The temperature transmitter is generallycomposed of temperature element, transitionlead, insulating tube, protective tube, junctionbox, fixing device, etc., dividing number Pt100,Cu50 thermistor, and K\N\E\J\T thermocouple.
The thermal resistance is used to measurethe temperature by the characteristics of thematerial when the temperature changes.Whenthe resistance changes, the instrument displaysthe temperaturecorresponding to theresistance value.
The thermocouple's electrode consists oftwo different conductor materials.When thereis a temperature difference between themeasuring end and the reference end,thermoelectric potential will be generated, andthe working meter will show the correspondingtemperature value of thermoelectric potential.
Temperature transmitter is usually used inconjunction withdisplayinstruments,recording instruments, electronic regulators,and computer control systems.
Table 1
| Hot resistance | thermocouple |
| Usually used in conjunction with display instruments, recording instruments, electronic calculations, etc.Direct measurement in the process of various production -200℃～500℃ within the scope of liquid, steam and gas medium, as well as solid surface temperature. | Usually used in conjunction with display instruments, recording instruments, electronic calculations, etc.Directly measuring the range of 0℃～1300℃ in the process of producing all kinds of liquid, steam and gas medium, as well as in solid surface temperature. |
Table 2
| Hot resistance | thermocouple |
Pressure spring type temperature sensor, goodvibration resistance; No need to compensate the wire, savingmoney; High precision of temperature measurement; High mechanical strength, good voltage resistance; Imported thin film resistance components,reliable and stable performance; | Simple assembly and convenient replacement; No need to compensate the wire, savingmoney; Large measurement range;High mechanical strength, good voltageresistance; |
Table 3
| Hot resistance | thermocouple |
EC751 JB/T18622-1997 JB/T8623-1997 | IEC584I EC1515 GB/T16839-1997 JB/T5582-91 |
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