HOBO U20L-04 Water Level Data Logger
A low-cost, research-grade data logger for continuous monitoring of water level and temperature at depths of up to 13, 30, or 100 feet in a wide range of underwater environments. This logger features 0.1% measurement accuracy, a polypropylene housing for use in both freshwater and saltwater, and a non-vented design for convenient and hassle-free deployment.
Features
- Self-contained, non-vented design enables easy deployment
- Ideal for use in both freshwater and saltwater environments, including wells, streams, lakes, wetlands, and tidal areas
- Depths up to 13, 30, or 100 feet depending on model
- Durable ceramic pressure sensor withstands freezing
- HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density
Spesifikasi
Pressure (Absolute) and Water Level Measurements U20L-04
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
69 to 145 kPa (10 to 21 psia), 0° to 40°C (32° to 104°F)
310 kPa (45 psia) or 18 m (60 ft) depth
Typical error: ±0.1% FS, 0.4 cm (0.013 ft) water
Maximum error: ±0.2% FS, 0.8 cm (0.026 ft) water
±0.3% FS, 0.43 kPa (0.063 psi) maximum error
<0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) water
<1 second at a stable temperature; measurement accuracy also depends on temperature response time
Temperature Measurements (All Models)
- -20° to 50°C-4° to 122°F
- ±0.44°C from 0° to 50°C , see manual for plot±0.79°F from 32° to 122°F , see manual for plot
- 0.10°C at 25°C , see manual for plot0.18°F at 77°F , see manual for plot
10 minutes in water (typical)
- 0.1°C per year0.18°F per year
Logger
±1 minute per month 0° to 50°C (32° to 122°F)
2/3 AA, 3.6 Volt lithium, factory-replaceable
5 years with 1 minute or greater logging interval
64K bytes memory (approx. 21,700 pressure and temperature samples)
- Approximately 154 g (5.43 oz) in airApproximately 53.9 g (1.9 oz) in fresh water
3.18 cm (1.25 inches) diameter, 15.24 cm (6.0 inches) length; mounting hole 6.3 mm (0.25 inches) diameter
Polypropylene housing and lanyard; Viton and Buna-N O-rings; ceramic sensor in acetal end cap; stainless steel screws suitable for saltwater
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.
Immediate start and delayed start
Offload while logging; stop and offload
Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.
IP68
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