|Which Electronic Refrigerant Leak Detector to Buy?
most part, there are just two types of electronic leak detectors. There
are those that use a heated diode, and those that rely on corona
discharge. On the corona discharge type, anything that breaks
that corona barrier will set off the detector. You name it - dust,
moisture, refrigerant (sometimes), solvents, etc.
you have the heated diode type detectors. They are less prone to false
alarms from moisture and shop chemicals. More importantly, heated diode
leak detectors are also much more sensitive to R-134a. Other leak
detectors are suitable for finding R-12 and R-22 leaks, but we've found
that leaks in R-134a systems are best located using the heated diode
detectors. In fact, right after R-134a came out, most of our electronic leak detectors became obsolete. Leak detectors which once worked well with R-12 and R-22 just weren't doing the job. It's not that electronic leak detectors don't work with R-134a, it's just most don't work well enough.
Here's our recommendation. Look for a leak detector that uses a heated sensor.
Years ago there were few models that incorporated the heated
diode. Today, there are many heated sensor units to choose from,
and most are very economical to own. When researching which
detector to buy, consider sensor life expectancy, and unit sensitivity
during comparison . These specifications should be mentioned in
Other factors to consider when choosing a leak detector:
Comment #1 (Posted by duhbob)
The term"Heated-diode" is new to me, a returning Old Pro; it tells me a lot.
This article will save noobies some anxiety and money.
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