UX120-018 Plug Load Data Logger


  • 0.5% measurement accuracy enables more reliable plug load energy data
  • “Meter Mode” provides instant viewing of real-time plug load variables
  • Provides time-stamped and totalized load data for detailed energy analysis
  • Large memory enables faster logging intervals for more comprehensive plug load profiles
  • Battery back-up 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
  • Compatible with HOBOware and HOBOware Pro software for logger setup, graphing and analysis

Additional Equipment Required

SKU: UX120-018 Categories: , , , ,


The HOBO® UX120-018 Plug Load Data Logger is a high-accuracy, easy-to-deploy logger that measures and records the power and energy consumption of 120V plug loads from office equipment, vending machines, and other devices. It supports the following measurements: AC Current, AC Voltage, Amps (A), Kilowatt Hours (kWh), Power Factor (PF), Volt-Amps (VA) and more.

This UL certified 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 rugged housing is designed to withstand the rigors of real-world handling, providing reliable performance despite bumps, drops, and use under desks.

HOBO and Onset are trademarks of Onset Computer Corporation, Bourne, Massachusetts (USA).


RMS Voltage Accuracy 0.5% up to 14 Amp continuous; up to 1.0% over 14 Amp when equipment being monitored is at 100% duty cycle
RMS Current Accuracy 0.5% up to 14 Amp continuous; up to 1.0% over 14 Amp when equipment being monitored is at 100% duty cycle
Active Power Accuracy 0.5% up to 14 Amp continuous; up to 1.0% over 14 Amp when equipment being monitored is at 100% duty cycle
Active Energy Accuracy 0.5% up to 14 Amp continuous; up to 1.0% over 14 Amp when equipment being monitored is at 100% duty cycle
Power Factor Accuracy ±0.02
Drift Up to 0.5% typical within 1 year
Resolution 1 Watt Load at 120 V AC 15 Amp
Operating Environment Logging: 5° to 40°C (41° to 104°F); 0 to 95% RH (non-condensing), up to 2,000 m (6,562 ft) altitude
Operating Modes Meter or logging when launched with HOBOware
Logging Rate 1 second to 18 hours, 12 minutes, 15 seconds
Statistics Sampling Rate 60 Hz or 16.67 mS single-cycle
Memory Modes Wrap when full or stop when full
Start Modes Immediate, push button, date & time, or next interval
Stop Modes When memory full, push button, or date & time
Restart Mode Push button
Time Accuracy ±1 minute per month at 25°C (77°F), see Plot A
Power Source Line-powered with 0.92 m (3 ft) AC power cord or two AAA 1.5 V alkaline batteries, user replaceable
Battery Life 2 years with line power; 6 months battery only (no line power) with logging rate of 1 minute or greater operating at 25°C (77°F)
Memory 4 MB (1.4 million measurements, maximum)
Download Type USB 2.0 interface
Full Memory Download Time Approximately 1.5 minutes
LCD LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range
Size: 13.97 x 7.62 x 4.75 cm (5.5 x 3 x 1.87 in.)
Weight: 230.8 g (8.14 oz)
Environmental Rating: IP50
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU)
Calibration This device has been calibrated using equipment that has been tested in accordance with ANSI C12.20 0.5%. To maintain maximum accuracy, recalibration should be performed after 1 year of use to remove the accumulated drift, which could be as much as 0.5%. After initial 1-year calibration, calibration should be performed every 3 years.


Onset® HOBOware software supports all HOBO® data loggers and is available free for download.

Standard Features

  • Simple menus for fast, easy logger setup and readout
  • Point & click for fast setup and readout
  • Scaling to real-world engineering units
  • Presentation-quality graphs
  • Easy export of data files to text or Excel format
  • Free download

Easy Setup

Logger setup and readout is fast and easy with simple, intuitive windows.

Powerful Tools

Graphing and analysis tools allow you to plot, analyze and extract key data with just a few simple clicks.


Presentation Quality Graphs

Easily create high-quality visual presentations of your data.

HOBOware Pro Software

In addition to the free standard HOBOware software, a Pro version is available for purchase. HOBOware Pro features include:

  • Time-saving tools for fast setup & readout
  • Advanced plotting tools for more precise data analysis
  • Access to Data Assistants for post-processing data
  • Ability to create Pie Charts
  • Crop a series to a specific time frame
  • Subset Statistics Tool for details within a time frame
  • 21 CFR Part 11 Compliance
  • Data Shuttle support
  • HOBOnode Manager to support ZW Data Nodes