Onset U20L-02 HOBO Water Level Data Logger (100 ft)

Pressure (Absolute) and Water Level Measurements:

  Operation Range: 0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100ft) 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: ±0.1% FS, 3.0 cm (0.1 ft) water (Typical error); ±0.2% FS, 6.0 cm (0.2 ft) water (Maximum error)

  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 at a stable temperature; 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)

  Resolution: 0.10°C at 25°C (0.18°F at 77°F)

  Response Time (90%): 10 minutes in water (typical)

Battery: 2/3 AA, 3.6 Volt lithium, factory-replaceable  

Memory (Non-volatile): 64K bytes memory (approx. 21,700 pressure and temperature 

samples) 

Weight Approximately: 154 g (5.43 oz) in air 

Approximately: 53.9 g (1.9 oz) in fresh water

Dimensions: 3.18 cm (1.25 inches) diameter, 15.24 cm (6.0 inches) length; mounting hole 6.3 mm (0.25 inches) diameter

Manual

Video