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Part Numbers
U20-001-02
•U20-001-02-Ti
HOBO 100-Foot Depth Water Level Data Logger
From $649.00 USD
Records water level and temperature up to 100-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.
Get your same trusted data via Bluetooth—No shuttles, for less!
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.
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 100-ft depths. Available in stainless-steel for shallow wells, streams, lakes, and freshwater wetlands and in titanium for saltwater/brackish wetlands and tidal areas.
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
Specifications
Pressure and Water Level Measurements U20-001-02 and U20-001-02-Ti
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0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft) of water depth at sea level, or 0 to 33.6 m (0 to 111 ft) of water at 3,000 m (10,000 ft) of altitude
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69 to 400 kPa (10 to 58 psia), 0° to 40°C (32° to 104°F)
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500 kPa (72.5 psia) or 40.8 m (134 ft) depth
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Typical error: ±0.05% FS, 1.5 cm (0.05 ft) water
Maximum error: ±0.1% FS, 3 cm (0.1 ft) water
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±0.3% FS, 1.20 kPa (0.17 psi) maximum error
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<0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) water
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<1 second; measurement accuracy also depends on temperature response time
Operation Range
Factory Calibrated Range
Burst Pressure
Water Level Accuracy*
Raw Pressure Accuracy**
Resolution
Pressure Response Time (90%)***
Temperature Measurements (All Models)
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-20° to 50°C-4° to 122°F
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±0.44°C from 0° to 50°C (±0.79°F from 32° to 122°F), see Plot A in manual
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0.10°C at 25°C (0.18°F at 77°F), see Plot A in manual
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5 minutes in water (typical)
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0.1°C (0.18°F) per year
Operation Range
Accuracy
Resolution
Response Time (90%)
Stability (Drift)
Logger
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± 1 minute per month 0° to 50°C32° to 122°F
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2/3 AA, 3.6 Volt lithium, factory-replaceable
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5 years with 1 minute or greater logging interval
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64K bytes memory (approx. 21,700 pressure and temperature samples)
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Stainless steel models: approximately 210 g (7.4 oz)
Titanium models: approximately 140 g (4.8 oz)"
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2.46 cm (0.97 inches) diameter, 15 cm (5.9 inches) length; mounting hole 6.3 mm (0.25 inches) diameter
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316 stainless steel, Viton® o-rings, acetyl cap, ceramic sensor
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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.
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Immediate start and delayed start
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Offload while logging; stop and offload
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Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.
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IP68
Real-time Clock
Battery
Battery Life (Typical Use)
Memory (Non-volatile)
Weight
Dimensions
Wetted Materials
Logging Interval
Launch Modes
Offload Modes
Battery Indication
Environmental Rating
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* 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%.
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Compatible items
Data Offload - Base Stations - Shuttles - Couplers
Protective Enclosures
Stainless Steel Cable/Crimps
Well Caps
Compliance Certificates
Accessories
Graphing & Analysis
What's in the box
- HOBO U20-001-02 or U20-001-02-Ti Water Level Data Logger (100-foot depth)
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