Differences in the Organizational Structure of Various Thermal Resistors in Shangzi Instrument

（1）Armored thermistorArmored thermistor is a solid body composed of temperature sensing elements (resistors), leads, insulation materials, and stainless steel sleeves. Its outer diameter is generally between 2 and 8mm, and the smallest can reach up to 8mm. Compared with ordinary thermistors, it has the following advantages:

① Small size, no air gap inside, low measurement lag in terms of thermal inertia;

② Good mechanical performance, vibration resistance, and impact resistance;

③ Can bend, easy to install

④ Long service life.

（2）End face thermistorThe end face thermistor temperature sensing element is made of specially processed resistance wire wound tightly against the end face of the thermometer. Compared with general axial resistance thermometers, it can more accurately and quickly reflect the actual temperature of the measured end face, and is suitable for measuring the end face temperature of bearing shells and other components

（3）Explosion proof thermistorExplosion proof thermistor uses a specially designed junction box to confine the explosion of explosive mixed gases inside its casing caused by sparks or arcs within the junction box, and will not cause an explosion on the production site. Explosion proof thermal resistors can be used for temperature measurement in areas with explosive hazards within Bla~B3c class zones.

Composition of Thermistor Temperature Measurement System

(4) A thermistor temperature measurement system generally consists of a thermistor, connecting wires, and a display instrument. The following two points must be noted:

① The scale marks of the thermistor and display instrument must be consistent

② In order to eliminate the influence of changes in the resistance of the connecting wires, a three wire connection method must be adopted.