Toll Free: 1-877-275-9606
(603) 746-5524
$5.99 Flat Fee Economy Shipping on Most Items Shipped in the Continental USA

You have no items in your shopping cart.

Subtotal: $0.00

Onset HOBO UX100 Humidity Data Logger with External Sensors

HOBO Temperature and Humidity Data Logger w/ External Sensor

Onset Indoor Data Logger Recording Humidity with a 2.5% Accuracy and Temperature

Part Number: UX100-023A

Ask a question (1)

Be the first to review this product

  • External Sensors (Included) for Temperature and Humidity Measurements in an Indoor Environment

  • -20°C to 70°C and 1% to 95% RH Measurement Ranges with a ±0.21°C and 2.5% RH Accuracy

  • Stores up to 84,650 Measured Temperature Readings with Date/Time Stamp

  • User-Replaceable CR-2032 Lithium Coin Cell Battery with 1 Year Life (1 Minute Sampling Rate)

  • User-Selectable Sampling Rate of 1 Second to 18 Hours

Requires Type A to Mini B Standard USB Cable (CABLE-USB), HOBOware (Free Download Version) or HOBOware Pro (Paid Download Version) Software.

Availability: In stock


All Calibration Orders Have a 5 to 7 Business Day Lead Time
1 Year Calibration Due Date Unless Otherwise Specified

* Required Fields


Onset HOBO® UX100-023 Temperature and Humidity Data Logger Specifications

Data Channels 1 Temperature Channel
1 Humidity Channel
Humidity Measurement Range: 1% to 95% @ -40C to 75C*
Accuracy**: ±2.5% (10% to 90% RH) Typical to Max 3.5%
Resolution: 0.05% @ 25°C and 30% RH
Response Time: 5 Minutes to 90% in Air Moving 1 m/s (2.2 mph)
Drift: < 1% per year
* Exposure to Conditions Below -20C or Above 95% RH May Temporarily Increase RH Error by Additional 1%
** Includes Hysteresis
Temperature Measurement Range: -20°C to 70°C (-4°F to 158°F)
Accuracy: ±0.21°C (±0.38°F) @ 0°C to 50°C
Resolution: 0.024°C @ 25°C (0.04°F @ 77°F)
Response Time: 6 Minutes in Air Moving 1 m/s (2.2 mph)
Drift: < 0.1°C (0.18°F) per year
Data Storage Capacity 84,650 Temperature Readings
Sampling Rate 1 Second to 18 Hours (User-Specified)
Display Type: LCD
Note: Display is Visible from 0°C to 50°C (32°F to 158°F)
Display May React Slowly or Go Blank in Temperatures Outside this Range.
Power Source (1) CR2032 Lithium Coin Cell Battery
Battery Life 1 Years @ 1 Minute Sampling Rate
(Dependant Upon Environment and Operating Range)
Alarms Visual High and Low Alarm Thresholds Displayed on LCD and Set via Software
Time Accuracy ±1 Minute per Month @ 25°C (32°F to 122°F)
Communications USB Connection to Setup Data Logger and Download Data
Logging Modes Normal, Burst or Statistics
Data Storage Modes Stop When Full or Wrap/Overwrite When Full (FIFO)
Start Modes Immediately, Push Button, Date & Time or Next Interval
Restart Mode Push Button
Stop Modes When Data Storage Full, Push Button or Date & Time
Software Compatibility HOBOware and HOBOware PRO Version 3.5+
OS Compatibility Windows: Windows 10, 8.1, 8 and 7
Mac: OS X 10.9.x, 10.10.x and 10.11.x
Operating Range Temperature: -20°C to 70°C (-4°F to 158°F)
Humidity: 0 to 95% RH (non-condensing)
Launch/Readout: 0°C to 50°C (32°F to 122°F) per USB Specification
Standards Compliance CE, IP50
Weight 30 grams (1.06 oz.)
Dimensions 3.66 cm x 8.48 cm x 2.29 cm (1.44" x 3.34" x 0.9")

