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HOBO U20L-04 Water Level Data logger (0-4m)

Hurry, only 10 left in stock
In stock
SKU
U20L-04
£422.24 £351.87

An accurate, low cost data logger designed to record water level fully compensated for barometric pressure in wells, streams, lakes etc.

 

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The HOBO U20L-01 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% measurement accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.

Key Features

  • Ideal for use in both fresh and saltwater environments, including wells, streams, lakes, wetlands, and tidal areas
  • For depths up to 4 metres (13 feet)
  • 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 in wells, streams, lakes etc
  • Can also be used in air to record barometric pressure
  • The non-vented design eliminates installation/maintenance issues and errors associated with vent tubes, desiccant maintenance, water ingress etc.

Measures Absolute Pressure, Barometric Pressure, Temperature and Water Level

IMPORTANT Requires HOBOware Pro software and either a U-DTW-1 Waterproof Shuttle or the Base-U-4 Optic USB Base Station for configuration and data offload. See Connectivity Options below.

More Information
Explanation

 

 

Pressure (Absolute) and Water Level Measurements U20L-04
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
Factory Calibrated Range 69 to 145 kPa (10 to 21 psia), 0° to 40°C (32° to 104°F)
Burst Pressure 310 kPa (45 psia) or 18 m (60 ft) depth
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
Raw Pressure Accuracy** ±0.3% FS, 0.43 kPa (0.063 psi) maximum error
Resolution <0.014 kPa (0.002 psi), 0.14 cm (0.005 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), see Plot A in manual
Resolution 0.10°C at 25°C (0.18°F at 77°F), see Plot A in manual
Response Time (90%) 10 minutes in water (typical)
Stability (Drift) 0.1°C (0.18°F) per year
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
Battery Life (Typical Use) 5 years with 1 minute or greater logging interval
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
Wetted Materials Polypropylene housing and lanyard; Viton and Buna-N O-rings; ceramic sensor in acetyl end cap; stainless steel screws suitable for saltwater
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.
Launch Modes Immediate start and delayed start
Offload Modes Offload while logging; stop and offload
Battery Indication Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.
Environmental Rating: IP68
CE Compliant The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

 

* Water Level Accuracy: With accurate reference water level measurement, known water density, accurate Barometric Compensation Assistant data, and a stable temperature environment.

** Raw Pressure Accuracy: Absolute pressure sensor accuracy includes all sensor drift, temperature, and hysteresis-induced errors.

*** Changes in Temperature: Allow 20 minutes in water to achieve full temperature compensation of the pressure sensor. Maximum error due to rapid thermal changes is approximately 0.5%.

 

Ideal For Professional
Brand Onset HOBO
Channel(s) 2
Onset Product Series U20L
Typical applications Environmental (Outdoor), Field Research, Water Quality
Measurements Barometric Pressure, Pressure, Temperature, Water Level

Standard delivery - £3.95 to £4.75

Available for purchases under £200. Your order should be with you within 3-5 working days.

 

Tracked delivery - £5.95

Our tracked delivery is either Royal Mail tracked, Parcelforce or DPD Local. Your order should be with you within 2-3 working days.

 

Next day delivery - £8.95

Place your order before 2:30pm Monday - Friday and receive your order the next day (excludes Saturdays, Sundays and Public holidays).

 

International delivery

International delivery is available for this product. The cost and delivery time depend on country.

 

Collection

You can collect from our showroom. Please call before visiting to ensure we have your order ready.

File NameLink
U20L-Manual.pdfDownload
Data Sheet PDF
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