HOBO™ Water Level Data Logger
SKU
U20-001-01
Special Order
$659.00
- Measure and Log Water Level (Pressure) and Temperature Readings
- -20°C to 50°C Temperature Measurement Range with ±0.44°C Accuracy
- Factory-Replaceable 2/3 AA 3.6 Volt Lithium Battery with 5 Year Life @ 1 Minute Sampling Rate
- No-Vent-Tube Design for Easy Reliable Deployment and Durable Ceramic Pressure Sensor
- Available in 0 to 13 ft, 0 to 30ft, 0 to 100ft and 0 to 250ft Water Depth Ranges and Stainless Steel or Titanium Housing
Requires HOBOware Pro Software (Version 3.2+) and an Optic USB Base Station (BASE-U-4) or Shuttle Data Transporter (U-DTW-1)
Special order - please note lead times for some items can take up to 8 weeks
User Manuals and Product Guides
Software Downloads
Product Videos
HOBO™ U20 Water Level Data Logger Specifications
| Data Channels | 2 Channels (Water Level and Temperature) |
| Water Level (Pressure) up to 13 ft Depth |
Range: 0 to 4 m (0 to 13 ft); 0 to 145 kPa (0 to 21 psia) Factory Calibrated Range**: 69 to 145 kPa (10 to 21 psia) Water Level Accuracy***: 0.3cm (0.01 ft) water; ±0.075% FS Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max Resolution: 0.14 cm (0.005 ft), < 0.14 kPA (0.002 psi) Burst Pressure: 310 kPa (45 psia) or 18m (60 ft) depth Response Time (Pressure): < 1 Second to 90% Response Time (Thermal): About 10 Minutes in Water to Achieve Full Temperature Compensation of the Pressure Sensor * Nominal Values at Sea Level ** @ 0°C to 40°C Temperature Range *** Typical Maximum Error Over the Full Temperature and Pressure Calibrated Range |
| Water Level (Pressure) up to 30 ft Depth |
Range*: 0 to 9 m (0 to 30 ft); 0 to 207 kPa (0 to 30 psia) Factory Calibrated Range**: 69 to 207 kPa (10 to 30 psia) Water Level Accuracy***: 0.5cm (0.015 ft) water; ±0.05% FS Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max Resolution: 0.21 cm (0.007 ft), < 0.02 kPA (0.003 psi) Burst Pressure: 310 kPa (45 psia) or 18m (60 ft) depth Response Time (Pressure): < 1 Second to 90% Response Time (Thermal): About 10 Minutes in Water to Achieve Full Temperature Compensation of the Pressure Sensor * Nominal Values at Sea Level ** @ 0°C to 40°C Temperature Range *** Typical Maximum Error Over the Full Temperature and Pressure Calibrated Range |
| Water Level (Pressure) up to 100ft Depth |
Range*: 0 to 30 m (0 to 100 ft); 0 to 400 kPa (0 to 58 psia) Factory Calibrated Range**: 69 to 400 kPa (10 to 58 psia) Water Level Accuracy***: 1.5cm (0.05 ft) water; ±0.05% FS Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max Resolution: 0.41 cm (0.013 ft), < 0.04 kPA (0.006 psi) Burst Pressure: 500 kPa (72.5 psia) or 40.8m (134 ft) depth Response Time (Pressure): < 1 Second to 90% Response Time (Thermal): About 10 Minutes in Water to Achieve Full Temperature Compensation of the Pressure Sensor * Nominal Values at Sea Level ** @ 0°C to 40°C Temperature Range *** Typical Maximum Error Over the Full Temperature and Pressure Calibrated Range |
| Water Level (Pressure) up to 250ft Depth |
Range*: 0 to 76 m (0 to 250 ft); 0 to 850 kPa (0 to 123 psia) Factory Calibrated Range**: 69 to 850 kPa (10 to 123.3 psia) Water Level Accuracy***: 3.8cm (0.125 ft) water; ±0.05% FS Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max Resolution: 0.87 cm (0.028 ft), < 0.085 kPA (0.012 psi) Burst Pressure: 1200 kPa (174 psia) or 112m (368 ft) depth Response Time (Pressure): < 1 Second to 90% Response Time (Thermal): About 10 Minutes in Water to Achieve Full Temperature Compensation of the Pressure Sensor * Nominal Values at Sea Level ** @ 0°C to 40°C Temperature Range *** Typical Maximum Error Over the Full Temperature and Pressure Calibrated Range |
| Water Level (Pressure) | Range: 0 to 4 m (0 to 13 ft); 0 to 145 kPa (0 to 21 psia) Factory Calibrated Range**: 69 to 145 kPa (10 to 21 psia) Water Level Accuracy***: 0.3cm (0.01 ft) water; ±0.075% FS Raw Pressure Accuracy: ±0.3% FS, 0.62 kPa (0.09 psi) Max Resolution: 0.14 cm (0.005 ft), < 0.14 kPA (0.002 psi) Burst Pressure: 310 kPa (45 psia) or 18m (60 ft) depth Response Time (Pressure): < 1 Second to 90% Response Time (Thermal): About 10 Minutes in Water to Achieve Full Temperature Compensation of the Pressure Sensor * Nominal Values at Sea Level ** @ 0°C to 40°C Temperature Range *** Typical Maximum Error Over the Full Temperature and Pressure Calibrated Range |
| Temperature | Range: -20°C to 50°C (-4°F to 122°F) Accuracy: ±0.37°C @ 20°C; ±0.5°C @ -5°C to 50°C Resolution: 0.1°C @ 20°C; 0.2°C @ -5°C to 50°C Response Time: 3.5 Minutes in Water to 90% Stability (Drift): ≤0.1°C/year (≤0.18°F/year) |
| Data Storage Capacity | Approximately 21,700 Pressure and Temperature Total Readings |
| ampling Rate | 1 Second to 18 Hours (User-Specified) Up to 8 Sampling Intervals User-Defined |
| Battery | 2/3 AA 3.6 Volt Lithium Battery - Factory Replaceable |
| Battery Life | 5 Years @ 1 Minute Sampling Rate (Dependant Upon Environment and Operating Range) |
| Battery Status Indication | Battery status displayed at launch or with status screen; Battery voltage can be logged |
| Environment | Waterproof; suitable for deployment in water or air, case materials resistant to fuels, solvents and lubricants. Titanium version recommended for saltwater deployments. |
| Operating Range | Temperature: -20°C to 50°C (4°F to 122°F) |
| Sample & Event Logging | Samples: Recorded Sensor Measurements Events: Logger Activity (ie: Bad Battery, Host Connected) |
| Wetted Materials | Vitron® O-Rings, Acetyle Cap and Ceramic Sensor 316 Stainless Steel or Titanium Housing |
| Software Compatibility | HOBOware PRO Version 3.2+ |
| OS Compatibility | Windows: Windows 11, 10 and 7 (32 and 64-Bit) Mac: OS X 10.9.x, 10.10.x and 10.11.x |
| Operation Indicator | Red LED in Communications Window |
| Start Modes | Immediate Start, Programmable Start Time/Date |
| Offload Modes | Offload while logging or stop and offload |
| Real-Time Clock | ±1 minute per month 0°C to 50°C (32°F to 122°F) |
| Standards Compliance | CE |
| Weight | 210 g (7.4 oz) |
| Dimensions | Logger: 24.6mm D x 150mm L (0.97" D x 5.9" L) Mounting Hole: 6.3mm (0.25") Diameter |
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