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HOBO® U20 Series Water Level Loggers
Accurate, affordable water level monitoring
HOBO Water Level data loggers offer high accuracy
at an affordable price, with no cumbersome vent
tubes or desiccants to maintain. These data loggers
are ideal for recording water levels and temperatures
in wells, streams, lakes, wetlands and tidal estuaries.
Supported Measurements: Water Level, Barometric
Pressure, Pressure (Absolute), Temperature
Key Advantages:
• Available in 4 depth ranges
• No-vent-tube design for easy and reliable deployment
• Available in stainless steel and titanium* versions
• Durable ceramic pressure sensor for reliable performance
• Calibration certificate included
Minimum System Requirements:
Software
Base Station
1
Coupler
2
Water Level Logger Kits:
Deluxe Kit includes a carrying case, two HOBO Water Level Loggers (one 13
foot for barometric pressure and one 13 foot, 30 foot, or 100 foot), HOBOware
Pro software, and a HOBO Waterproof Data Shuttle with coupler. The Starter Kit
includes a HOBO Water Level Logger, HOBOware Pro Software, and an Optic USB
Base Station. Available in 13 foot, 30 foot, and 100 foot depths.
Deluxe Kit
Starter Kit
*Titanium version recommended for saltwater deployment.
1
HOBO Base Station or HOBO Waterproof Shuttle required.
2
Coupler included with HOBO Base Station or HOBO Waterproof Shuttle.
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For complete information and accessories, please visit: www.onsetcomp.com
Part number
Range
Factory Calibrated
Range (0° to 40°C;
32° to 104°F)
Water Level Accuracy
(Typical Error)
Resolution 0.14 cm (0.005 ft) 0.21 cm (0.007 ft) 0.41 cm (0.013 ft) 0.87 cm (0.028 ft)
Burst Pressure
Range -20° to 50°C (-4° to 122°F)
Accuracy ± 0.37° @ 20°C (± 0.67° @ 68°F) ± 0.44° from 0° to 50°C (± 0.79° from 32° to 122°F)
Resolution (10 bit) 0.1° @ 20°C (0.18° @ 68°F)
Response time 5 minutes (to 90% in water)
Dimensions 2.46 cm diameter x 15 cm (0.97 x 5.9 in) hole in mounting bail 6.3 mm (0.25 in)
CE compliant Yes
U20-001-04/
U20-001-04-Ti
HOBO Water Level Specications
0-4 m (0-13 ft)
0-145 kPa (0-21 psia)
69 to 145 kPa
(10-21 psia)
± 0.3 cm (0.01 ft)
(± 0.075% FS)
310 kPa (45 psia)
18 m (60 ft) depth
Temperature Specications (all models)
U20-001-01/
U20-001-01-Ti
0-9 m (0-30 ft)
0-207 kPa (0-30 psia)
69 to 207 kPa
(10-30 psia)
± 0.5 cm (0.015 ft)
(± 0.05% FS)
U20-001-02/
U20-001-02-Ti
0-30 m (0-100 ft)
0-400 kPa (0-58 psia)
69 to 400 kPa
(10-58 psia)
± 1.5 cm (0.05 ft)
(± 0.05% FS)
500 kPa (72.5 psia)
40.8 m (134 ft) depth
U20-001-03/
U20-001-03-Ti
0-76 m (0-250 ft)
0-850 kPa (0-123 psia)
69 to 850 kPa
(10-123 psia)
± 3.8 cm (0.125 ft)
(± 0.05% FS)
1200 kPa (174 psia)
112 m (368 ft) depth
Contact Us
Sales (8am to 5pm ET, Monday through Friday)
Email sales@onsetcomp.com
Call 1-508-759-9500
In U.S. toll free 1-800-564-4377
Fax 1-508-759-9100
Technical Support (8am to 8pm ET, Monday through Friday)
Contact Product Support onsetcomp.com/support/contact
Call 1-508-759-9500
In U.S. toll free 1-877-564-4377
Onset Computer Corporation
470 MacArthur Boulevard
Bourne, MA 02532
Copyright© 2016 Onset Computer Corporation. All rights reserved. Onset, HOBO, HOBOware are registered trademarks of Onset Computer Corporation. Other
products and brand names may be trademarks or registered trademarks of their respective owners. Patented technology (U.S. Patent 6,826,664) MKT1152-0229
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