Water level recorder (9m) U20-001-01

THE'data recorder de water level HOBO U20-001-01 is a device designed for measure with accuracy the level and temperature water to a depth of 9 metres, adapted to variety of environments, including shallow wells streams lakes and freshwater wetlands (version in stainless steel), and the wetlands of salt water/brackish and tidal zones (titanium version).
It does not require ventilation tubes neither desiccants bulky maintenance, making it an ideal choice for a ongoing monitoring.
THE'recorder is compatible with the software HOBOware Pro for a precise conversion data and several depth ranges to adapt to various applications.
In addition, it is designed with a protection against lightning, a design without ventilation tube for a easy deployment and reliable, and it is delivered with a calibration certificate traceable NIST in 3 points to ensure accuracy of 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 207 kPa (0 to 30 psia), approximately 0 to 9 m (0 to 30 ft) water depth at sea level, or 0 to 12 m (0 to 40 ft) water at 3,000 m (10 000 ft) altitude
- Factory calibrated range: 69 to 207 kPa (10 to 30 psia), 0° to 40°C (32° to 104°F)
- Breaking pressure: 310 kPa (45 psia) or 18 m (60 ft) deep
- Water level accuracy*:
Typical error: ±0.05% FS, 0.5 cm (0.015 ft) water
Maximum error: ±0.1 % FS, 1.0 cm (0.03 ft) water
- Gross pressure accuracy**: ±0.3% FS, maximum error of 0.62 kPa (0.09 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