- Sign In
- |
- Sign Up
- |
- My Quote (0)
- |
- CART (0)
Specific, Convenient Data Collection & Storage
Research-grade and designed for accurate results, this water level data logger continuously measures water levels and temperatures in many underwater environments. With polypropylene housing for fresh and saltwater use, this data logger also features a non-vented design and a 0 to 13' (0 to 4 m) range.
Research-grade and designed for accurate results, this water level data logger continuously measures water levels and temperatures in many underwater environments. With polypropylene housing for fresh and saltwater use, this data logger also features a non-vented design and a 0 to 13' (0 to 4 m) range.
An economical and research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. Features 0.1% measurement accuracy, a polypropylene housing for use in both fresh and saltwater, and a non-vented design for convenient and hassle-free deployment.
Note: This logger requires HOBOware Pro software and either a U-DTW-1 Waterproof Shuttle or the Base-U-4 Optic USB Base Station (sold separately) for configuration and data offload.
Features
In what environment does this data logger operate?
Supported Measurements
Applications
| Pressure (Absolute) and Water Level Measurements | |
| Operation Range | 0 to 145 kPa (0 to 21 psia); approximately 0 to 13' (0 to 4 m) of water depth at sea level, or 0 to 23' (0 to 7 m) of water at 10,000' (3000 m) of altitude |
| Factory Calibrated Range | 69 to 145 kPa (10 to 21 psia), 32 to 104°F (0 to 40°C) |
| Burst Pressure | 310 kPa (45 psia) or 60' (18 m) depth |
| Water Level Accuracy* | Typical error: ±0.1% FS, 0.013' (0.4 cm) water Maximum error: ±0.2% FS, 0.026' (0.8 cm) water |
| Raw Pressure Accuracy** | ±0.3% FS, 0.43 kPa (0.063 psi) maximum error |
| Resolution | <0.014 kPa (0.002 psi), 0.005' (0.14 cm) water |
| Pressure Response Time (90%)*** | <1 second at a stable temperature; measurement accuracy also depends on temperature response time |
| Temperature Measurements | |
| Operation Range | -4 to 122°F (-20 to 50°C) |
| Accuracy | ±0.79°F from 32 to 122°F (±0.44°C from 0 to 50°C) |
| Resolution | 0.18°F at 77°F (0.10°C at 25°C) |
| Response Time (90%) | 10 minutes in water (typical) |
| Stability (Drift) | 0.18°F (0.1°C) per year |
| Logger | |
| Real-time Clock | ±1 minute per month 32 to 122°F (0 to 50°C) |
| Battery | Type: 2/3 x AA, 3.6 V lithium, factory-replaceable Life (typical use): 5 years with 1 minute or greater logging interval |
| Memory (Non-volatile) | 64 KB memory (approximately 21,700 pressure and temperature samples) |
| 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 |
| Modes | Launch: Immediate start and delayed start Offload: Offload while logging; stop and offload |
| Environmental Rating | IP68 |
| Dimensions | 1.25" (3.18 cm) diameter, 6" (15.24 cm) length; mounting hole 0.25" (6.3 mm) diameter |
| Weight | Approximately 5.43 oz (154 g) in air; approximately 1.9 oz (53.9 g) in fresh water |
*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%.
Click here for complete specifications on the Onset HOBO U20L-04Click on a category to view a selection of compatible accessories with the Onset HOBO U20L-04 Water Level Data Logger, 13'.
| Pressure (Absolute) and Water Level Measurements | |
| Operation Range | 0 to 145 kPa (0 to 21 psia); approximately 0 to 13' (0 to 4 m) of water depth at sea level, or 0 to 23' (0 to 7 m) of water at 10,000' (3000 m) of altitude |
| Factory Calibrated Range | 69 to 145 kPa (10 to 21 psia), 32 to 104°F (0 to 40°C) |
| Burst Pressure | 310 kPa (45 psia) or 60' (18 m) depth |
| Water Level Accuracy* | Typical error: ±0.1% FS, 0.013' (0.4 cm) water Maximum error: ±0.2% FS, 0.026' (0.8 cm) water |
| Raw Pressure Accuracy** | ±0.3% FS, 0.43 kPa (0.063 psi) maximum error |
| Resolution | <0.014 kPa (0.002 psi), 0.005' (0.14 cm) water |
| Pressure Response Time (90%)*** | <1 second at a stable temperature; measurement accuracy also depends on temperature response time |
| Temperature Measurements | |
| Operation Range | -4 to 122°F (-20 to 50°C) |
| Accuracy | ±0.79°F from 32 to 122°F (±0.44°C from 0 to 50°C) |
| Resolution | 0.18°F at 77°F (0.10°C at 25°C) |
| Response Time (90%) | 10 minutes in water (typical) |
| Stability (Drift) | 0.18°F (0.1°C) per year |
| Logger | |
| Real-time Clock | ±1 minute per month 32 to 122°F (0 to 50°C) |
| Battery | Type: 2/3 x AA, 3.6 V lithium, factory-replaceable Life (typical use): 5 years with 1 minute or greater logging interval |
| Memory (Non-volatile) | 64 KB memory (approximately 21,700 pressure and temperature samples) |
| 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 |
| Modes | Launch: Immediate start and delayed start Offload: Offload while logging; stop and offload |
| Environmental Rating | IP68 |
| Dimensions | 1.25" (3.18 cm) diameter, 6" (15.24 cm) length; mounting hole 0.25" (6.3 mm) diameter |
| Weight | Approximately 5.43 oz (154 g) in air; approximately 1.9 oz (53.9 g) in fresh water |
*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%.
Click here for complete specifications on the Onset HOBO U20L-04Click on a category to view a selection of compatible accessories with the Onset HOBO U20L-04 Water Level Data Logger, 13'.
