

HOBO Motor On/Off Data Logger
Item Code: UX90-004
Overview
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.
Item number UX90-004M has been discontinued.
Features
- Dual internal motor sensors gives 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
TECHNICAL SPECIFICATION
AC Magnetic Field Threshold | >40 mGauss at 60 Hz |
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 |
Power Source | One 3V CR2032 lithium battery and USB cable |
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 |
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 |
Weight | 30g |

HOBO Motor On/Off Data Logger
Sale priceDhs. 555.00
Regular price (/)