






🔍 Detect leaks before they detect you — Mastercool 55900, the pro’s secret weapon!
The Mastercool 55900 Refrigerant Leak Detector features a heated tin oxide sensor capable of detecting all common refrigerants with exceptional sensitivity (down to 0.15 oz/year) and rapid response time (<1 second). Its 15.5" flexible probe with an intelligent environment-sensing tip reduces false alarms, while multi-level LED indicators and peak hold functionality enhance usability. Certified to SAE J2791, J2913, and EN 14624 standards, this professional-grade tool comes complete with essential accessories and offers up to 30 hours of battery life, making it a reliable choice for HVAC and automotive technicians seeking precision and efficiency.






| ASIN | B00RVZ6WXQ |
| Batteries | 2 C batteries required. (included) |
| Best Sellers Rank | 795,387 in Automotive ( See Top 100 in Automotive ) 59,945 in Car Tools & Equipment |
| Brand | Mastercool |
| Customer Reviews | 4.2 4.2 out of 5 stars (149) |
| Date First Available | 6 Jan. 2015 |
| Item Weight | 454 g |
| Item model number | 55900 |
| Manufacturer | Mastercool |
| Manufacturer part number | 55900 |
| Model | 55900 |
| Product Dimensions | 26.42 x 6.1 x 39.37 cm; 453.59 g |
P**E
Five Stars
Like the equipment and is very sensitive.
A**O
Produto de excelente qualidade
P**R
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.
T**R
Great price and works very very well
A**L
not usefull Brand is good but not detecting i was new user so could not return on time and did not understand. wrong leakge detecting
R**N
Fácil de usar. Detecciones claras. Ahora hago entregas confiables,certeras...efectivas.
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