ThinkTank Energy Watts Up? Pro ES 82756 Pro ES Plug Load Energy Meter

Measures and records 18 parameters, including: Current Watts, Minimum Watts, Maximum Watts, Power Factor, Volt Amp (apparent PWR), Cumulative Watt Hours, Average Monthly Kwh, Elapsed Time, Duty Cycle, Frequency (Hz), Cumulative Cost, Average Monthly $, Line Voltage, Minimum Volts, Maximum Volts, Current Amps, Minimum Amps, Maximum Amps. The PRO ES boasts four times the memory of the PRO, and can hold over 120, 000 records in memory. This enables sophisticated data collection projects to be accomplished with ease, and a high level of resolution. In fact, over a weeks worth of data can be collected with a resolution between records of only one minute. The sample interval (time between records) is user selectable between one second and one day. Memory is non-volatile so no battery is required. The PRO ES version includes all the displays of the Watts up? PRO, and it also comes with the same graphing software and USB interface to a PC. It features a payback calculator (data logger) and a logging interval calculator. It also records any power interruptions.