Multiple-function fluid measuring and transmitting apparatus

A compact electronic multiple-function fluid measuring and transmitting apparatus comprising:

• a conduit for flowing a fluid under measurement;
• a pressure receiving portion provided in said conduit;
• a seal diaphragm provided to seal said pressure receiving portion at an inner wall portion of said conduit;
• a pressure receiving chamber storing a pressure/temperature communicating fluid;
• an electronic differential pressure detecting portion fixed to said conduit and having a differential pressure sensor in contact with said pressure/temperature communicating fluid at a location of said seal diaphragm for electronically detecting a differential pressure condition of said fluid under measurement;
• an electronic temperature sensor provided at a position in contact with said pressure/temperature communicating fluid at a location of said seal diaphragm for electronically detecting a temperature condition of said fluid under measurement;
• a sensor signal output means for outputting a sensor signal from said differential pressure sensor and said temperature sensor, and;
• a calculating means for receiving said sensor signal from said sensor signal output means, for performing compensation using a compensation data stored in a storing means and outputting a measurement signal for indicating a condition of said fluid under measurement.

A compact silicon-based multiple-function fluid measuring and transmitting apparatus disposed on part of a conduit containing a major mass of a transitory working fluid so as to directly contact with said major mass of said working fluid to provide at least differential pressure measurement and temperature measurement of said working fluid in direct contact with said major mass of said working fluid said apparatus comprising:

• a conduit for containing said major mass of working fluid;
• a pressure receiving portion provided in said conduit;
• a seal diaphragm provided to seal said pressure receiving portion at less than an entire circumferential portion of an inner wall of said conduit so as to provide a differential pressure and temperature communicating seal between said major mass of said working fluid and a pressure/temperature communicating fluid;
• a pressure receiving chamber holding said pressure/temperature communicating fluid;
• a differential pressure detecting portion fixed to said conduit and having a silicon-based differential pressure sensor in contact with said pressure/temperature communicating fluid for electronically detecting a differential pressure condition of said working fluid;
• a silicon-based temperature sensor provided at a position in contact with said pressure/temperature communicating fluid at a location of said seal diaphragm for electronically detecting a temperature condition of said working fluid;
• a sensor signal output means for outputting a sensor signal from said differential pressure sensor and said temperature sensor, and;
• a calculating means for receiving said sensor signal from said sensor signal output means, for performing compensation using a compensation data stored in a storing means and outputting a measurement signal for indicating a condition of said working fluid.

A multiple-function fluid measuring and transmitting apparatus comprising:

• a conduit for flowing a fluid under measurement;
• at least one pressure receiving space adjacent a wall portion of said conduit, and connected for fluid communication with said conduit using at least one tap hole;
• a seal diaphragm provided within said at least one pressure receiving space to define a pressure receiving chamber storing a pressure/temperature communicating fluid;
• a differential pressure detecting portion fixed to said conduit and having a differential pressure sensor in contact with said pressure/temperature communicating fluid at a location of said seal diaphragm for detecting a differential pressure condition of said fluid under measurement;
• a temperature sensor provided at a position in contact with said pressure/temperature communicating fluid at a location of said seal diaphragm for detecting a temperature condition of said fluid under measurement;
• a sensor signal output means for outputting a sensor signal from said differential pressure sensor and said temperature sensor, and;
• a calculating means for receiving said sensor signal from said sensor signal output means, for performing compensation using a compensation data stored in a storing means and outputting a measurement signal for indicating a condition of said fluid under measurement.