HOBO Motor On/Off Data Logger - eucatech Store
HOBO Motor On/Off Data Logger - eucatech Store
HOBO Motor On/Off Data Logger - eucatech Store
HOBO Motor On/Off Data Logger - eucatech Store


HOBO Motor On/Off Data Logger

Sale priceR 3,727.36
SKU: UX90-004



Records motor on/off conditions within an AC magnetic field with its internal sensor, or mechanical dry contact closures from external sensing devices. This logger is ideal for tracking the usage and runtimes of motors, pumps, compressors, and other equipment.



Data Sheet
User Manual


Highlighted Features

  • Dual internal motor sensors give better sensitivity 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
  • Compatible with HOBOware and HOBOware Pro software for logger setup and graphing & analysis


Specification Category Specification Detail
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
Internal Weak Pull-Up 100 KΩ
Input Impedance Solid state switch closure: 100 KΩ pull up
Resolution Pulse: 1 pulse, Runtime: 1 second, State and Event: 1 State or Event
Memory Modes Wrap when full or stop when full
Start Modes Immediate, push button, date & time, or next interval
Stop Modes When the memory full, push button, or date & time
Time Accuracy ±1 minute per month at 25°C (77°F) (see Plot A)
Power Source One 3V CR2032 lithium battery and USB cable
Battery Life 1 year, typical with logging intervals greater than 1 minute and normally open contacts
Memory UX90-004: 128 KB (84,650 measurements, maximum)
UX90-004M: 512 KB (346,795 measurements, maximum)
Download Type USB 2.0 interface
Full Memory Download Time 10 seconds for 128 KB; 30 seconds for 512 KB
Logger Operating Range Logging: -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
Launch/Readout: 0° to 50°C (32° to 122°F) per USB specification
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 3.66 x 8.48 x 1.52 cm / 1.44 x 3.34 x 0.6 in.
Weight 30 g / 1.06 oz
Environmental Rating IP50