Descripción
HOBO by Onset U20-001-01 – 30-Foot Depth Fresh Water Level Data Logger
Accurate, affordable water level monitoring
- 30-Foot Depth – Freshwater
- No-vent-tube design for easy and reliable deployment
- Durable ceramic pressure sensor for reliable performance
- Calibration certificate included
The HOBO Water Level data logger features high accuracy at a great price and ease-of-use, with no cumbersome vent tubes or desiccants to maintain. This data logger is ideal for recording water levels and temperatures in shallow wells, streams, lakes and freshwater wetlands. For saltwater deployments, such as brackish wetlands and tidal areas, see HOBO U20 Water Level Titanium.
Important Info: This logger requires HOBOware Pro software and either a U-DTW-1 Waterproof Shuttle or the Base-U-4 Optic USB Base Station for configuration and data offload.
| U20 Series – Water Level Data Loggers | |
| U20-001-04 | HOBO 13-Foot Depth Fresh Water Level Data Logger |
| U20-001-04-Ti | HOBO 13-Foot Depth Titanium Water Level Data Logger |
| U20-001-01 | HOBO 30-Foot Depth Fresh Water Level Data Logger |
| U20-001-01-Ti | HOBO 30-Foot Depth Titanium Water Level Data Logger |
| U20-001-02 | HOBO 100-Foot Depth Fresh Water Level Data Logger |
| U20-001-02-Ti | HOBO 100-Foot Depth Titanium Water Level Data Logger |
| U20-001-03 | HOBO 250-Foot Depth Fresh Water Level Data Logger |
| U20-001-03-Ti | HOBO 250-Foot Depth Titanium Water Level Data Logger |
| KIT-D-U20-04 | HOBO Water Level Data Logger Deluxe Kit (13ft) |
| KIT-D-U20-01 | HOBO Water Level Data Logger Deluxe Kit (30ft) |
| KIT-D-U20-02 | HOBO Water Level Data Logger Deluxe Kit (100ft) |
| KIT-S-U20-02 | HOBO Water Level Data Logger Starter Kit (100ft) |
| KIT-S-U20-04 | HOBO Water Level Data Logger Starter Kit (13ft) |
| KIT-S-U20-01 | HOBO Water Level Data Logger Starter Kit (30ft) |
| U20L-01 | HOBO Water Level (30ft) Data Logger |
| U20L-02 | HOBO Water Level (100ft) Data Logger |
| U20L-04 | HOBO Water Level (13 ft) Data Logger |
Manufacturer Specs
| Pressure and Water Level Measurements | |
| Operation Range | 0 to 207 kPa (0 to 30 psia); approximately 0 to 9 m (0 to 30 ft) of water depth at sea level, or 0 to 12 m (0 to 40 ft) of water at 3,000 m (10,000 ft) of altitude |
| Factory Calibrated Range | 69 to 207 kPa (10 to 30 psia), 0° to 40°C (32° to 104°F) |
| Burst Pressure | 310 kPa (45 psia) or 18 m (60 ft) depth |
| Water Level Accuracy* | Typical error: ±0.05% FS, 0.5 cm (0.015 ft) water Maximum error: ±0.1% FS, 1.0 cm (0.03 ft) water |
| Raw Pressure Accuracy** | ±0.3% FS, 0.62 kPa (0.09 psi) maximum error |
| Resolution | <0.02 kPa (0.003 psi), 0.21 cm (0.007 ft) water |
| Pressure Response Time (90%)*** | <1 second; 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%) | 5 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 210 g (7.4 oz) |
| Dimensions | 2.46 cm (0.97 inches) diameter, 15 cm (5.9 inches) length; mounting hole 6.3 mm (0.25 inches) diameter |
| Wetted Materials | 316 stainless steel, Viton® o-rings, acetyl cap, ceramic sensor |
| 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 software manual |
| 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 |
| CE Compliant | 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 10 minutes in water to achieve full temperature compensation of the pressure sensor. Maximum error due to rapid thermal changes is approximately 0.5%.
Tech Specs
Test Equipment General Attributes |
|
|---|---|
| Unique Features | Lightning protection – no long signal wires, and electronics are shielded in stainless steel housing for use in freshwater 0-9 m (0-30 ft) 0-207 kPa (0-30 psia) |
| Safety Approval | CE |
| Product Weight | 210 GRAMS (0.463 LBS) |
| Data Logging | Yes |
| Calibration Included | NIST Calibration |
| Battery Type | AA |
| Power Supply Voltage | Battery Powered |
| Country of Origin | United States |
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