HOBO Water Level Data Logger

Onset Data Logger for Measuring and Recording Water Levels and Temperature in Rivers, Streams and Wells
SKU
U20-001-01
$599.00
  • Measure and Log Water Level (Pressure) and Temperature Readings
  • -20°C to 50°C Temperature Measurement Range with ±0.44°C Accuracy
  • Factory-Replaceable 2/3 AA 3.6 Volt Lithium Battery with 5 Year Life @ 1 Minute Sampling Rate
  • No-Vent-Tube Design for Easy Reliable Deployment and Durable Ceramic Pressure Sensor
  • Available in 0 to 13 ft, 0 to 30ft, 0 to 100ft and 0 to 250ft Water Depth Ranges and Stainless Steel or Titanium Housing

Requires HOBOware Pro Software (Version 3.2+) and an Optic USB Base Station (BASE-U-4) or Shuttle Data Transporter (U-DTW-1)

Special order - please be advised that due to supply shortages, some items may require 6 weeks for shipment

Onset HOBO® U20 Water Level Data Logger Specifications

Data Channels 2 Channels (Water Level and Temperature)
Water Level (Pressure)
up to 13 ft Depth
Range: 0 to 4 m (0 to 13 ft); 0 to 145 kPa (0 to 21 psia)
Factory Calibrated Range**: 69 to 145 kPa (10 to 21 psia)
Water Level Accuracy***: 0.3cm (0.01 ft) water; ±0.075% FS
Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max
Resolution: 0.14 cm (0.005 ft), < 0.14 kPA (0.002 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
Water Level (Pressure)
up to 30 ft Depth
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
Water Level (Pressure)
up to 100ft Depth
Range*: 0 to 30 m (0 to 100 ft); 0 to 400 kPa (0 to 58 psia)
Factory Calibrated Range**: 69 to 400 kPa (10 to 58 psia)
Water Level Accuracy***: 1.5cm (0.05 ft) water; ±0.05% FS
Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max
Resolution: 0.41 cm (0.013 ft), < 0.04 kPA (0.006 psi)
Burst Pressure: 500 kPa (72.5 psia) or 40.8m (134 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
Water Level (Pressure)
up to 250ft Depth
Range*: 0 to 76 m (0 to 250 ft); 0 to 850 kPa (0 to 123 psia)
Factory Calibrated Range**: 69 to 850 kPa (10 to 123.3 psia)
Water Level Accuracy***: 3.8cm (0.125 ft) water; ±0.05% FS
Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max
Resolution: 0.87 cm (0.028 ft), < 0.085 kPA (0.012 psi)
Burst Pressure: 1200 kPa (174 psia) or 112m (368 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
Water Level (Pressure) Range: 0 to 4 m (0 to 13 ft); 0 to 145 kPa (0 to 21 psia)
Factory Calibrated Range**: 69 to 145 kPa (10 to 21 psia)
Water Level Accuracy***: 0.3cm (0.01 ft) water; ±0.075% FS
Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max
Resolution: 0.14 cm (0.005 ft), < 0.14 kPA (0.002 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 Approximately 21,700 Pressure and Temperature Total Readings
ampling 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
316 Stainless Steel or Titanium Housing
Software Compatibility HOBOware PRO Version 3.2+
OS Compatibility Windows: Windows 11, 10 and 7 (32 and 64-Bit)
Mac: OS X 10.9.x, 10.10.x and 10.11.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
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