CPS VG200 Digital Vacrometer Vacuum Gauge, Measures Microns, Millibar, TORR, Inches/HG, Two Button Operation, Automatic Temperature Compensation, 5-digit LCD Display, Padded Case, T-Fitting and Hook

I needed a micron gauge for a DIY heatpump install. Usually I go super cheap on tools I'll really only need once but I wanted to be sure that the reading was accurate as a leak is pretty expensive problem with today's refrigerants. This is a nice high quality gauge from an established company with a calibration certificate. I've seen a fair number of these being used in videos from HVAC professionals. I found the gauge to function flawlessly. This was a great value for a gauge that is certified to be accurate. Unit is easy to use, and includes the needed 9v battery. One of the best features is that per the manual, this gauge can withstand the pressure of the refrigerant when releasing the system charge so you don't need to remove the gauge from your core tool prior to releasing the refrigerant. It also includes a small padded pouch for storage which was a nice touch.

This is a great vacuum gauge. It is very accurate and works perfectly. I’ve used it in two air conditioners already and used it on the same air conditioner multiple times. I highly recommend this brand for how easy it is to place on the low side valve. They even give you a t fitting to tee off the hose. Because of the price, I try to treat it well but I can see how durable it is. Everything can be hand tightened and it doesn’t leak.

I am not an AC Tech by any means, however I have done my research and feel that this review will give someone some good info. When I first attached this device I could not pump down under 900 mic on any line set. I questioned the device at first, but then started looking for leaks, and as I read and read that if you cannot get below 500 mic then you have a leak somewhere. I started looking, first at the pump, found a small leak as I have a pump that has 3 connection ports that are capped with plastic caps. Then I found that I had not tightened a coupler enough and then found a bad flare (of course these items were all on different line sets). As soon as I took care of these small items all three line sets that I installed pumped down to below 250 mic. I also learned to read what the device was doing while the pump was running. It would bounce back and forth between numbers 830/840/850/840/830 etc and would go no lower. This told me that something was wrong. All the while I was watching the pressure gauge and it was holding at 30 psi. This device worked perfectly and I would recommend it to anyone who is installing any sort of HVAC system. I think my only gripe is that it turns off after 10 minutes so you have to turn it back on over and over.

These work perfect. I rarely have any problems with these. Most of the time it is user error like the seal inside is bad or there was moisture inside of the gauge or put it too close to the vacuum pump.

Gauge seems to be accurate, included tee is JUNK! Gauge went to 3 microns…. Gauge with the included tee won’t go below 500 on a 9cfm pump. Tried a different seal in it with zero change. The solder / braze job on it is leaking. Not happy about that!

This is a high quality, well made product. The sample speed is fast enough, but there is a delay between the actual pressure and the displayed pressure. It has multiple different units that it can display the value in. I bought it because I needed a micron display. Included accessories are a hanging bracket, a pouch for storage and a "T" adapter. To power it up, you need to install a nine volt battery.

The price is right on this vaccuum guage for the buyer, and the quality is high. It does have a plastic case so you still have to try to NOT drop it from very high...... might or might not break obviously. Even so, it is an excellent and simple device that will take merely a few minutes to install the new battery and have it ready to perform for you. I like the compact size, the very high quality of the MADE in USA parts and pieces, and the nice little protective carry case that comes with it. Compact, high quality, handy and easy to use, low priced..... how can you go wrong? It all fits in this small soft case that is about 6" long by 3" wide, by about 1.75" deep, that is so compact and well protected that it should provide long time good service. Do enjoy! UPDATE 29 May 2014: I finally received my new vacuum pump and put this to work. It takes a little bit for it to settle down at first, but after that, this is a fine instrument I could recommend to anyone. I like the compactness of it, and the quality in the brass fittings is excellent! (USA made, so no surprise there,eh?) It is easy to read, just large enough to be great. The ability to select any type of readout you desire, from Torr to Microns, is good too. It did not repsond well to upper vacuum levels of say 10" and less, but once pumped down below that, all worked very well and was stable. Enjoy!

I have purchased this gauge and a 1.9 vacuum pump, and the work, quality of both items impress me. I am a tool fanatic when it comes to "instruments" and this is not a tool, but should more appropriately called an instrument. It is made in the USA and I intend to buy future items from CPS products first." September 16, 2018: I am taking back my earlier review. The vacuum gauge has been isolated and I duplicated the experiment with 2 separate vacuum pumps, and it is not able to hold the micron reading. It slowly creeps up. I used denatured alcohol per the manufacturer's instructions (did that several times) and let it dry overnight and the problem still persists. Please note that I used this gauge on a recovery cylinder twice and on my vehicle twice, and I suspect that the sensor is going wild. I do not think it is a leak. I think the sensor is just not stable. I am going to look at another product almost more than double the price on Amazon and compare the results. CPS Products needs to admit that it is has a problem with this product and stop selling it. With so many unhappy customers, you would think CPS would get it. It was time consuming and the most frustrating experience. If you relied on my earlier review to buy this product, I am sorry!