Onset
SKU: E-348-U20L-02
HOBO Water Level (100 ft) Data Logger
$688.00
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.
Important Info
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HOBO data loggers require HOBOware software (USB interface cable included w/CD purchase) and a communications device. HOBOware Pro is required when using the U-DTW-1 Waterproof shuttle. See compatible items below.
Overview
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. Helpful Links: Sensor location drawing Barometric Pressure Compensation Assistant Demo Multi-rate Sampling DemoHighlighted Features
- 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
In what environment does this data logger operate?
This data logger operates in outdoor and underwater environments.What measurements does this data logger support?
The U20L-02 data logger supports the following measurements: Absolute Pressure, Barometric Pressure, Temperature and Water LevelSpecifications
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| 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 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. |
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The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
Compatible Items
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SOFTWARE
Graphing & Analysis
- BHW-PRO HOBOware Pro CD or USB Drive (USB Cable Included) Software
- BHW-PRO-DLD HOBOware Pro - Mac/Win (Download Only) Software
- CASE-PELICAN-1510 Pelican Case
- U20-CASE-1 Water Level Data Logger Carrying Case
- COUPLER2-B Replacement Coupler for U20 Water Level Data Loggers Replacement
- HOUSING-U2X U2X Protective Housing
- CABLE-1-300 1/16" Stainless Steel Cable 300ft
- CABLE-1-50 1/16" Stainless Steel Cable 50ft
- CABLE-1-CRIMP Crimp Sleeve 12 Pack
- WELL-CAP-01 Well Cap
Video
+Attributes
+| Environment | Outdoor, Water |
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| Measurement | Water Temperature, Water Level, Absolute Pressure, Barometric Pressure |
| Communications | Optic/USB |
| Application | Construction Compliance, Environmental Compliance, Aquatic Ecology, Dam Management, Hydrology & Groundwater, Water Quality & Compliance, Watershed Management, Wetland & Stormwater, Ecology, Green Space |
| Product Solution | Stand-alone Data Loggers, Stand-alone Optical Data Loggers, Waterproof Stand-alone Data Loggers |
| Product Series | U20L |
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