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Rugged Plug Load Logger records equipment energy use data.

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Rugged Plug Load Logger records equipment energy use data.
Rugged Plug Load Logger records equipment energy use data.
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July 8, 2014 - With 0.5% accuracy, HOBO Plug Load Logger measures power and energy consumption of 120 V plug loads from office equipment, vending machines, and other devices. Memory capacity for 1.9 million measurements enables accelerated logging intervals, and Meter Mode provides instant viewing of real-time plug load variables. Datalogger can measure up to 6 parameters: True RMS Voltage, True RMS Current, Watts, Watt-hours/Kilowatt-hours, Apparent Power, and Power Factor.

New HOBO® Plug Load Logger Provides Accurate Equipment Energy Use Data in Rugged, Easy-to-deploy Package

Onset Computer Corporation
470 MacArthur Blvd.
Bourne, MA, 02532

Press release date: June 25, 2014

BOURNE, MA — According to the U.S. Department of Energy, plug loads – or energy used by equipment plugged into an outlet – can account for up to 50% of a building’s total electrical load. While minimizing plug loads can be an effective energy reduction strategy in buildings, it is often difficult for energy auditors and building management professionals to determine how much energy individual pieces of equipment such as computers, monitors, printers and other devices consume. This, in turn, makes it difficult to prove out the return-on-investment for energy management and control strategies, or even educate building occupants on the impact of equipment shut-down best practices.

To help solve these issues, Onset, a world leader in data loggers, has announced the HOBO Plug Load Logger, a high-accuracy, easy-to-deploy data logger that measures and records the power and energy consumption of 120V plug loads from office equipment, vending machines, and other devices.

Capitalizing on the HOBO reputation for reliability, the logger offers a number of key advantages:

• 0.5% measurement accuracy enables more reliable plug load energy use data
• “Meter Mode” provides instant viewing of real-time plug load variables
• Large memory enables faster logging intervals for more comprehensive plug load profiles
• Battery backup ensures logged data remains intact in the event of a power outage or load failure
• Full-featured LCD display provides visual diagnostics for easy deployment
• Accompanying HOBOwareŽ software for graphing and analyzing plug load data

“As plug load analysis has become a more integral part of identifying savings opportunities in commercial office spaces, the need for a plug load monitoring tool of professional grade that can provide accurate, reliable data to the energy auditing professional is very strong,” said Herman Gustafson, Onset product marketing manager. “The HOBO Plug Load Logger meets this need head on, and will help energy professionals determine opportunities for energy savings on plug loads and confirm these savings once plug load controls are implemented.”

Reliable, accurate performance
The HOBO Plug Load Logger provides 0.5% measurement accuracy with a measurement resolution of 1 watt, making it an ideal choice for building audits where detailed energy use data is required. The logger can measure up to six parameters – True RMS Voltage, True RMS Current, Watts, Watt-hours/Kilowatt-hours, Apparent Power, and Power Factor – to provide a comprehensive plug load profile. And its rugged housing is designed to withstand the rigors of real-world handling, providing reliable performance despite bumps, drops, and use under desks.

Fast, easy deployment
The HOBO Plug Load Logger streamlines energy auditing applications in a number of ways. For example, it features an easy-to-view LCD that visually confirms logger operation and battery status, and displays real-time plug load variables without having to connect the logger to a computer to view the information. The logger’s large memory capacity is capable of storing 1.9 million measurements, enabling faster logger intervals for more comprehensive plug load profiles, as well as longer deployment periods between offloads.  And the logger’s “Meter Mode” allows users to quickly get a read on the current energy use of a particular area of interest with zero software setup; this can be very useful for walk-through audits or to identify which equipment is the best candidate for longer-term monitoring.

Graphing and Analysis Software
Once load data has been recorded with the HOBO Plug Load Logger, it can be easily viewed in graph form and analyzed using Onset’s HOBOwareŽ graphing and analysis software for Windows and Mac. The software makes data readout hassle-free, provides powerful plotting tools , and enables plug load data sets to be easily combined with data from other types of HOBO data loggers commonly used in building energy audits, including Onset’s HOBO UX90 Occupancy/Light loggers and HOBO UX100 Temperature/Relative Humidity loggers.

Pricing and Availability
The HOBO Plug Load Logger (model HOBO UX120-018) is available immediately from Onset and is priced at $239.  Please visit for complete pricing details and technical specifications, or sign up for a free live webinar to learn more.

Onset is a leading supplier of data loggers. The company’s HOBO data logger and weather station products are used around the world in a broad range of applications, including building energy performance monitoring, water resources management, and ecological and agricultural research.  Based on Cape Cod, Massachusetts, Onset has sold more than 2.5 million data loggers since the company’s founding in 1981. Visit Onset on the web at

Onset Computer Corporation
1-800-564-4377 / 508-759-9500
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