The HOBO U11 3-State/1-Event Data Logger lets you simultaneously monitor and log state changes in up to three locations plus one time/date-stamped event. The three state and one event channels monitor contact closures or openings driven by external sensors mounted on motors, doors, or other cycling equipment. If you're not sure which data logger you need for your application please view Choosing Between a State and Event Data Logger.
Choice of four models that record state changes, lights on/off, motor run-times, and/or events
Internal light, motor, and magnetic reed switch sensors
State and event channels with external inputs provide extra reliability
Measurement: State Open/Closed,Event
State and Event Channels: External contact input: Passive relay switch or contact closure - minimum duration 1 second (open > 300 KΩ or closed < 10 KΩ)
Max total cable run: 32 m (105 ft); if using only state channels, 64 m (210 ft)
Time accuracy: Approximately ± 1 minute per month at 25°C (77°F), see Plot A
Logging: -20° to 70°C (-4° to 158°F)
Launch/readout: 0° to 50°C (32° to 122°F), per USB specification
Humidity range: 0 to 95% RH, non-condensing
Battery life: 1 year typical use with normally open contacts; two months if all four channels are logging with continuously closed contacts
Memory: 64K bytes (up to 43,000 state changes or events)
Weight: 50 g (1.8 oz)
Dimensions: 58 x 74 x 22 mm (2.3 x 2.9 x 0.9 inches)
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).