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Assembly type heat resistance temperature sensor matching with display instrument, measurement the surface temperature about liquid, gas and solid medium of range -200~600 ℃ , widely used in petroleum, chemical, machinery, metallurgy, electric power, textile, food, atomic energy, sectors and fields of science and technology.
Assembly type heat resistance is usually composed of the temperature sensing element, fixing device and junction boxes and other major components.
Optional Models of Integrated Thermocouple/ResistancePt100 type, Pt1000 type, Cu50 type
Working Principle of Integrated Thermocouple/ResistanceThermal resistance measure temperature according to property of the material changes with the change of inherent resistance.Heating partial of thermal resistance use fine wire double around the framework which is made of insulation material,when temperature gradient is measured in the medium ,The measured temperature is the average whin temperature -sensing element of the dielectric layer .
Characteristics of Integrated Thermocouple/ResistanceThe national unified design , interface dimensions, good interchangeability;
The assembly structure, components decomposition is good, easy to repair;
Low cost of replacement of wearing parts;
Specifications complete, stable and reliable performance.
Insulation resistance
Code insulation resistance with platinum resistance should not be less than 100
|
Thermal inertia level |
Constant time (seconds) |
|
Ⅰ |
90－180 |
|
Ⅱ |
30－90 |
|
Ⅲ |
10－30 |
|
Ⅳ |
10 |
Code insulation resistance with copper resistance should not be less than 50
Cold insulation test voltage of resistance to 10~100V DC.
Self heat effect: platinum resistance allows the maximum current through the 5mA, the resulting temperature less than 0.3 ℃.
Thermal response time: the temperature step changes, the output variation of the thermal resistance and equivalent to the step change of the 50%, the time required, called response time of heat, represented by τ 0.5
Thermal resistance time constant
Nominal pressure thermal resistance: generally refers to the protection of pipe can bear at the operating temperature of the static pressure without rupture.
Heat resistance: minimum insertion depth shall not be less than 8-10 times its protective casing diameter.
Insulation resistance: when the ambient air temperature 15 - 35 ℃, relative humidity below 80%, the insulation resistance of 20000000000000 ohm (voltage 100V). With the insulation resistance splash-proof junction box shall be 2000000000000 euro (voltage 100V) thermal resistance temperature sensor at 0 ℃ resistance value (R0) and at 100 ℃ resistance value (R100) ratio: ratio = R100 / R
Index number Pt10, Pt100; R100 /R0 =1.3850 + 0.001
Index number Cu50, Cu100; R100 /R0 =1.3850 + 0.002
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