HOBO State Data Logger

Part # U9-001
This product is discontinued.


The HOBO U9 State Data Logger monitors state changes using an internal magnetic reed switch for monitoring contact closures or current flow of remote devices or presence of positive DC voltages up to 15V.

Highlighted Features

  • Internal magnetic reed switch
  • External sensor cable included (CABLE-2.5-STEREO)
  • Records up to 43,000 state changes
  • Optional AC Current Switch (CSV-A8) to measure Motor on/off
  • Includes mounting kit with magnet, hook and loop tape, 3/8" double-sided

In what environment does this data logger operate?

This data logger operates in an indoor environment.

What measurements does this data logger support?

The U9-001 data logger supports the following measurements: Motor On/Off and State Open/Closed

The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available.

State Channel: External contact input: Passive relay switch or contact closure - minimum duration 1 second (open > 300 KΩ or closed < 15 KΩ)

U9-001 Plot AMax total cable run: 38 m (125 ft)

Time accuracy: Approximately ± 1 minute per month at 25°C (77°F); see Plot A

Operating temperature: 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

Memory: 64K bytes (up to 43,000 state changes)

Weight: 25 g (0.8 oz)

Dimensions: 45 x 60 x 20 mm (1.8 x 2.38 x 0.77 inches)

The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

Documentation for the U9-001