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We stock a wide range of Thermal Oxidizer
Thermocouples.
Converting heat to electrical
energy, thermocouples are an inexpensive way to
measure a wide range of temperatures. Selecting
the optimum metal composition of a thermocouple
is based on application temperature, atmospheric
pressure, necessary length, accuracy, precision
and cost.
When replacing a thermocouple, it is absolutely
essential that the replacement type exactly
matches that of the measuring instrument.
Thermocouples differentiate in the way they
compute the voltage output curves.
It is of utter importance that the same
thermocouple, and extension wire, be used from
the sensing element to the measuring element.
Major errors can develop if this practice is
not followed:
WIRE SIZE OF THERMOCOUPLE
- The wire size selected in the
thermocouple sensor depends upon the
application. Generally, a larger gauge wire will
last longer life in high temperature conditions.
If sensitivity is the prime concern, then a
smaller gauge wire should be used.
LENGTH OF THERMOCOUPLE PROBE
- The effect of heat radiation from the
hot end of the thermocouple must be minimized;
therefore the thermocouple probe must have
sufficient length to counter. Unless there is
sufficient immersion, the readings will be low.
Thus, it is suggested that the thermocouple be
immersed a minimum distance, equivalent to four
times the outside diameter of a protection tube,
or well.
LOCATION OF THERMOCOUPLE -
Thermocouples must be positioned in a way that
they have a definite temperature relationship
with the work load. Usually, the thermocouple is
located between the work load and the heat
source; and should be located approximately 1/3
the distance from the work load to the heat
source.
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