SEAGUARD® WLR Water Level Recorder0 pages

SEAGUARD® WLR
Water Level Recorder

The new AADI SEAGUARD® WLR is a robust instrument
based on the SEAGUARD® Platform. It is a self contained
instrument for measuring tide and temperature. The
instrument can be used as a platform for additional
measurements (e.g. CTD, current, dissolved oxygen and
turbidity).
Features of the SEAGUARD® WLR:
•tHigh Resolution and low drift
•tLow maintenance needs
•tSelectable interval from 2 seconds to 2 hours
•tSEAGUARD® Studio visualization software
•tSmart sensor topology based on a reliable CANbus
interface (AiCaP)
•tOutput parameters: Pressure, Temperature, Tide
pressure, Tide level. The WLR also provides raw data
of the Pressure and Temperature measurements.
•tReal-Time XML Output on RS-422(optional)
•tFor use in sea and fresh water
•tWindows CE based datalogger with TFT colour
touch panel for configuration
•t3 Pressure ranges: t
0 - 400 kPa / ~30m depth
ttt
0 - 700 kPa / ~60m depth
ttt
0 - 3100 kPa / ~300m depth

SEAGUARD® Water Level Recorder measures hydrostatic
pressure based on a silicon pressure sensor 4647. The
pressure measurements are sampled and temperature
compensated by an advanced Digital Signal Processor.
The SEAGUARD® WLR application areas are in fixed
installations, either deployed in a seabed installation in
shallow waters, or mounted onto a fixed structure in the
upper water column. Typical applications for the sensor
are measurements of tide in Ports and Harbors, Marine
operations, Hydrography, Weather forecast, and Climate
studies.
The tide measurement is an average of the hydrostatic
pressure measured over a time period of 10 seconds to 8
minutes (Integration time configurable by the user). The
update interval is between 2 seconds and 2 hours.
The SEAGUARD® WLR output parameters are Tide pressure,
Tide level, Pressure and Temperature. Tide levels are
preliminary, internally calculated estimates, based on
fixed, user selectable values of atmospheric pressure and
water salinity. Compensation for actual atmospheric
pressure and salinity can be postprosessed if such data is
available. Tide pressure is an average of hydrostatic pressure
over the integration time.

AADI is a trademark of Xylem Inc. or one of its subsidiaries.

Since all calibration and temperature compensation
data are stored inside the sensor, the parameters are by
default presented directly in engineering units without
any external calculation. The WLR also provides raw data
of the pressure and the temperature measurements.
The output parameters from the SEAGUARD® WLR are
easily presented in SEAGUARD Studio.
The SEAGUARD® WLR and the AADI smart sensors are
interfaced by means of a reliable CANbus protocol (AiCaP)
using XML for plug and play capabilities. The smart
sensors can be mounted directly on the top end-plate
or connected via cable to an AADI SEAGUARD® and are
automatically detected and recognized.
The SEAGUARD® WLR can be used with AADI Real-Time
Collector for Real-Time data.
The SEAGUARD® WLR has 2 battery compartments for
long deployment time.
The SEAGUARD® WLR can be equipped with a Conductivity
sensor for calculation of Salinity, Density and Sound of
speed.

D387 - Feb 2012