"Plug the device in, and the display comes to life, showing the power consumption, current that's being drawn, power factor of the device (the ratio of useful or real power to total supplied power in an AC system, and it indicates how efficiently the electrical power is being used), along with annual power consumption in kWh. It also shows the voltage and frequency of the input power (which makes it handy for me to test both the power input and output of portable power stations)."
"The display is nice and clear, making it easy to read even under bright sunlight. I've connected hundreds of devices to this, from tiny chargers to huge power stations, and it's performed flawlessly. It's a great meter, but it's pretty rough and ready, and rather industrial, and there's no way to connect it to any logging apps. But for about $75, The a good buy for anyone needing to test a lot of equipment."
Portable plug-in power meters measure power consumption of mains-powered devices and report current, power factor, voltage, frequency, and estimated annual kWh. The ATX 9801 functions as a compact extension lead with a universal front socket, enabling testing of US, UK, European, and Chinese plugs. The display presents real-time consumption, current draw, power factor, voltage, and frequency, aiding evaluation of efficiency and testing of portable power stations. The unit is clear to read outdoors and has handled everything from tiny chargers to large power stations reliably. The meter is rugged and affordable (around $75) but lacks app-based logging.
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