The Onset HOBO U20L-01 is a non-vented water level logger that records absolute pressure and temperature in wells, streams, lakes, wetlands and tidal areas. It covers 0 to 207 kPa, about 0 to 9 m (30 ft) of water at sea level, with a typical water level error of ±0.1% FS (1.0 cm).
The HOBO U20L-01 Water Level Logger is used for monitoring changing water levels in a wide range of applications, including streams, lakes, wetlands, tidal areas and groundwater. It records absolute pressure and temperature, and HOBOware Pro software converts the pressure readings into water level readings using a reference water level, with compensation for temperature, fluid density and barometric pressure.
The logger features a ceramic pressure sensor, a durable polypropylene housing and a protective end cap for deployment in existing wells or stilling wells. Because it uses an absolute pressure sensor, there are no vent tubes or desiccants to maintain. The U20L-01 covers 0 to 207 kPa (0 to 30 psia), approximately 0 to 9 m (0 to 30 ft) of water depth at sea level, and with this smaller range it is also a good barometric reference for other water level loggers in the same area.
HOBOware Pro (version 3.5 or higher) is required for logger operation, together with a coupler (COUPLER2-C) and either the USB Optic Base Station (BASE-U-4) or the HOBO Waterproof Shuttle (U-DTW-1, firmware version 3.2.0 or later) for configuration and data offload. Note: a calibration certificate is not offered for this logger; if a NIST-traceable calibration certificate is required, see the HOBO U20 series.
| Manufacturer | Onset Computer Corporation (HOBO Data Loggers) |
|---|---|
| Model | U20L-01 |
| Pressure Operation Range (Absolute) | 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: ±0.1% FS, 1.0 cm (0.03 ft) water; maximum error: ±0.2% FS, 2.0 cm (0.06 ft) water (with accurate reference water level measurement, known water density, accurate Barometric Compensation Assistant data and a stable temperature environment) |
| Raw Pressure Accuracy | ±0.3% FS, 0.62 kPa (0.09 psi) maximum error (includes all sensor drift, temperature and hysteresis-induced errors) |
| Pressure Resolution | <0.02 kPa (0.003 psi), 0.21 cm (0.007 ft) water |
| Pressure Response Time (90%) | <1 second at a stable temperature; allow 20 minutes in water to achieve full temperature compensation of the pressure sensor |
| Pressure Sensor Drift | Less than 0.5% FS (worst case) per year |
| Temperature Operation Range | -20° to 50°C (-4° to 122°F) |
| Temperature Accuracy | ±0.44°C from 0° to 50°C (±0.79°F from 32° to 122°F) |
| Temperature Resolution | 0.10°C at 25°C (0.18°F at 77°F) |
| Temperature Response Time (90%) | 10 minutes in water (typical) |
| Temperature Stability (Drift) | 0.1°C (0.18°F) per year |
| 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) |
| 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 |
| 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 |
| Interface | Optical, via coupler (COUPLER2-C) with USB Optic Base Station (BASE-U-4) or HOBO Waterproof Shuttle (U-DTW-1) |
| Software | HOBOware Pro, version 3.5 or higher |
| Wetted Materials | Polypropylene housing and lanyard; Viton and Buna-N O-rings; ceramic sensor in acetal end cap; stainless steel screws suitable for saltwater |
| Environmental Rating | IP68 |
| Compliance | CE |
| Dimensions | 3.18 cm (1.25 inches) diameter, 15.24 cm (6.0 inches) length; mounting hole 6.3 mm (0.25 inches) diameter |
| Weight | Approximately 154 g (5.43 oz) in air; approximately 53.9 g (1.9 oz) in fresh water |
Your email address will not published. Required fieled are marked
Other related products explored by visitors
The maximum purchase for this product is () pieces.
العربية
English
