Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
(A) Radiation/infrared pyrometer
(B) Filled system thermometer
(C) Mercury in glass thermometer
(D) Thermo electric pyrometer
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
(A) Radiation/infrared pyrometer
(B) Filled system thermometer
(C) Mercury in glass thermometer
(D) Thermo electric pyrometer
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