case, 2C batteries, test vial replacement filters |
| Item Dimensions | 26.4 x 6.1 x 39.4 centimetres |
| Item Type Name | Refrigerant leak detector |
| Item Weight | 1 Pounds |
| Item dimensions L x W x H | 26.4 x 6.1 x 39.4 centimetres |
| Item weight | 1 Pounds |
| Manufacturer | Mastercool |
| Manufacturer Part Number | 55900 |
| Material | Tin Oxide |
| Model Number | 55900 |
| Product Warranty | 1 year |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specific Uses For Product | refrigerant leak detection, HVAC, automotive |
| Specific uses for product | refrigerant leak detection, HVAC, automotive |
| Style | Intellasense II – Heated Tin Oxide Sensor |
| Style Name | Intellasense II – Heated Tin Oxide Sensor |
| UPC | 700376559002 |
| Unit Count | 1.0 count |
P**E
Five Stars
Like the equipment and is very sensitive.
P**R
Worked beautifully on a very small & sneaky leak on my C6 Corvette when all else had failed.
This little guy solved a very frustrating issue I was having with my '07 C6 Corvette. For 3 years straight I would have to deal with a VERY slow refrigerant leak that would leave me with no AC each Spring when I would fire it up the first time after the long winter indoors. I changed so many parts and added dye, of course, but still no joy. I finally broke down and bought this tool when a local shop scared me with a big fat bid for digging into the issue. It turned out that there was a pin-hole in the condenser that could not be viewed by line of site with or without little mirrors and an IR light. I slipped this sneaky little sniffer-wand up in there and it started beeping like crazy. Bam! I installed the new condenser the next day and it has been hold perfectly with ice cold air at 45 degrees. My corvette is now colder than my wife... but in a good way :) I recommend this tool to anyone who wants to get to the leak quickly. It will pay for itself the first time you use it and if your friend's AC has an issue you might get to be someone's hero. Giddy-up.
S**T
Priced right
Time will tell
A**C
Best investment
Great product,does its job flawlessly
A**R
not bad still testing it
solid tool 3 stars for now have to use it more to make sure the quality is there will update
A**P
Garbage
Does not perform as advertised. Not accurate. Does not provide repeatable results. Absolutely will not work with any amount of air moving across the tip, such as from HVAC vents in a vehicle. Constantly freaks out and goes into “interference” mode. Sent it back to the manufacturer to be repaired and it came back working the same.
Trustpilot
3 weeks ago
5 days ago