You may also be interested in the following product(s)

Onset U-Shuttle Data Transporter

Onset U-Shuttle Data Transporter

  • Pocket-Sized Shuttle for Readout and Relaunch HOBO Data Loggers
  • Syncs Data Logger Clocks and Relaunch
  • View Readings on LCD Display
  • Direct USB Connection to PC Computer
  • Requires HOBOWare PRO Software
Learn More
Onset Replaceable Humidity Sensor

Onset Replaceable Humidity Sensor

  • Replacement Relative Humidity (RH) Sensor
  • Compatible with the Onset HOBO UX00-023, U23-001, ZW-005, ZW-007 Data Loggers
Learn More
Pelican Protective Carry Case

Pelican Protective Carry Case

  • Durable Airline-Legal Carry-On for Data Logging Equipment
  • Strong Polyurethane Wheels with Stainless Steel Bearings
  • Open Cell Core with Solid Wall Design
  • Stainless Steel Hardware and Padlock Protectors
  • Pick N Pluck™ with Convoluted Lid Foam
Learn More
HOBOware Pro Software and USB Cable Kit

HOBOware Pro Software and USB Cable Kit

  • Advanced Software for Management of Onset Data Loggers
  • Supports Data Shuttle, Data Assistants and Plug-ins
  • Additional Time-Saving Tools for Fast Setup and Data Readout
  • Advanced Plotting Tools for More Precise Data Analysis
  • Compatible with Windows and Mac Operating Systems

Kit Includes HOBOware Pro Software and Standard Type A to Mini B USB Cable (#CABLE-USBMB-HS)

Compare HOBOware (Free Download) to HOBOware Pro Software

Learn More

Customer Reviews

Write Your Own Review

You're reviewing: HOBO Temperature and Humidity Data Logger w/ External Sensor

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars
  • Answer:

    This logger is not wireless so it doesn't utilize a WIFI connection.  The logger must be connected to a computer via a USB cable and running the free HOBOware software.  Once it has been configured using the software you can disconnect it from the computer and place it wherever you wish to record readings.  The recording interval can be adjusted during the configuration process and ranges from one every second to once every 18 hours. 

    Once you finish recording your data you plug the logger back into the computer and use the software to view and download the data.  The data can be viewed in a native file format in the software or exported as .CSV or .PDF files. 

    These loggers are tested for accuracy during the manufacturing process.  They do not come with any formal calibration certificate or certificate of quality.  As a service we offer calibration services through our ISO 17025:2005 accredited lab.  This service is offer as an option on the product page for each logger.


     This manufacturer does offer wireless loggers but they are Bluetooth and not WIFI.  They must be configured and communicate with a mobile device using a free app.  The data can then be sent to a desktop computer and opened using the desktop software.  At this time there is no way to have them transmit data to a cloud automatically unless you first connect to them via Bluetooth.  Onset does not charge for their cloud service at this time.

    Here is a link to one of their Bluetooth temp and humidity loggers with an external sensor like the one you were looking at: https://www.microdaq.com/onset-hobo-outdoor-bluetooth-external-humidity-data-logger.php

    Here is a much less expensive version that uses an internal sensor and isn't rated for outdoor use:  https://www.microdaq.com/onset-hobo-bluetooth-humidity-data-logger.php


    If you require a logger with WIFI connectivity that can automatically push data to a cloud I would suggest looking at the EL-WIFI series from Lascar Electronics.

    Here is a link to one with an external sensor - https://www.microdaq.com/lascar-wifi-high-accuracy-external-thermistor-sensor-data-logger.php

    And again, an option for one with an internal sensor - https://www.microdaq.com/lascar-wifi-temperature-humidity-data-logger.php


    Lascar does charge for their cloud service.  The cost of the monthly plans vary depending on the number of loggers you have and how long you want to save and access data.

    They offer a limited no charge plan for one logger and I limited storage. 

Leave a Reply

Ask Your Question

* Required Fields