Platinum-rhodium thermocouple shortcomings: weakness is in the platinum rhodium thermocouple thermoelectric potential, because of the relatively small thermoelectric potential rate, so the sensitivity will be low a lot, if is used at high temperatures, will cause the loss of mechanical strength of serious situation, and is very sensitive to pollution, because is the use of precious metal materials, the materials of precious metals are more expensive, so a one-time investment is larger.
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