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HOBO 30-Foot Depth Water Level Data Logger

Records water level and temperature up to 30-ft depths with no cumbersome vent tubes or desiccants to maintain. Available in stainless-steel for shallow wells, streams, lakes, and freshwater wetlands and in titanium for saltwater/brackish wetlands and tidal areas.

Important Information

Requires HOBOware Pro software and either a U-DTW-1 Waterproof Shuttle or the Base-U-4 Optic USB Base Station for configuration and data offload. Please see compatible items below.

CHF 749.00

SKU

U20-001-01

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Details

Technische Daten

Datenblatt

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Overview

Featuring high accuracy at a great price and ease-of-use, with no cumbersome vent tubes or desiccants to maintain, this logger is ideal for recording water level and temperature up to 30-ft depths in shallow wells, streams, lakes, freshwater wetlands (stainless-steel), saltwater/brackish wetlands and tidal areas (titanium).

U20 Sensor Location

Features

Lightning protection - no long signal wires, and electronics are shielded in a metal 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
Available in stainless and titanium versions
Durable ceramic pressure sensor
3-point NIST-traceable calibration certificate included

What's in the box

HOBO U20-001-01 or U20-001-01-Ti Water Level Data Logger (30-foot depth)

Specifications

Pressure and Water Level Measurements U20-001-01 and U20-001-01-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; measurement accuracy also depends on temperature response time

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 in manual
Resolution: 0.10°C at 25°C (0.18°F at 77°F), see Plot A in manual
Response Time (90%): 5 minutes in water (typical)
Stability (Drift): 0.1°C (0.18°F) per year

Logger

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: 316 stainless steel, 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.
Environmental Rating: IP68

: * Water Level Accuracy: With accurate reference water level measurement, known water density, accurate Barometric Compensation Assistant data, and a stable temperature environment.

** Raw Pressure Accuracy: Absolute pressure sensor accuracy includes all sensor drift, temperature, and hysteresis-induced errors.

*** Changes in Temperature: Allow 10 minutes in water to achieve full temperature compensation of the pressure sensor. Maximum error due to rapid thermal changes is approximately 0.5%.