Introduction; Measuring Principle - ProMinent DULCOTEST ICT 5 Montage- Und Betriebsanleitung

Introduction

1 Introduction
These operating instructions provide informa‐
tion on the technical data and functions of the
DULCOTEST sensor for inductive conduc‐
®
tivity, ICT 5 and ICT-IMA.
Sensor type ICT 5 is designed for continuous
flow operation.
Sensor type ICT 5-IMA is integrated in an
immersion tube for immersion in a storage tank
and in an open channel.
The sensor records the electrolytic conductivity
of an aqueous process liquid online. Both types
of sensor work on the basis of an inductive
measuring principle. The sensor is almost
maintenance-free due to the inductive meas‐
uring process. Solid deposits and fatty or oily
films on the surface of the sensor have no
impact on its measuring precision. The sensor
is particularly suitable for measuring high con‐
ductivities of up to 2000 mS/cm. A stand-alone
temperature sensor (Pt1000) with a short
response time records the process tempera‐
ture. The temperature sensor is enclosed within
a protective stainless steel sleeve. Tempera‐
ture correction of the conductivity measurement
in the connected controller is provided for by
the temperature sensor (Pt1000).
Typical applications
The sensor is predominantly designed for appli‐
cations in water treatment and for water moni‐
toring, e.g.:
Contaminated waste water and process
n
water
Air conditioning plants and chillers
n
Blowdown control in cooling towers,
n
Flushing baths,
n
Vehicle washing systems,
n
Salt water desalination (feed),
n
Swimming pool water control.
n
8
You can also use both types of sensor in conta‐
minated water or in aggressive media, which is
chemically inert to PVC/EPDM and/or PP/
EPDM (depending on the design of the sensor).
1.1

Measuring principle

The electrolytic conductivity is measured with
an inductive sensor. The sensor contains a
transmission and receiver coil. Sine alternating
voltage feeds the transmission coil. A sample
flow is induced into the receiver coil depending
on the conductivity of the liquid to be meas‐
ured. The sample flow is proportional to the
conductivity of the medium.