Specifications

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Siemens FI 01 · 2015 US Edition

Temperature Measurement

SITRANS TS500

Technical description

■

Configuration

Components: Process connections

Flanges

The different properties of the flanges are as follows:

• Standard series EN 1092, ASME 16.5,..

• Nominal pressure

• Nominal diameter

• Sealing face

This information is stamped into the flange, as well as the mate-

rial code and batch number for "3.1 Material".

Components: Thermowell

Thermowells fulfill two basic functions:

• They protect the measuring insert from aggressive media

• They make it possible to replace units during ongoing opera-

tions

This catalog is limited to the standard versions. Special versions

are available on request. The large number of available types

can be classified as follows:

• Barstock thermowells

Where process loads are too high, or where thermowells with

welded seams are not allowed, deep hole drilled barstock

thermowells are used. Form 4 thermowells (as per DIN 43772)

are very popular in this area. This thermowell type replaces

the D1-D5 types of the predecessor standard DIN 43763.

Components: Extension (neck tube)

The extension is the section from the lower edge of the connec-

tion head to the fixed point of the process connection or ther-

mowell. There is a variety of terms for this components, e.g. neck

tube. For this reason the term extension has been selected as a

standardized term for the different designs. Function is the de-

ciding factor:

• Thermal decoupling of connection head from process temper-

ature see image page 2/87

• Installation of connection head over existing insulation

• Simple standardization of measuring inserts: In general, the

length of the extension may be freely selected. However, when

using standardized insertion lengths, the option "Extension as

per DIN 43 772" is recommended. This ensures that measur-

ing inserts which are quickly available can be used. In case of

special lengths, it is possible to standardize the measuring in-

sert length through a clever combination with the respective

special extension length. This allows customers to optimize

their costs in purchasing and logistics.

• In the case of American-designed sensors, the extension also

takes the spring load of the measuring unit.

• Depending on the design, the extension can also be used to

achieve an alignment of the connection head.

• Barstock thermowells:

Extension and thermowell of two components which are

welded together. The process connection is attached to the

thermowell (= multi-piece protective armature).

Step down threaded well assemblies

Dimensions in inch

Sensor

Process

Connection

0.260

Bore

(1.75 std)

2 1/2"

1/4"

OD 2

NPT

OD 1