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Pressure Sensor:
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: ±0.05% FS, 1.5 cm (0.05 ft) water; Maximum error: ±0.1% FS, 3 cm (0.1 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
Thermal response time (90%): Approximately 10 minutes in water to achieve full temperature compensation of the pressure sensor
Temperature Sensor:
Operation range: -20° to 50°C (-4° to 122°F)
Accuracy: 0.37°C at 20°C (0.67°F at 68°F)
Resolution: 0.1°C at 20°C (0.18°F at 68°F) (10-bit)
Response time (90%): 3.5 minutes in water (typical)
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
Memory (non-volatile): 64K bytes memory (approx. 21,700 pressure and temperature samples)
Dimensions: 2.46 cm (0.97 inches) diameter, 15 cm (5.9 inches) length; mounting hole 6.3 mm (0.25 inches) diameter
Weight: Approximately 210 g (7.4 oz)
Delivery scope: HOBO U20-001-02 Water Level Data Logger (100-foot depth)
