Method of measuring temperature and apparatus for effecting the method

A fluidic resistance type temperature measuring apparatus for measuring a temperature, comprising:

• a source of a working fluid;
• temperature-sensitive means for providing a pressure drop for said working fluid;
• said temperature-sensitive means including,
• an external cylinder closed at one of its ends;
• an internal cylinder disposed inside said external cylinder, and
• a capillary tube positioned at a forward end of said internal tube,
• said capillary tube and said external cylinder having a structural relationship such that said pressure drop is generated across said capillary tube;
• a supply tube for introducing said working fluid from said source into said external cylinder;
• a pressure control means, disposed in series with said supply tube, for controlling said working fluid's pressure;
• mass flow control means, disposed in series with said supply tube and said pressure control means, for controlling said working fluid's mass flow rate;
• differential pressure gauge means for detecting said pressure drop across said capillary tube and for providing an output signal corresponding to said pressure drop;
• and
• temperature operating means for determining the temperature in accordance with said output signal from said differential pressure gauge means.

A fluidic resistance type temperature measuring apparatus for measuring temperatures, comprising:

• a source of a working fluid;
• a plurality of temperature-sensitive means, connectively disposed in series with said source, for providing a plurality of pressure drops for said working fluid;
• each temperature-sensitive means including,
• an external cylinder closed at one of its ends;
• an internal cylinder disposed inside said external cylinder, and
• a capillary tube positioned at a forward end of said internal tube,
• said capillary tube and said external cylinder having a structural relationship such that said pressure drop is generated across said capillary tube;
• a supply tube connected to a first temperature-sensitive means to introduce said working fluid from said source into said first temperature-sensitive means;
• pressure control means, disposed in series with said supply tube, for controlling said working fluid's pressure;
• mass flow control means, disposed in series with said supply tube and said pressure control means, for controlling said working fluid's mass flow role;
• a plurality of differential pressure gauge means, for determining said pressure drop across said capillary tube and for providing an output signal corresponding to said pressure drop, each differential pressure gauge means operatively connected to an individual temperature-sensitive means;
• temperature determining means, operatively connected to said plurality of differential pressure gauge means, for determining the temperatures in accordance with said output signals from said differential pressure gauge means.