Onset HOBO UX90 Light On/Off Data Logger
Features
- Auto-calibration of ON and OFF thresholds
- User-adjustable sensitivity control for low/high light level conditions
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Onset HOBO UX90 Light on/off logger monitors indoor light changes with an internal sensor and records light on/off conditions; ideal for building energy audits and light usage analysis.
Memory
This logger is available in a standard 128 KB memory model (UX90-002) capable of 84,650 measurements and an expanded 512KB memory version (UX90-002M) capable of over 346,795 measurements.
Light Threshold |
> 65 lux |
Light Type |
LED, CFL, fluorescent, HID, incandescent, natural |
Start Modes |
Immediate, push button, date & time, or next interval |
Stop Modes |
When memory full, push button, or date & time |
Power Source |
One 3V CR2032 lithium battery and USB cable |
Battery Life |
1 year typical use |
Memory |
UX90-002: 128 KB (84,650 measurements, maximum) UX90-002M: 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 5.94 x 1.52 cm (1.44 x 2.34 x 0.6 in.)
|
Weight |
23 g (0.81 oz)
|
Environmental Rating |
IP50 |
Memory Modes |
Wrap when full or stop when full |
- HOBO UX90-002x Light On/Off Data Logger
- Command™ strip
- Double-sided tape
- Hook & loop strap
In The News
Expanding the Port Everglades: Real-Time Monitoring of Water Quality Conditions from Planned Dredging Operation
The Port Everglades in Broward County, Florida, serves large trade vessels and cruiseliners and incoming and outgoing recreational boaters. However, as cargo ships become larger, the port must expand. 
 
A dredging project led by the US Army Corps of Engineers will substantially deepen and widen the port's navigation channel to accommodate larger Panamax cargo ships and modern cruise liners. 
 
As a result of this project, a large amount of sediment will be displaced into the water column. This suspended sediment may settle outside of the project area, burying benthic organisms like corals, and possibly carrying harmful particulates to other regions. 
 
[caption id="attachment_39497" align="aligncenter" width="2560"] A CB-950 and CB-25 deployed on site at Port Everglades.
Read MoreIt’s Time to React to Water Quality: Proteus Multiparameter Probe aboard NexSens Buoy
Water quality monitoring is essential for safeguarding public health, protecting ecosystems, and ensuring the sustainability of water resources. Contaminants such as industrial pollutants, agricultural runoff, and sewage discharge can severely impact aquatic life and pose serious risks to human health if left unchecked. 
 
Traditionally, water quality monitoring has been a slow and labor-intensive process, requiring samples to be collected, transported to a lab, and analyzed—a process that can take days. 
 
However, with the advancement of real-time sensor technology, environmental agencies, researchers, and industries can now monitor water quality instantly.
Read MoreSafeguarding Communities with Real-Time Flood Monitoring in the City of Hazelwood
The City of Hazelwood is a suburb in St. Louis County, Missouri, home to around 25,500 people. Recently, the community has suffered increased flash flooding following severe storms, prompting the need for the installation of a flood monitoring system. 
 
In 2022, a NexSens X2 data logger was installed to monitor water level and rainfall in real-time, with the aim of reducing the loss of life and property as a result of extreme weather events. 
 
[caption id="attachment_39411" align="alignnone" width="940"] The latest flood event at Coldwater Creek, where the water level rose by 14 feet, exceeding the height of the X2 by three feet. The sensor can be seen behind the wall that usually contains the Creek.
Read More