Indumax CLS52

2

Endress+Hauser

Function and system design

Measuring principle

Inductive conductivity measurement

An oscillator (1) generates an alternating magnetic field in the primary coil (5), which induces a

current flow (4) in the medium. The strength of the current depends on the conductivity and thus on

the ion concentration in the medium. The current flow in the medium, in turn, generates a magnetic

field in the secondary coil (3). The resulting induced current is measured by the receiver (2) and used

to determine the conductivity.

1

2

3

4

5

A0024926

1

2

3

4

5

Oscillator

Receiver

Secondary coil

Current flow in the medium

Primary coil

Advantages of inductive conductivity measurement:

• No electrodes and therefore no polarization effects

• Accurate measurement in media with a high degree of

pollution and a tendency to form buildup

• Complete galvanic isolation of the measurement and the

medium

Important features of

Indumax CLS52

• Hygiene

The injection-molded PEEK sensor offers outstanding chemical, mechanical and thermal

resistance and is hygienically safe thanks to its seamless, crevice-free design.

• Temperature measurement and temperature compensation

For applications requiring fast temperature compensation (e.g. CIP return line, phase separation at

different temperatures), the Pt 100 temperature sensor is installed in a stainless steel thermal

conductivity socket which is sealed via a Chemraz O-ring. This guarantees very short temperature

response times (t90 < 5s).

• Process temperature

The use of special components and materials means that the sensor is suitable for exposure to

continuous temperatures of up to 125 °C. It can be operated at temperatures up to 140 °C for a

short time (max. 30 min.) for sterilization purposes.

• Process connections

The sensor is available with all the process connections commonly used in hygienic applications.