Process Control and Instrumentation
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?

Vapor pressure thermometer
Radiation pyrometer
Platinum resistance thermometer
Mercury in glass thermometer

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Process Control and Instrumentation
Thermodynamic celcius scale of temperature measurement is

Both A&B Here
Defined on the basis of melting point of ice and evaporation temperature of water vapor
Having an interval of 100° between ice point to steam point
Having an interval of 100° between ice point to steam point

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