WIKA F73.100 - Design and Function

EN
12099431.07 11/2018 EN/DE/FR/ES
WIKA operating instructions models 73, 74, 75
5
2. Design and function
2.1 Overview

Case

Capillary

Dial

Process connection

Pointer

Stem

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 lled 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 deection is
transferred to the pointer via a movement.










Example: Model F73.100 Example: Model R74.100

2. Design and function