Digital AC Voltmeter Panel Mounting Meter AC80-300V Frequency Counter 45.0-65.0 HZ LED Display Voltage Volt Frequency Meter Tester Gauge

It works great. I bought two of them. I had a mold problem underneath my house and I had to have my crawl-space encapsulated (sealed). I mounted them near my breaker-box to monitor my dehumidifier and my sump pump. Because GFI outlets are used and the sump pump has no electronics, I added an LED night light to the outlet connected to the sump pump. It draws 20 ma of current so that I would know if the GFI has been tripped or has failed. The current meter can detect as little as 10 ma of current. I have not verified its accuracy but it works well enough for my needs. The dehumidifier draws about 30 ma in standby mode.

I bought this unit to see how well Texas' now-notorious electrical grid is keeping up with demand during this arctic weather we are having here at the moment. Line voltage and line frequency both 'sag' when generators are struggling to keep up with demand, but so far so good (fingers crossed). I have also been monitoring the U.S. Grid via FNET's website which shows the instantaneous frequency in various U.S. regions, and this little meter is accurately tracking these changes (to one decimal place) as they occur in Texas' grid.Technical note: this meter truncates the frequency measurement at the first decimal. It does not round the value, and so if the line frequency is, say, 59.999... Hz, it displays 59.9 Hz, not 60.0 Hz. This is preferable because otherwise the frequency would always display 60.0 Hz except in cases of a serious grid fault. Line frequency typically varies less than 0.01% under normal conditions.Very nice little meter. Accurate, looks well made and has a nice, bright display, all at a great price. A solid five stars for this product.

Great meter for my home project very accurate as well.

I purchased for the purpose of utilizing as a HZ meter. Does its job but just keep in mind it’s very small. Looking at the picture I thought it would be larger. Just check the measurements. Functioned with no issues.

I have a couple of UPS devices in the house that are pretty fussy when it comes to the 60hz frequency. From time-to-time, the UPS would not switch to the generator power because the frequency would be off a couple of cycles.I purchased this counter and installed it. I am now able to adjust the frequency if it gets out of whack. Doesn't happen often, but it's sure handy to have when I need to fine-tune things!

Use this with my generator. Works great. Makes it easy to track what my usage is in amps and that the generator is maintaining an acceptable voltage.

The media could not be loaded. I installed this in our camper. Installation was simple and straight forward. I have used several of these in the past and have always been pleased. Please see my attached video. Thanks!

Made a meter to monitor output of an old generator