The manufacturing processes of photovoltaic(PV) cells include texturing, diffusion, oxidation, photolithography, coating, sintering and some other processes. The corresponding equipment includes oxidation furnace, photolithography machine, diffusion furnace and other equipment.

It is common to use thermocouples measuring both the internal and external parts of the furnace to control the inner temperature of the diffusion furnace that could perform the oxidation process. Each specified temperature zone has a internal and external thermocouple to make sure the measure results are reliable.The R type external thermocouples are used to sense the outer surface of the furnace tube, each one commonly has only one pair of wires, to give an indirect measurement of the furnace.

 

 

The product has some traits of reliable temperature measurement, high accuracy, good stability, fast thermal response, anti-interference, high and low-temperature impact resistance, long service life, and so on. The technical parameters of the R type external thermocouple specialized for photovoltaic equipment are as follows:

Technical Parameters	External Thermocouple
Type	S,R
Wire or MIMS Diameter	φ0.35~0.5
Working Temp(℃)	0~1000
Accuracy(℃)	±1.0
Protective Tube Length(mm)	150~250
Protective Tube Diameter(mm)	φ4~6
Protective Tube Material	Corundum
Hot End Structure	Exposed
Number of Points	Single Point
Termination	Small Connector
Compensation Wire	SC-2×0.5FPF
Structure Characteristics	Disassemblable, somewhat difficult to assemble

 

 

 

 

 

 

 

 

 

 

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