HOBO Water Level (100 ft) Data Logger 0
Description
The HOBO U20L-002 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.
Feature
- Self-contained non-vented design enables easy deployment
- Ideal for use in both fresh and saltwater environments, including wells, streams, lakes, wetlands, and tidal areas
- Depths up to 100 feet
- Durable ceramic pressure sensor withstands freezing
- HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure (see demo), temperature, and water density
Note: A calibration certificate is not offered for this logger. If you require a NIST-traceable calibration certificate, please see theU20-001-02 (freshwater) or U20-001-02-Ti (saltwater).
Spesification
The country of origin for this
product is the United States. To see the full specifications for this
product, please see our product manual found under the documentation tab
if available.
| 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 | |
| Pressure Response Time (90%)*** | |
| 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 in manual |
| Resolution | 0.10°C at 25°C (0.18°F at 77°F), see Plot A in manual |
| 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. |
 |
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
* Water Level Accuracy: With accurate
reference water level measurement, known water density, accurate
Barometric Compensation Assistant data, and a stable temperature
environment.
** Raw Pressure Accuracy: Absolute
pressure sensor accuracy includes all sensor drift, temperature, and
hysteresis-induced errors.
*** Changes in Temperature: Allow 20
minutes in water to achieve full temperature compensation of the
pressure sensor. Maximum error due to rapid thermal changes is
approximately 0.5%.
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