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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

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  • 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.

  • 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. 

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