Onset Computer Corp. offers the HOBO UX120 Pulse Logger for energy management. The system can measure and record Power Factor (PF), Reactive Power (VAR), Watt Hours (Wh), as well as pulse signals, events, state changes and runtimes, the company says. HOBO UX120 Pulse Logger accepts voltage ranges of 90VAC to 600VAC, current ranges of 5 amps to 32 amps, and can be used for both single and three-phase monitoring applications.