TT31 Thermocouple, screw-in type, 0 pages

Application

Thermocouples are suited for direct tempe-rature measurement of gaseous and liquid
media. The applications of the measuring inserts arenot limited to the specified thermocouples.
They are adapted to the given request withregard to temperature, length, bending pro-perty, vibration resistance and accuracy. In
addition to our stanard models we provide alot of special types for special applications. >

Important characteristics:

Thermocouples can be used in many fieldsof application thanks to the following charac-teristics: Cost-effective measuring principleՕ Easy signal processing Possibility of use even at large distaces from the measuring point (w. transmitter)Օ The thermocouples can be equipped with two measuring elements Easy exchange >

Construction and Operation:

A thermocouple consists of two electric con-ductors that are made from different materi-
als and are connected to each other at onend (measuring point). The thermoelectricpotential developing at the reference junction
depends on the materials of the thermo wiresand the difference between the temperatureat the measuring point and the referencejunction. The temperature at the referencejunction is to be kept at a constant level. If
this is not possible the thermo wires can beextended by a compensating line. Compen-sating cables transfer the thermoelectric po-
tential of the related thermocouples up to200հC without any loss. The construction ofthe screw-in thermocouples described in this
data sheet corresponds to the DIN 43770and DIN 43771, some are further develop-ments.Standard featuresProtective tube acc. to DIN 43772ՕConnection head acc. to DIN 43729
exchangeable measuring inset acc. to DIN43735Please see the end of this data sheet for ba-sic values and deviations of limit values.The protective tube is designed as screw-in
type for this type series. It protects the measuring insert andconsequently the thermocouple against pressure, flow and
possible damages. It remains installed and assures the con-tinuation of process during an exchangement of the measu-ring insert.The construction of the protective tube depends on the pres-sure and temperature of the medium on site. See the load dia-grams for the necessary specifications. The connection head
in most cases consists of light metal, acc. to DIN EN 50446,type B. Other connection heads are offered at the end of thisdata sheet.The thermocouples are also available with an integrated 2-wire transmitter.See the data sheets TE41 for details! >
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