KETOTEK Digital Ammeter Voltmeter AC 80V-300V 100A, 2in1 Multimeter Panel 110V/220V, Volt Amp Meter LED Display Voltage Amperage Detector Tester Gauge with Current Transformer CT

Works as claimed and good quality display. 2 wire AC connections are simple with no regard to polarity. I epoxied wires at the connection for added stability.

I added one of these meters to an electrical sub panel in my workshop to monitor current usage and voltage when I'm running my power tools. This meter works very well, was easy to install, and is easy to read from across the room. I haven't verified its accuracy with my multimeter but it gives consistent and reasonable readings.

I installed these to Monitor, a whole Home UPS running 240 V. In addition, I can also Monitor the 120 side for my generator to ensure that I’m not overloading it These are bright, easy to read. Even pull daylight, and will Monitor, Your kilowatt hours, If need be, they have an excellent, so far after almost a year of constant use

The vendor initially shipped the wrong unit, a Volt/Hz meter, I returned it and received the correct Volt/Amp meter. I have installed it and connected it to a Balanced Power Isolation Transformer to monitor the output load. The voltage readout appears be be correct. I have no way to independently verify the current reading. The vendor claims that the unit works with both 50 and 60 Hz AC power. I'm a little suspicious that it can be accurate for both frequencies. Nonetheless, I wasn't expecting a laboratory grade meter and am satisfied with the performance. It was a perfect size to install in a 1U NEMA rack panel.

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.

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.

Worked just as it should.

Perfect replacement for my 30 year old Heathkit 2203 Line Voltage Monitor with the added bonus of a frequency counter. A great generator monitor. Extremely accurate against my Fluke meter, though it is not an average voltage, in that 121.9 volts still reads 121. Working on mounting it in a Zulkit 3.94 x 2.68 x 1.97 inch (100X68X50mm) project box. Overall, I am very happy with it.

I use this on the output from my variac to show the output voltage and current drawn. Checked against calibrated meters and it’s within 1/2% m. Excellent

The voltmeter and Frequency counter was very easy to install and worked great.

Llegó bastante antes de lo previsto y eso es ya algo bueno. Me sorprendió que es mas grande y robusto de lo que me esperaba, por lo demas ya esta funcionando y va percecto, ahora solo hace falta que dure. Y eso, muy bueno para llevar un control aproximado del consumo en el hogar, en un negocio o en cualquier otro sitio. Gracias

Not happy