U20-001-01 Data Logger HOBO Temp/Water Level




625,00 €

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The HOBO Water Level data logger features high accuracy at a great price and ease-of-use, with no cumbersome vent tubes or desiccants to maintain. This data logger is ideal for recording water levels and temperatures in shallow wells, streams, lakes and freshwater wetlands.  For saltwater deployments, such as brackish wetlands and tidal areas, see HOBO U20 Water Level Titanium.

  • Lightning protection - no long signal wires, and electronics are shielded in stainless steel housing for use in freshwater (see the Water Level logger sensor location drawing)
  • HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure (see demo) temperature, and water density.
  • Multiple-rate sampling (see demo) allows faster sampling at critical times such as when pumping starts or stops.
  • Available in 4 depth ranges
  • Ideal for use in wells, streams, lakes, wetlands and tidal areas
  • No-vent-tube design for easy reliable deployment
  • Available in stainless and titanium versions
  • Durable ceramic pressure sensor
  • HOUSING-U2X optional protective enclosure for harsh environments

Environment: The U20-001-01 Data Logger is for use in Outdoor and Underwater environments

Measurements: The U20-001-01 Data Logger supports the following measurements: Temperature, Barometric Pressure, Water Level

Onset Data Loggers

Onset Computer Corporation

Pressure and Water Level Measurements U20-001-01 andU20-001-01-Ti
  Operation Range 0 to 207 kPa (0 to 30 psia); approximately 0 to 9 m (0 to 30 ft) of water depth at sea level, or 0 to 12 m (0 to 40 ft) of water at 3,000 m (10,000 ft) of altitude
  Factory Calibrated Range 69 to 207 kPa (10 to 30 psia), 0° to 40°C (32° to 104°F)
  Burst Pressure 310 kPa (45 psia) or 18 m (60 ft) depth
  Water Level Accuracy* Typical error: ±0.05% FS, 0.5 cm (0.015 ft) water 
Maximum error: ±0.1% FS, 1.0 cm (0.03 ft) water
  Raw Pressure Accuracy** ±0.3% FS, 0.62 kPa (0.09 psi) maximum error
  Resolution < 0.02 kPa (0.003 psi), 0.21 cm (0.007 ft) water
  Pressure Response Time (90%) < 1 second
  Thermal Response Time (90%)*** Approximately 10 minutes in water to achieve full temperature compensation of the pressure sensor


Temperature Measurements (All Models)
  Operation Range -20° to 50°C (-4° to 122°F)
  Accuracy ±0.44°C from 0° to 50°C (±0.79°F from 32° to 122°F), see Plot A
  Resolution 0.10°C at 25°C (0.18°F at 77°F), see Plot A
  Response Time (90%) 3.5 minutes in water (typical)
  Stability (Drift) 0.1°C (0.18°F) per year
  Real-time Clock ± 1 minute per month 0° to 50°C (32° to 122°F)
  Battery 2/3 AA, 3.6 Volt lithium, factory-replaceable
  Battery Life (Typical Use) 5 years with 1 minute or greater logging interval
  Memory (Non-volatile) 64K bytes memory (approx. 21,700 pressure and temperature samples)
  Weight Stainless steel models: approximately 210 g (7.4 oz)
Titanium models: approximately 140 g (4.8 oz)
  Dimensions 2.46 cm (0.97 inches) diameter, 15 cm (5.9 inches) length; mounting hole 6.3 mm (0.25 inches) diameter
  Wetted Materials Stainless Steel models: 316 stainless steel, Viton® o-rings, acetyl cap, ceramic sensor
Titanium models: Titanium, Viton o-rings, acetyl cap, ceramic sensor
  Logging Interval Fixed-rate or multiple logging intervals, with up to 8 user-defined logging intervals and durations; logging intervals from 1 second to 18 hours. Refer to the HOBOware software manual.
  Launch Modes Immediate start and delayed start
  Offload Modes Offload while logging; stop and offload
  Battery Indication Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.
* Water Level Accuracy: With accurate reference water level measurement and Barometric Compensation Assistant data
** Raw Pressure Accuracy: Absolute pressure sensor accuracy includes all pressure drift, temperature, and hysteresis-induced errors 
*** Thermal Response Time: Maximum error due to rapid thermal changes is approximately 0.5% 

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