HOBO Water Level Logger - Model: U20-001-01

Onset’s new HOBO Water Level Data Logger features high accuracy at a great price, and HOBO ease-of-use. It is ideal for recording water levels and temperatures in wells, streams, lakes, wetlands and tidal areas.** The completely self-contained logger means there are no cumbersome vent tubes or desiccants to maintain. The Water Level logger can also be used in air to record barometric pressure data for accurate compensation when needed.

Requires HOBOware Software & Base Station

Features

• HOBOware™ software provides easy conversion to accurate water level readings, fully compensated for barometric pressure, temperature and water density
• Use either a second water level logger or a HOBO Weather Station for barometric compensation when needed (one barometric data set can be used with all water level loggers in that area)
• HOBOware provides comprehensive graphing, analysis and reporting
• No-vent-tube design eliminates installation/maintenance issues and errors associated with vent tubes, such as bulkiness, desiccant maintenance, water in tubes, cuts, and decontamination between deployments.
• Fully sealed housing insures many years of trouble-free operation
• Optical/USB interface for years of reliable data offload in wet environments—no mechanical or elastomer connectors to fail
• Streamlined housing for snag-free deployment in wells
• Lightning protection—no long signal wires, and electronics are shielded in stainless steel housing
• Durable ceramic pressure sensor
• Simple wireline mounting makes it easy to hang logger in wells, hidden from vandals
• Multiple-rate sampling allows faster sampling at critical times such as when pumping starts or stops
• Includes calibration certificate of accuracy versus NIST-traceable standards at three pressure points (15, 21 and 29 psia)
• Patented technology (U.S. Patent 6,826,664)
• Additional Logger Specifications

Water Level Measurement

• Range: 9 m (30 ft); 0-207 kPa (0-30 psia)
• Factory Calibrated Range 69 to 207 kPa (10 to 30 psia); 0° to 40°C (32° to 104°F)
• Typical Accuracy: ±2.1cm (0.07 ft); <0.1% of full-scale pressure over full temperature and pressure calibrated range
• Resolution: 0.21 cm (0.007 ft); <better than 0.01% full-scale pressure
• Burst Pressure: 310 kPa (45 psia); 18 m (60 ft) depth

Note: all depth specifications assume use in water at sea level.

Temperature Measurement

• Range: -20° to 50°C (-4° to 122°F)
• Accuracy ±0.37°C at 20°C (0.67°F at 68°F); ±0.5°C (0.9°F) over -5° to 50°C (23° to 122°F)
• Resolution: 0.1°C @ 20°C (0.18°F at 68°F); 10-bit; 0.2°C (0.36°F) over -5° to 50°C (23° to 122°F)
• Response Time: 3.5 minutes in water, typical to 90%
• Stability (Drift) ≤0.1°C/year (0.18°F/year)