Introducing the UX90 Time-of-Use Data Loggers
The HOBO UX90 Series is the industry's lowest-cost, most comprehensive family of "time-of-use" data loggers for measuring motor on/off status, electronic pulses, state changes, and occupancy and light use patterns.
Leveraging patent-pending technology, HOBO UX90 data loggers streamline energy audits, and make field deployment fast and reliable.
LCD displays Time On or % On, providing instant feedback on logger operation
Auto-calibration & signal strength indicator ensure proper logger deployment
84k or 346k measurement capacity enables longer deployments with fewer site visits
Rare Earth Magnets, 3M Command™ Strips, or mounting tabs for reliable mounting
Flexible logger Start and Stop options
On-Demand Webinar
Learn how HOBO UX90 loggers make it fast and easy to monitor equipment runtimes, room occupancy patterns, light usage, and more!
This webinar is ideal for building owners, facility managers, energy auditors, lighting contractors, and others looking for a simple, cost-effective way to measure energy use.
![]() |
Occupancy & Light UX90-006 (12 meters) UX90-005 (5 meters) $199 |
Monitors room occupancy and indoor light changes to identify occupancy patterns and determine energy usage and potential savings. |
![]() |
Motor On/Off UX90-004 $85 |
Records motor on and off conditions within an AC magnetic field with its internal sensor, or mechanical contact closures from external sensing devices. Track runtimes of motors, pumps, compressors, and other equipment. |
![]() |
Light On/Off UX90-002 $85 |
Monitors indoor light changes with an internal sensor and records light on and off conditions, making it ideal for building energy audits and light usage analysis. |
![]() |
State/Pulse/Event/Runtime UX90-001 $85 |
Records state changes, electronic pulses, and mechanical or electrical contact closures from external sensing devices. Monitor energy consumption, mechanical equipment operation, and water and gas flow. |




