Process Control and Instrumentation
Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by

Reducing the volume of the capillary to a minimum
Reducing the volume of the receiving element to a minimum
All of these
Making the volume of thermometer bulb as large as conveniently possible

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Process Control and Instrumentation
A magnetic flowmeter is

Capable of measuring the flow rate of slurries and electrolytes
Based on the linear relationship between the fluid flow rate and the induced voltage
All of these
Based on the principle of Faraday's law

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