HOBO Water Level Data Logger Deluxe Kit (30’) KIT-D-U20-01


Combining high accuracy water level measurements with out-of-the-box convenience, this money-saving kit includes everything needed to start logging right away.


Pressure Sensor

  • 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

* With accurate reference water level measurement and Barometric Compensation Assistant data ** Absolute pressure sensor accuracy includes all pressure drift, temperature, and hysteresis-induced errors † Maximum error due to rapid thermal changes is approximately 0.5%

Temperature Sensor
  • Operation range: -20° to 50°C (-4° to 122°F)
  • Accuracy: 0.37°C at 20°C (0.67°F at 68°F), see Plot A
  • Resolution: 0.1°C at 20°C (0.18°F at 68°F) (10-bit)
  • 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)
  • Dimensions: 2.46 cm (0.97 inches) diameter, 15 cm (5.9 inches) length; mounting hole 6.3 mm (0.25 inches) diameter
  • Weight: Approximately 210 g (7.4 oz)
  • Wetted materials: 316 stainless steel, Viton® o-rings, acetyl cap, ceramic sensor
  • Shock/drop: Logger is sensitive to shocks. Handle with care and avoid any impact. Always use proper packaging when shipping the logger.
  • 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 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.
  • Environmental Rating: IP68
The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).


  • Lightning protection; no long signal wires, and electronics are shielded in stainless-steel housing
  • HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density
  • Multiple-rate sampling allows faster sampling at critical times such as when pumping starts or stops
  • Available in four depth ranges
  • Ideal for use in wells, streams, lakes, wetlands, and tidal areas
  • No-vent-tube design for easy reliable deployment
  • Durable ceramic pressure sensor

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