HOBO UX90-004 Motor On/Off Data Logger

Model: UX90-004

Records motor on and off conditions within an AC magnetic field with its internal sensor or with external sensing devices it uses mechanical contact closures.

2 to 3 Weeks

$92.00 USD

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HOBO Data Loggers UX90-004 Offers

HOBO data loggers requires HOBOware software (USB interface cable included w/CD purchase) and a communications device.

With dual internal motor sensors it gives better sensitivity results for well shielded motors.


  • External input for measuring mechanical contact closures when signal strength is low
  • Auto-calibration of ON and OFF thresholds ensures reliable readings

Supported Measurements

  • Motor On/Off
  • Runtime
  • State Open/Closed


With the latest version of software (HOBOware 3.7.8), Optic Base Station and Waterproof Shuttle users will find much-improved communications methods.

For Mac users - Updating to apple's latest operating system (OS X 10.11.5) will remedy any communications issues you might have encountered with the HOBO U30 Weather Station and the Waterproof Shuttle.


HOBOmobile 1.5 for iOS can now push data to HOBOlink.com for free online data storage.

Download the Mobile App

HOBO Data Loggers UX90-004 Specifications

Internal Motor Sensor
AC magnetic field threshold > 40 mGauss at 60 Hz
External Input
External contact input Electronic solid state switch closure or logic driven voltage output
Range 0 to 3 V DC (USB powered), 0 to 2.5 V DC (battery powered)
Maximum state and runtime frequency 1 Hz
Solid state switch closure Input Low: < 10 KΩ; Input High: > 500 KΩ
Resolution Pulse: 1 pulse, Runtime: 1 second, State and Event: 1 State or Event
Battery life 1 year, typical with logging intervals greater than 1 minute and normally open contacts
Memory 128 KB (84,650 measurements, maximum)
Logger Operating Range -4° to 158°F(-20° to 70°C); 0 to 95% RH (non-condensing)
Environmental rating IP50
Click here for complete specifications on the HOBO UX90-004

What's included with the HOBO Data Loggers UX90-004X

  • Motor On/Off Data Logger
  • Command™ strip
  • Double-sided tape
  • Hook & loop strap


Click on a category to view a selection of compatible accessories with the HOBO UX90-004 Motor On/Off Data Logger.

USB data logger to PC communications cable at 6 feet long and is coated in black plastic.
$10.00 USD

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HOBO U-DT-1 U-Shuttle Data Transporter U-DT-1
Easily offload data in the field from your data loggers onto the device to transfer onto a host computer.
$281.00 USD

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HOBO CABLE-2.5-STEREO DC Voltage Input Sensor, 0 to 2.5V CABLE-2.5-STEREO
External input cable providing analog sensor input. For use with UX120 and U12 Series. The cable has 0.5" (13mm) tinned braided wire leads and a total length 6 ft. (1.8m).
$10.00 USD

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HOBO HOBOware Pro Software Compatible with Mac & Windows BHW-PRO-CD
Simple and easy to use point and click interface. This software is compatible with all HOBO data loggers and wireless data nodes. USB Cable included.
$99.00 USD

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