Conductivity Sensor 40190 pages

Conductivity Sensor 4019
A compact fully integrated sensor for
measuring the electrical conductivity of
seawater. Designed to be mounted on the
Recording Doppler Current Profiler RDCP
600. Two versions of this sensor are available,
4019B has enhanced accuracy compared
to 4019A, see specifications overleaf.
Advantages:
•tSmart Sensor for easy integration with RDCP
•tDirect readout of engineering data
•tInternal pressure never exceeds 1 bar
therefore electronics and sensors are
unaffected by sea depth
•tRugged and Robust with low maintenance
needs
•tOutput format Internal bus, RS-232.
•t3 depth ranges available max. 6000 meter

Conductivity is a key parameter for in-situ
determination of several fundamental physical
properties of seawater.
For seawater, the ability to conduct electrical
current is mostly dependent on temperature
and the amount of inorganic dissolved solid.
This means that, together with temperature and
depth information, a good estimate of the salinity
may be determined.
Salinity is defined as the concentration of dissolved
solids. Other important properties of seawater
are again dependent on the salinity. Among
these are the density and the speed of sound.
Measurements of Conductivity together with
Temperature and Depth improves the RDCP 600
virtual sensors, like Salinity and Speed of Sound.
These parameters improves the calculated current
speed and cell position. Together with the high
accuracy Pressure Sensor 3187 the Conductivity
Sensor 4019 provides for good CTD meassurement
on the RDCP 600.
The Conductivity Sensors 4019A and 4019B are
based on an inductive principle. This provides

for stable measurement without electrodes that
are easily fouled and may wear out in the field.
Utilization of miniature components has made it
possible to integrate all the required electronics.
A digital signal processor calculates salinity,
density and speed of sound. The salinity and
density are calculated according to the UNESCO
International Equation of State (IES 80).
The sensor can be set to output parameter in RS-232
mode or to the RDCP via the RDCP Internalbus.
In RS-232 mode the output parameters are
Conductivity in mS/cm, as well as Temperature,
Salinity, Density and Speed of sound. In RDCP
mode the output parameter is Conductivity in
mS/cm.
The sensors are available in 3 different depth
ranges; 0-300meter, 0-2000meter and 0-6000
meter.
The sensor can be mounted directly on the top end
plate of the Aanderaa RDCP 600 and connected
to the Sensor Board with a short patch cable
4054/4996.

D354 - JAN 2013