I have used the same supco for two years now and just now having problems. Will check into the other brand for my next purchase.
I used to have a supco & it worked good for years. I now have a blue vac & used it once so far & like it.
I have used the same supco for two years now and just now having problems. Will check into the other brand for my next purchase.
I will also plug trutechtools.com . Great service & fair prices.
I discovered via an instrument manufacturer, that the heated thermocouple sensor in the common micron gauges are exceedingly sensitive to contaminants. Oil is a biggie and for those of you who just toss the gauge in a storage bin or tool box and do not cap the gauge, you are likely the ones that have the most incidence of problems. Key is to mount them as close as you can to the system and away from/ uphill from any oil. Valves are good as you can valve off the micron gauge until the bulk of the evacuation is done.
Comparing a used brand a micron gauge's reading with a new brand b gauge's reading is not useful. Must compare new to new to get any sense of reality.
Wow, thanks guys a bunch of my tools are coming up for replacement soon.
We've done a ton of research on vacuum gauges since we no longer use the u tube mercury manometer. We found the most reliable and accurate electronic vacuum gauge is the Yellow Jacket 69060
http://www.yellowjacket.com/product/688
It doesn't look as sophisticated as others with LCD displays, but it is a laboratory quality instrument that I have had great success with, but it is very pricey compared to other models. It is A/C powered which can be a drag. But I'll sacrifice convenience for accuracy and reliability.