U20

U20(L) Water Level Dataloggers

The HOBO U20(L) family of dataloggers are low-cost, non-vented research-grade data loggers for continuously measuring water level and temperature.

The HOBO U20 is a high quality stainless steel or titanium pressure logger for research grade monitoring.

The HOBO U20L is a lower cost data logger featuring polypropylene housing suitable for use in both fresh and salt water.

Self-contained non-vented design enables easy deployment
Models available for use in both fresh and saltwater environments, including wells, streams, lakes, wetlands, and tidal areas
A range of models to measure depths up to 76 m
Durable ceramic pressure sensor withstands freezing
Use either an extra U20 (4m) level logger, a HOBO Weather Station, or import ASCII barometric data for barometric compensation when needed (one barometric data set can be used with all water level loggers in that area)
HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density
Optical/USB interface for years of reliable data offload in wet environments
Compatible with the HOBO Waterproof Shuttle for convenient in-field data readout and logger relaunch (can also be used as a base station)

Specifications

	U20-001-04 (-Ti)	U20-001-01 (-Ti)	U20-001-02 (-Ti)	U20-001-03 (-Ti)
Body materials:	Stainless steel or Titanium (-Ti)
NIST:	NIST Traceable Calibration Certificate Included
Operation Range:
kPa	0 to 145kPa	0 to 207kPa	0 to 400kPa	0 to 850kPa
psia	0 to 21 psia	0 to 30 psia	0 to 58 psia	0 to 123 psia
approx. water depth at SL	0 to 4 m	0 to 9 m	0 to 30 m	0 to 76 m
Burst Pressure	310 kPa; 18m	310 kPa; 18m	500 kPa; 40m	1200 kPa; 112m
Water Level Accuracy:
Typical:	±0.075% FS, 0.35 cm	±0.05% FS, 0.5 cm	±0.05% FS, 1.5 cm	±0.05% FS, 3.8 cm
Maximum:	±0.15% FS, 0.6 cm	±0.1% FS, 1.0 cm	±0.1% FS, 3.0 cm	±0.1% FS, 7.6 cm
Resolution:	<0.014 kPa (0.002 psi), 0.14 cm	<0.02 kPa (0.003 psi), 0.21 cm	<0.04 kPa (0.006 psi), 0.41 cm	<0.085 kPa (0.012 psi), 0.87 cm

Request information about this product

	Choosing a Water Level Logger: 5 Things You Should Know File Size 1.74MB Filename choosing_a_water_level_logger_wp.pdf Download
	U20 stainless brochure File Size 148KB Filename onset_hobo_u20_water_level_data_loggers.pdf Download
	U20L brochure File Size 209KB Filename onset-hobo-u20l-water-level-data-logger-series.pdf Download

U20L

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