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Onset HOBO Standard Water Level Kit Temperature and Water Level Measurements

Onset HOBO Standard Water Level Kit Temperature and Water Level Measurements



Temperature and Water Level Measurements


  • Measure and Log Water Level and Temperature Readings at a Depth up to 13, 30 or 100ft
  • A non-Vent Tube Design Allows for Easy Deployment
  • (8) User-Defined Logging Intervals Over an 1 Second to 18 Hour Sampling Rate
  • Stainless Steel Housing with Lightning Protection Shields Electronics
  • Factory-Replaceable 5-Year 2/3 AA Lithium Battery


Data Channels 2 Channels (Water Level and Temperature)
Water Level (Pressure) Range*: 0 to 9 m (0 to 30 ft); 0 to 207 kPa (0 to 30 psia) 
Factory Calibrated Range**: 69 to 207 kPa (10 to 30 psia)
Water Level Accuracy***: 0.5cm (0.015 ft) water; ±0.05% FS
Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max
Resolution: 0.21 cm (0.007 ft), < 0.02 kPA (0.003 psi)
Burst Pressure: 310 kPa (45 psia) or 18m (60 ft) depth
Response Time (Pressure): < 1 Second to 90%
Response Time (Thermal): About 10 Minutes in Water to Achieve Full Temperature Compensation of the Pressure Sensor
* Nominal Values at Sea Level 
** @ 0°C to 40°C Temperature Range
*** Typical Maximum Error Over the Full Temperature and Pressure Calibrated Range
Temperature Range: -20°C to 50°C (-4°F to 122°F)
Accuracy: ±0.37°C @ 20°C; ±0.5°C @ -5°C to 50°C
Resolution: 0.1°C @ 20°C; 0.2°C @ -5°C to 50°C
Response Time: 3.5 Minutes in Water to 90%
Stability (Drift): ≤0.1°C/year (≤0.18°F/year)
Data Storage Capacity 21,700 Total Readings (10,850 Pressure and Temperature)
Sampling Rate 1 Second to 18 Hours (User-Specified)
Up to 8 Sampling Intervals User-Defined
Battery 2/3 AA 3.6 Volt Lithium Battery - Factory Replaceable
Battery Life 5 Years @ 1 Minute Sampling Rate 
(Dependant Upon Environment and Operating Range)
Battery Status Indication Battery status displayed at launch or with status screen; Battery voltage can be logged
Environment Waterproof; suitable for deployment in water or air, case materials resistant to fuels, solvents and lubricants. Titanium version recommended for saltwater deployments.
Operating Range Temperature: -20°C to 50°C (4°F to 122°F)
Sample & Event Logging Samples: Recorded Sensor Measurements
Events: Logger Activity (ie: Bad Battery, Host Connected)
Wetted Materials Vitron® O-Rings, Acetyle Cap and Ceramic Sensor
U20-001-01 Housing: 316 Stainless Steel
U20-001-01-TI Housing: Titanium
Software Compatibility HOBOWare Pro Version 3.2+
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
Operation Indicator Red LED in Communications Window
Start Modes Immediate Start, Programmable Start Time/Date
Offload Modes Offload while logging or stop and offload
Real-Time Clock ±1 minute per month 0°C to 50°C (32°F to 122°F)
Standards Compliance CE
Weight 210 g (7.4 oz)
Dimensions Logger: 24.6mm D x 150mm L (0.97" D x 5.9" L)
Mounting Hole: 6.3mm (0.25") Diameter