HOBO Water Level Data Logger Starter Kit (30’) KIT-S-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 (use barometric pressure data from nearby weather station).
  • 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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