380801-NIST / Extech Power Analyzer with Nist True RMS Voltage & Current measurements of sine, square, triangular and distorted wave forms with a crest factor
380803-NIST / Extech True RMS Power Analyzer/Appliance Tester and Datalogger with NIST. Four simultaneous displays of Watts, Power Factor or VA, Voltage or Hz, Amps
This universal AC power source and power analyzer includes data analysis software, making it ideal for determining the quality of input power used by other devices.