USA – The UL-listed PL-PM1RJ power meter, from Whirlwind, is designed for monitoring voltage, current and frequency on 3 phase Y power with three 120 Volt AC legs or single-phase AC with two 120 Volt legs.
More details from Whirlwind (http://whirlwindusa.com ):
You can monitor your power from a laptop, tablet, or any smart phone through any Ethernet LAN and via the Internet. This allows real time power distribution monitoring from any location or multiple locations simultaneously. Features include IP addressing to integrate easily into existing LANs, and unit naming to identify individual monitoring locations. Simply connect the PL-PM1RJ to your network and monitor from any connected device, even wirelessly.
