For example: Agilent E4440A or Anritsu 68369
Line Power Analyzers/Monitors
Valhalla Scientific 2110A
Digital Power Analyzer, .2A - 20 A, 150V - 600V

Manufacturer: Valhalla Scientific
Valhalla Scientific 2301L
2301L Low Voltage Single-Phase Power Analyzer

Manufacturer: Valhalla Scientific
Valhalla Scientific 2330A
Single-Phase Power Analyzer(Single-Channel)

Manufacturer: Valhalla Scientific
Valhalla Scientific 2410
Single-Phase Analyzer with Enhanced Accuracy

Manufacturer: Valhalla Scientific
Valhalla Scientific 2430
Three-Phase Analyzer with Enhanced Accuracy

Manufacturer: Valhalla Scientific