3. Configuration of
Thermocouple Assemblies
A thermocouple assembly consists
simply of a metal (outer) protection tube, the connection head, in which a ceramic connection base is mounted, and the thermocouple
that is connected to the base and fitted to
the protection tube. The outer protection tube diameter is usually 15 to 26mm
(standard diameters 15 and 22mm). Within the
protection tube, the thermocouple wires are insulated both from one another and
from the protection tube by means of ceramic
insulation tubes / a ceramic insulation rod. In addition,
Reckmann GmbH can, on request, also fit a gas-tight ceramic inner protection
tube. Figure 2 below shows the basic configuration
of a thermocouple assembly with the above-mentioned individual components. Depending on
operating conditions (e.g. at temperatures above approx. 1200°C), a
ceramic protection tube that is fitted to a metal stay
tube in the area of the connection head is used
instead of the metal (outer) protection tube.
Figure 2: Presentation and configuration of a thermocouple assembly:
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a. Connection head
b. Connection base with feeder
clamps
c. Metal protection tube (where appropriate, ceramic protection tube,
which is fitted to a metal stay tube in the area of the connection head)
d.
Ceramic inner protection tube
e. Ceramic insulation tube (a ceramic
insulation rod is used for noble metal thermocouples with a wire diameter of 0.5
/ 0.35mm)
f. Base thermocouple (wire diameter usually: 1.38 / 2.0 / 3.0mm)
g. Measuring point
(junction of
the two thermocouple wires) |
Go to Section 4 (Configuration of Sheathed Thermocouple Assemblies) |
