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Innovative Solutions in Product Design
CPS Products is a business built by technicians, for technicians. We design Tools for the Professional Service Technician. With the world’s most comprehensive range of Leak Detection technologies, Smart Diagnostic tools, and proven Maintenance Solutions, CPS Products has been The Workingman’s Choice since 1989.
LS2
LS790B
LS1
Damaris Vasallo
Reviewed in the United States on December 15, 2024
Muy bueno
Len S.
Reviewed in the United States on January 6, 2017
I've tried to work this out with CPS, but they clearly don't stand behind their products. This model, the LS790B has performed remarkably well for the few we used on our production lines over the last decade since R410A was implemented, but their latest designs DO NOT WORK WITH R490A. Do not buy this model if you intent on using it for R410A.
Jared, Mechanic/Bkyd Engineer
Reviewed in the United States on September 15, 2015
ok. I read the manual quick and got an idea of how it works, then I started using it. I usually see how I am supposed to use it, then I start playing and make it work for me and how I'll use it.This is my recommendation. First, the detector works great. I had a town car with a leak that I couldn't find otherwise and knew it was timeto get a detector. Let me begin by saying...if you are a mechanic, stop wasting your time and refrigerant. Get one of these. It will save you whatever it costs on the VERY FIRST repair. I found a leaky evaporator and a leaky low side valve within 10 minutes. Both were fixed...no more leaks. Holy cow I wish I would've bought this a while ago. Forget any other method. A small leak you will NEVER find without one of these.(Before I get into it, if the system has leaked out, you need to charge it because it reads the refrigerant, not just a leak. If that isn't implied you should understand that. You need to evacuate the system and put a charge to it. Vacuum pumps are cheap and you need to do it right anyway because you'll eat compressors if you don't get the air/condensation out. the oil that's used in the systems absorb that stuff and ruins it)Ok. Here's how I use it. I gauge the leak by first turning up the sensitivity to max and waving it around the engine bay. As others have said, if it's a bad leak, it will just constantly go off. That's ok. At least you'll know it's a large leak.I start max sensitivity and wave it around...no beeping. Good. Small leak. Then start working around all the components. If it's going off like crazy, back off the sensitivity. My leaks were really small, so I worked around with max and found them. Start at the obvious spots...around the compressor, condensor, where the lines connect to each other or other things, fill valves. It will most likely not have a random hole in the middle of a steel tube. It will be something that makes sense usually (leaking seals, valve, etc.).And that's my advice. Hope that helps someone out. I am an ASE master tech if anyone is wondering.
tony
Reviewed in the United States on March 30, 2015
This thing is junk. After only 3 uses, it started to act up. Thought the battery was maybe bad, so I changed out the battery, and still it would malfunction. I emailed the seller, but they told me that it was passed 30 days since I purchased it. Which I understand, I don't blame the seller. They where kind enough to send me the manufactures info so that I may be able to warranty it through them. I don't like giving bad reviews, I have used this tool before when I used to work at other shops, and thought I was buying quality. But I guess this was not the case this time.
mike
Reviewed in the United States on December 13, 2015
U get what u pay for. Works for huge leaks not so much for little ones.
ttview
Reviewed in the United States on April 22, 2015
This is a pretty decent piece of kit if you really need to use it. That said I can't think of any situations where adding refrigerant dye and using a UV light wouldn't have been both easier and quicker. The problem with this leak detector is that unless you hold it in position for a long while it may not be able to sniff out leaks that are very slow. If you've ever seen what a really slow air leak looks like underwater it poses the same problem. You'd have to hold this over the leak long enough for the gas bubble to build up enough volume to be sniffed by this tool and that can sometimes take as long as 30 seconds. By that time you'd already be thinking there's no leak at that point and move on to another test spot. I recommend it as long as you understand those considerations.
Wesley J Terry
Reviewed in the United States on August 18, 2014
In the past I have used soapy solution to detect leaks in ac systems, but this thing is too easy and incredibly sensitive (sensitivity is adjustable too). It found a very small leak in my auto ac system that had been taking about a month to leak down far enough to require me adding freon (R134-A). The cost was about half of what a visit to the repair shop would have cost for the same diagnosis and now I have the tool available for future use.
Scott
Reviewed in the United States on September 13, 2009
This is the best leak detector I have owned. It is really sensitive to small leaks. I owned a Inficon leak detector and it does not even compare to this CPSLS790B leak detector. This CPs detector will pick up the smallest leaks with no effort. The only thing I do not like about it is the alarm sound has a funny sound to it. But man this thing works. I'm not going to use my old Inficon leak detector no more after buying this CPS tool. CPS is much better. I don't think this detector does the new refrigerants. Not 100% sure on this but I believe I'm correct. Research this to be sure. I no it does R22 and R12. I would buy another one .
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