What device do you use to measure real-time Watts/Amps?

I am looking for a tool/meter/wall plug that will allow me to measure real-time wattage and amperage. Looking for something heavy duty that can be used on S7s or S9s. Some of the options that I have seen such as the Kill-o-Watt and WiFi monitoring plugs seem a little fragile. This device will also be used by my business so I am looking something versatile and that will last. But I am still open to an easier and cheap option if available.

Any ideas or devices you recommend will be greatly appreciated.

Thanks in advance.

Submitted September 29, 2017 at 05:40PM by Plasmaguys http://bit.ly/2fDYmWA