Description
Pressure (Absolute) and Water Level Measurements U20L-01 |
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| Operating Range |
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
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| Factory Calibrated Range |
69 to 207 kPa, 0° to 40°C(10 to 30 psia, 32° to 104°F)
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| Burst Pressure |
310 kPa or 18 m depth(45 psia or 60 ft depth)
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| Water Level Accuracy* |
Typical error: ±0.1% FS, 1.0 cm (0.03 ft) wate
Maximum error: ±0.2% FS, 2.0 cm (0.06 ft) water
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| Raw Pressure Accuracy** |
±0.3% FS, 0.62 kPa (0.09 psi) maximum error
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| Resolution |
<0.02 kPa water(0.007 ft water)
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| Pressure Response Time (90%)*** |
<1 second at a stable temperature; measurement accuracy also depends on temperature response time
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Pressure (Absolute) and Water Level Measurements U20L-02 |
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| 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
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| Factory Calibrated Range |
69 to 400 kPa (10 to 58 psia), 0° to 40°C (32° to 104°F)
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| Burst Pressure |
500 kPa (72.5 psia) or 40.8 m (134 ft) depth
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| Water Level Accuracy* |
Typical error: ±0.1% FS, 3.0 cm (0.1 ft) water
Maximum error: ±0.2% FS, 6.0 cm (0.2 ft) water |
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Raw Pressure Accuracy**
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±0.3% FS, 1.20 kPa (0.17 psi) maximum error
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| Resolution |
<0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) water
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| Pressure Response Time (90%)*** |
<1 second at a stable temperature; measurement accuracy also depends on temperature response time
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Pressure (Absolute) and Water Level Measurements U20L-04 |
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| Operation Range |
0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) of water depth at sea level, or 0 to 7 m (0 to 23 ft) of water at 3,000 m (10,000 ft) of altitude
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| Factory Calibrated Range |
69 to 145 kPa (10 to 21 psia), 0° to 40°C (32° to 104°F)
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| Burst Pressure |
310 kPa (45 psia) or 18 m (60 ft) depth
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| Water Level Accuracy* |
Typical error: ±0.1% FS, 0.4 cm (0.013 ft) water
Maximum error: ±0.2% FS, 0.8 cm (0.026 ft) water |
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| Raw Pressure Accuracy** |
±0.3% FS, 0.43 kPa (0.063 psi) maximum error
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| Resolution |
<0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) water
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| Pressure Response Time (90%)*** |
<1 second at a stable temperature; measurement accuracy also depends on temperature response time
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Temperature Measurements (All Models) |
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| Operation Range |
-20° to 50°C(-4° to 122°F)
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| Accuracy |
±0.44°C from 0° to 50°C , see manual for plot(±0.79°F from 32° to 122°F , see manual for plot)
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| Resolution |
0.10°C at 25°C , see manual for plot(0.18°F at 77°F , see manual for plot)
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| Response Time (90%) |
10 minutes in water (typical)
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| Stability (Drift) |
0.1°C per year(0.18°F per year)
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Logger |
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| Real-time Clock |
±1 minute per month 0° to 50°C (32° to 122°F)
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| Battery |
2/3 AA, 3.6 Volt lithium, factory-replaceable
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| Battery Life (Typical Use) |
5 years with 1 minute or greater logging interval
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| Memory (Non-volatile) |
64K bytes memory (approx. 21,700 pressure and temperature samples)
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| Weight |
Approximately 154 g (5.43 oz) in air
Approximately 53.9 g (1.9 oz) in fresh water
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| Wetted Materials |
Polypropylene housing and lanyard; Viton and Buna-N O-rings; ceramic sensor in acetal end cap; stainless steel screws suitable for saltwater
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| 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. Refer to the HOBOware User’s Guide for details.
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| Launch Modes |
Immediate start and delayed start
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| Offload Modes |
Offload while logging; stop and offload
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| Battery Indication |
Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.
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| Environmental Rating |
IP68
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