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Temperature & Relative Humidity Data Logger


The HOBO UX100-003 Temperature/Relative Humidity data logger records temperature and relative humidity (within 3.5% accuracy) in indoor environments with its integrated sensors. The data logger is ide..

  • Brands Onset
  • Product Code: UX100-003
  • Availability: 7-10 Days

Tags: temperature, humidity, ux100, 3.5%, indoor, ux100-003

Temperature and Relative Humidity Data Logger

The HOBO UX100-003 Temperature/Relative Humidity data logger records temperature and relative humidity (within 3.5% accuracy) in indoor environments with its integrated sensors. The data logger is ideal for monitoring occupant comfort in office buildings, tracking food storage conditions in warehouses, logging temperature trends in server rooms, and measuring humidity levels in museums.


Highlighted Features

  • Easy-to-view LCD display
  • Large memory capacity
  • Visual high & low alarm thresholds
  • New Burst and Statistics logging modes
  • User-replaceable Relative Humidity sensor
  • Compatible with HOBOware and HOBOware Pro software for logger setup, graphing and analysis


In what environment does this data logger operate?

This data logger operates in an indoor environment.


What measurements does this data logger support?

The UX100-003 data logger supports the following measurements: Relative Humidity and Temperature


For more information visit Onset

To ensure that your Data logger meets CFR Part 21 Compliance, the HOBOware PRO v.3.x software is required.


Product Datasheets

Product Operational Documentation

Product Software

UX100-003 Datasheet Quick Start for the HOBO® U-Series Data Logger  

UX100 Loggers Data Sheet

HOBO Temp/RH 3.5% Data Logger (UX100-003) User's Manual  


HOBO UX100-003 Temp/RH 3.5% Data Logger

Command™ strip

Double-sided tape

Hook & loop strap

The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below.


Upcoming Webinars & Courses

On-Demand Webinars

How-To Videos

Product Overview Videos

Informational Pages

Application Stories

Tech Notes

Self-Guided Training

Tips, Tricks, Methods for Industrial Data Logging Choosing the Right Temp/RH Data Logger to Meet Your Needs HOBOware Menus Explained Part 1 HOBO Data Logger UX100 series Tips on Buying a Data Logger Assessing “Building EQ” Data logger is shutting off prematurely Working with HOBO UX100 data loggers
  Data Logger Basics HOBOware Menus Explained Part 2   What is a Data Logger? Building Drydown: Documenting the Process with Ease Data loss and recovery  
  Tips for Selecting and Deploying Data Loggers for Building Performance Monitoring HOBOware Pro, secure mode and 21 CFR Part 11 compliance     Data Loggers Help Diagnose "Sick School" Drying a wet circuit board  
    How to Analyze Data in HOBOware - Statistics and Filters     Data Loggers Test Air Shipments of Oxygen Containers How often do temperature data loggers need recalibration and/or servicing?  
    How to automatically launch multiple HOBO USB data loggers     Using Data Loggers to Perform Environmental Monitoring Possibility of exposure to chemicals or chemical vapors  
    Visit Onset's YouTube Channel       Protecting data loggers from electrical discharge (ESD)  
            Stopping your data logger  
            A quick temp-accuracy check (ice bath)  
Download Type USB 2.0 interface
Full Memory Download Time 20 seconds
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
Logger Battery Life 1 year, typical with a logging rate of 1 minute and a sampling interval of 15 seconds or greater
Logger Battery Type One 3V CR2032 lithium battery
Logger CE The CE Marking identifies this product as complying with all relevant directives in the European Union (EU)
Logger Dimensions 3.66 x 8.48 x 1.52 cm (1.44 x 3.34 x 0.6 in.)
Logger Environmental Rating IP50
Logger Memory 128 KB (84,650 measurements, maximum)
Logger Time Accuracy ±1 minute per month at 25°C (77°F)
Logger Weight 30 g (1.06 oz)
Logging Modes Normal, Burst or Statistics
Logging Rate 1 second to 18 hours, 12 minutes, 15 seconds
Memory Modes Wrap when Full or Stop when Full
Restart Mode Push Button
Start Modes Immediately, Push Button, Date & Time or Next Interval
Stop Modes When Memory Full, Push Button, or Date & Time
Logger Operating Range
Launch/Readout 0° to 50°C (32° to 122°F) per USB specification
Logging -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
Relative Humidity Sensor
Relative Humidity Sensor Accuracy ±3.5% from 25% to 85% including hysteresis at 25°C (77°F); below 25% and above 85% ±5% typical
Relative Humidity Sensor Drift <1% per year typical
Relative Humidity Sensor Range 15% to 95% (non-condensing)
Temperature Sensor
Temperature Sensor Accuracy ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F)
Temperature Sensor Drift <0.1°C (0.18°F) per year
Temperature Sensor Range -20° to 70°C (-4° to 158°F)
Temperature Sensor Resolution 0.024°C at 25°C (0.04°F at 77°F)
Temperature Sensor Response Time 4 minutes in air moving 1 m/s (2.2 mph)