Features
- Ideal for use in wells, streams, lakes, wetlands and tidal areas
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Available in 4 depth ranges, 4m, 9m, 30m and 76m
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No-vent-tube design for easy and reliable deployment
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Available in stainless steel and titanium* versions
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Durable ceramic pressure sensor for reliable performance
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3-point NIST-traceable Calibration certificate included
- Lightning protection - no long signal wires, and electronics are shielded in a Titanium housing
- Multiple-rate sampling allows faster sampling at critical times
Overview
The Titanium version of the U20 Water Level Logger is recommended for saltwater deployment to record water levels and temperatures in wetlands and tidal areas. This data logger features high accuracy at a great price and ease-of-use, with no cumbersome vent tubes or desiccants to maintain.
When combined with HOBOware Pro software, the system provides easy conversion to accurate water level readings, fully compensated for barometric pressure, temperature, and water density.
Technical
Pressure and Water Level Measurements
Range (resolution): 0 to 4m (0.14cm), 0 to 9m (0.21cm), 0 to 30.6m (0.41cm), 0 to 76.5m (0.87 cm)
Water Level Accuracy: Typical error: ±0.05% FS, Maximum error: ±0.1% FS
Raw Pressure Accuracy: ±0.3% FS
Pressure Response Time (90%): <1 second; measurement accuracy also depends on temperature response time
Temperature
Range: -20° to 50°C
Accuracy: ±0.44°C
Resolution: 0.10°C at 25°C
Response Time (90%): 5 minutes in water (typical)
Stability (Drift): 0.1°C per year
Logger
Real-time Clock: ± 1 minute per month
Battery: 2/3 AA, 3.6 Volt lithium, factory-replaceable
Battery Life: 5 years with 1 minute or greater logging interval
Memory (Non-volatile): 64K
Weight: Stainless steel models: approximately 210g, Titanium models: approximately 140g
Dimensions: 2.46 cm diameter, 15 cm length;
Wetted Materials: Titanium, Viton® o-rings, acetyl cap, ceramic sensor
Logging Interval: Fixed-rate or multiple logging intervals
Launch Modes: Immediate and delayed start
Offload Modes: Offload while logging; stop and offload