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HOBO™ State, Event, Pulse and Runtime Data Logger

HOBO™ State, Event, Pulse and Runtime Data Logger



Onset UX90 Time of Use Data Logger Recording State, Events and Runtime Monitoring up to 1 Hz Sampling


  • Accepts (1) State, Pulse, Event or Runtime Input Sensor
  • Stores 86,650 or 346,795 (w/ Extended Memory Option) Measured Reading
  • State, Event and Runtime Data Sampling up to 1 Hz
  • Accepts a Contact Closure Input or Optional AC Current Switch (CSV-A8)
  • Includes Input Cable, Command™ Strip, Double-Sided Tape, Hook & Loop Strap and Magnet. Software Available as A Download


Data Channels 1 External Input Accepting Event, Kilowatt Hours, Motor On/Off, Pulse Input, Runtime, State Open/Close and Waterflow Sensor
Pulse Maximum Frequency: 50 Hz 
Resolution: 1 Pulse
Lock Out Time: 0 to 1 Second in 100 ms Steps
Event Maximum Frequency: 1 Hz 
Resolution: 1 Event 
Lock Out Time: 0 to 1 Second in 100 ms Steps
State Maximum Frequency: 1 Hz
Resolution: 1 State Change
Run Time Maximum Frequency: 1 Hz
Resolution: 1 Second
Sampling Rate 1 Second to 18 Hours, 12 Minutes, 15 Seconds
Data Storage Capacity UX90-001: 84,650 Measurements
UX90-001M: 346,795 Measurements
External Contact Input Electronic Solid State Switch Closure or Logic Driven Digital Signals to 24 Volts
Contact Input Range USB Powered: 0 Volts DC to 3 Volts DC 
Battery Powered: 0 Volts DC to 2.5 Volts DC
Solid State Switch Closure Input Low: Input High: > 500KΩ
Internal Weak Pull-Up 100 KΩ
Download Time UX90-001: 10 Seconds When Full
UX90-001M: 30 Seconds When Full
Input Impedance Solid State Switch Closure: 100KΩ Pull Up
Power Source (1) CR2032 Lithium Coin Cell Battery
Battery Life 1 Year
Note: Logging @ 1 Minute and Normally Open Contacts
LCD Display Readings Visible in 0°C to 50°C (32°F to 122°F) Range
Note: Display may React Slowly or Go Blank in Temperatures Outside Range
Display Shows: Logger Status; Battery Level Status; Storage Capacity; Calibration Status; Current Time
Communication Type USB Cable Connects Data Logger to PC Computer
Operating Range Temperature: -20°C to 70°C (-4°F to 158°F)
Humidity:0 to 95% RH (Non-Condensing)
Time Accuracy ±1 Minute per Month @ 25°C (77°F)
OS Compatibility Windows: Windows 8, 7, Vista and XP (32-Bit and 64-Bit)
Mac: OS X 10.6.x, 10.7.x and 10.8.x
Standards Compliance CE, IP50
Weight 23 g (0.81 oz)
Dimensions 3.66 cm x 5.94 cm x 1.52 cm (1.44" x 2.34" x 0.6")