Smartec CLD134

2

Endress+Hauser

Function and system design

Measuring principle

Inductive conductivity measurement

An oscillator (1) generates an alternating magnetic field in the primary coil (2), which induces a

current flow (3) 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 (4). The resulting induced current is measured by the receiver (5) and used

to determine the conductivity.

1

5

4

3

2

A0004894

 1

Inductive conductivity measurement

1

Oscillator

2

Primary coil

3

Current flow in the medium

4

Secondary coil

5

Receiver

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 the

Smartec CLD134

• Hygiene

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

resistance and is hygienically safe thanks to its seamless, crevice-free design. As only virgin PEEK

is in contact with the medium, highest biological safety for the food, beverage and pharmaceutical

sectors is guaranteed. The sensor has been designed according to the latest guidelines of the

American Society of Mechanical Engineers - Bioprocessing Equipment (ASME BPE) and meets the

requirements of EC Regulation No. 1935/2004 of the European Parliament on materials and

articles intended to come into contact with food.

• Certified hygiene

The sensor has all the necessary listings and approvals for the hygiene sector, such as exclusive

use of FDA-listed materials for surfaces in contact with medium and certification according to 3-A

standards. With regard to in-place cleanability, the CLS54 sensor is certified by the European

Hygienic Engineering & Design Group (EHEDG). A certificate for biological reactivity testing

according to USP part <87> and <88> class VI including lot number tracking back to compounding

is also available as an option.

• Process connections

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

The most common connections can be supplied as standard. Other process connections can be

ordered as a custom-made product.