Part Numbers

U20-001-01U20-001-01-TI

HOBO 30-Foot Depth Water Level Data Logger

From $555.00 USD
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.

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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).

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
Country of Origin
United States

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

Image
Description: ce

The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

* 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%.

Compatible items

Carrying Case

CASE-PELICAN-1510
$265.00 USD
U20-CASE-1
$38.00 USD

Data Offload - Base Stations - Shuttles - Couplers

COUPLER2-B
$13.00 USD

Protective Enclosures

HOUSING-U2X
$49.00 USD

Stainless Steel Cable/Crimps

CABLE-1-300
$455.00 USD
CABLE-1-50
$95.00 USD
CABLE-1-CRIMP
$38.00 USD

Well Caps

WELL-CAP-01
$53.00 USD

Compliance Certificates

COMPLIANCE_CERT
$25.00 USD

Data Offload - Base Stations - Shuttles - Couplers

BASE-U-4
$140.00 USD
U-DTW-1
$280.00 USD

Graphing & Analysis

BHW-PRO-DLD
$75.00 USD
BHW-PRO-CD
$99.00 USD
BHW-PRO-USB
$99.00 USD

What's in the box

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

Documents

HOBO U20 Water Level Logger (U20-001-0x and U20-001-0x-Ti) User's Manual

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HOBO® U20 Water Level (U20-001-0x and U20-001-0x-Ti) Logger Quick Start

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U20 Water Level Loggers Data Sheet

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