U20L-02
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Availability date:
Environment of Use | Water |
Type of Logger | Portable |
Measured Parameters | Water level and temperature |
With Display | No |
IP Classification | IP68 |
Depth in meters | 0 - 30,6 m |
The HOBO U20L-02 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.
This data logger requires either the U-DTW-1 Waterproof Shuttle or the Base-U-4 Base Station for configuration and data offload, HOBOware software (free download). NOTE: HOBOware Pro is required when using the U-DTW-1 Waterproof Shuttle. See compatible items.
Environment:
The U20L-02 Data Logger is for use in Outdoor and Underwater environments
Measurements:
The U20L-02 Data Logger supports the following measurements: Temperature, Barometric Pressure, Water Level
IMPORTANT: HOBO data loggers require HOBOware software (USB interface cable included w/CD purchase) and a communications device. See compatible Software/Accessories.
Pressure (Absolute) and Water Level Measurements U20L-02 | |
Operation Range | 0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft) of water depth at sea level, or 0 to 33.6 m (0 to 111 ft) of water at 3,000 m (10,000 ft) of altitude |
Factory Calibrated Range | 69 to 400 kPa (10 to 58 psia), 0° to 40°C (32° to 104°F) |
Burst Pressure | 500 kPa (72.5 psia) or 40.8 m (134 ft) depth |
Water Level Accuracy* | Typical error: ±0.1% FS, 3.0 cm (0.1 ft) water Maximum error: ±0.2% FS, 6.0 cm (0.2 ft) water |
Raw Pressure Accuracy** | ±0.3% FS, 1.20 kPa (0.17 psi) maximum error |
Resolution | <0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) water |
Pressure Response Time (90%)*** | <1 second at a stable temperature; measurement accuracy also depends on temperature response time |
Temperature Measurements | |
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 |
Resolution | 0.10°C at 25°C (0.18°F at 77°F), see Plot A |
Response Time (90%) | 10 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 | Approximately 154 g (5.43 oz) in air Approximately 53.9 g (1.9 oz) in fresh water |
Dimensions | 3.18 cm (1.25 inches) diameter, 15.24 cm (6.0 inches) length; mounting hole 6.3 mm (0.25 inches) diameter |
Wetted Materials | Polypropylene housing and lanyard; Viton and Buna-N O-rings; ceramic sensor in acetyl end cap; stainless steel screws suitable for saltwater |
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 User’s Guide for details. |
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. |
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