HOBO 13-Foot Water Level Data Logger
Part Numbers

U20-001-04

U20-001-04-Ti

HOBO 13-Foot Water Level Data Logger

From $599.00 USD
Records water level and temperature up to 13-ft depths; narrow range provides best accuracy in shallow waters. 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

With its narrow range, this logger provides the best accuracy in shallow waters. A great value and easy deployment with no cumbersome vent tubes or desiccants to maintain.  Records water level and temperature up to 13-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
Specifications

Pressure and Water Level Measurements U20-001-04 and U20-001-04-Ti

Operation Range
0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) of water depth at sea level, or 0 to 7 m (0 to 23 ft) of water at 3,000 m (10,000 ft) of altitude
Factory Calibrated Range
69 to 145 kPa (10 to 21 psia), 0° to 40°C (32° to 104°F)
Burst Pressure
310 kPa (45 psia) or 18 m (60 ft) depth
0.6 cm (0.02 ft) water"
Typical error: ±0.075% FS, 0.3 cm (0.01 ft) water
Maximum error: ±0.15% FS
Raw Pressure Accuracy**
±0.3% FS, 0.43 kPa (0.063 psi) maximum error
Resolution
<0.014 kPa (0.002 psi), 0.14 cm (0.005 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%.
Image
CE Compliance Mark
Compatible items

Carrying Case

U20-CASE-1
$47.00 USD

Data Offload - Base Stations - Shuttles - Couplers

COUPLER2-B
$15.00 USD

Protective Enclosures

HOUSING-U2X
$57.00 USD

Stainless Steel Cable/Crimps

CABLE-1-300
$485.00 USD
CABLE-1-50
$105.00 USD
CABLE-1-CRIMP
$44.00 USD

Well Caps

WELL-CAP-01
$65.00 USD

Compliance Certificates

COMPLIANCE CERT
$30.00 USD

Data Offload - Base Stations - Shuttles - Couplers

BASE-U-4
$175.00 USD
U-DTW-1
$325.00 USD

Graphing & Analysis

BHW-PRO-DLD
$75.00 USD
BHW-PRO-USB
$99.00 USD
What's in the box
  • HOBO U20-001-04 or U20-001-04-Ti Water Level Data Logger (13-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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