Design And Function - WIKA 73 Manual De Instrucciones

2. Design and function

2. Design and function
2.1 Overview
Example: Model F73.100
Case

Dial

Pointer

Instrument mounting bracket

2.2 Description
The gas-actuated thermometer consists of a stem, capillary and
Bourdon tube in the case. These parts are combined to form a single
unit. The entire measuring system is filled with an inert gas under
pressure.
Any change in temperature causes a change in internal pressure in the
stem. The pressure deforms the measuring tube and the deflection is
transferred to the pointer via a movement.
WIKA operating instructions models 73, 74, 75





Capillary

Process connection

Stem

Example: Model R74.100


EN




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