Water level recorder (30m) U20-001-02

THE'data recorder de water level HOBO U20-001-02 is a device of precise measurement designed to reliably and sustainably monitor the level and temperature water to a depth of 30 metres, adapted to various aquatic environments, whether it's about well, of streams, of lakes or freshwater wetlands for version in stainless steel, as well as wetlands of salt water/salter and tidal zones for its version in titanium.
It is distinguished by its design without the need for ventilation tubes or bulky dehydratants for maintenance, making it an ideal choice for a ongoing monitoring.
In addition, it is compatible with the software HOBOware Pro for one precise conversion data, offers several depth ranges to adapt to various applications, incorporates a protection against lightning, a design without ventilation tube for a reliable deployment, and is delivered with a calibration certificate traceable NIST in 3 points to ensure the accuracy of the measurements.

LOCATION OF CAPTOR U20

Technical specifications:

- Lightning protection: no long signal cables and electronic components are protected in a metal housing
- Software HOBOware Pro allows easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature and water density.
- Multiple rate sampling allows faster sampling at critical times, such as when pumping starts or stops.
- Available in four deep beaches
- Ideal for use in wells, streams, lakes, wetlands and tidal areas
- Aeration tube-free design for easy and reliable deployment
- Available in stainless steel and titanium versions
- Durable ceramic pressure sensor
- NIST traceable calibration certificate in 3 points included

Features of the pressure and water level sensor:

- Operating range: 0 to 400 kPa (0 to 58 psia), approximately 0 to 30.6 m (0 to 100 ft) water depth at sea level, or 0 to 33.6 m (0 to 111 ft) water at 3,000 m (10 000 ft) altitude
- Factory calibrated range: 69 to 400 kPa (10 to 58 psia), 0° to 40°C (32° to 104°F)
- Breaking pressure: 500 kPa (72.5 psia) or 40.8 m (134 ft) deep
- 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
- Gross pressure accuracy**: ±0.3% FS, maximum error of 1.20 kPa (0.17 psi)
- Resolution: - Pressure response time (90%)*** :

* Water level accuracy: with precise measurement of the reference water level, known water density, accurate barometric compensation assistant data and stable temperature environment.
** Gross pressure accuracy: absolute accuracy of the pressure sensor includes all errors induced by sensor drift, temperature and hysteresis.
*** Temperature changes: Wait 10 minutes in the water to get a complete compensation of the pressure sensor temperature. The maximum error due to rapid thermal changes is about 0.5%.

Temperature sensor features: 

- Operating 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 line A in the manual
- Resolution: 0.10°C to 25°C (0.18°F to 77°F), see track A in the manual
- Response time (90%): 5 minutes in water (typical)
- Stability (driving): 0.1°C (0.18°F) per year

Recorder Features:

- Real time clock: ± 1 minute per month 0° to 50°C (32° to 122°F)
- Battery: 2/3 AA, 3.6 V lithium, factory replaceable
- Battery autonomy (typical use): 5 years with a recording interval of at least 1 minute
- Memory (non-volatile): memory of 64 Kb (approximately 21,700 pressure and temperature samples)
- Weight: approximately 210 g (7.4 oz)
- Dimensions: 2.46 cm (0.97 inches) in diameter, 15 cm (5.9 inches) in length; 6.3 mm (0.25 inches) diameter mounting hole
- Wet materials: stainless steel 316, Viton® O-rings, acetyl cap, ceramic sensor
- Journalization interval:
Fixed or multiple rate logging intervals, with up to 8 intervals and user-defined logging times
Recording intervals from 1 second to 6 p.m.
Refer to the HOBOware software manual.
- Launch modes: immediate start and delayed start
- Method of unloading: unload during logging; stop and unload
- Battery indicator:
The battery voltage can be viewed on the status screen and possibly stored in a data file.
Low battery indication in the data file.
- Environmental assessment: IP68