Watt meters are used by the general home owner or incorporated in a large predictive maintenance program. They calculate the cost of usage of electricity and give you an idea of the energy consumption your building or home is using.
REED R5000 True RMS Watt Meter, 6000W
REED R5000 True RMS Watt Meter, 6000W with NIST Traceable Certification
Amprobe BT-120 Circuit Breaker Tracer
Amprobe BT-250 Breaker Tracer
Amprobe ISO-PRO Telaris Insulation Tester