Patents
Patents for G01L 13 - Devices or apparatus for measuring differences of two or more fluid pressure values (2,634)
01/1983
01/04/1983US4366716 Pressure transducer
12/1982
12/28/1982US4365582 Differential pressure signal device
12/21/1982US4364276 Differential pressure measuring transducer assembly
12/15/1982EP0066583A1 Method for measuring the partial pressure of a gas and probe for implementing such method
12/08/1982EP0066520A1 Device for measuring a pressure difference in a pulse column and its use in measuring the interface level and the density of the liquid medium
12/01/1982EP0065845A1 High accuracy differential pressure capacitive transducer and method for making same
11/1982
11/25/1982WO1982004125A1 High accuracy differential pressure capacitive transducer and methods for making same
11/09/1982US4357859 Pressure sensor
10/1982
10/19/1982US4354389 Vapor pressure sensor and flow measuring devices
10/06/1982EP0061940A1 Differential pressure measuring system
10/05/1982CA1132810A1 Liquid filled pressure transducer
09/1982
09/08/1982EP0059488A1 Capacitive pressure sensor
09/07/1982US4347745 Pressure measuring apparatus
09/07/1982US4347744 Diaphragm type differential pressure gauge with overpressure relief protection
08/1982
08/24/1982US4345476 Differential pressure transducer with high compliance, constant stress cantilever beam
08/04/1982EP0057125A1 Transducer for a digital pressure measuring device
08/03/1982US4342231 Differential pressure transmitter
06/1982
06/24/1982WO1982002093A1 Method for measuring the partial pressure of a gas and probe for implementing such method
06/22/1982US4336567 Differential pressure transducer
06/08/1982US4333350 Differential pressure sensing device
06/01/1982US4332166 Temperature compensation apparatus for a liquid filled conduit
05/1982
05/18/1982US4329877 Adjustable overload mechanism for a differential pressure transmitter
05/18/1982US4329775 Pressure measuring apparatus using vibratable wire
04/1982
04/20/1982CA1122028A1 Pressure sensitive indicating device
04/15/1982WO1982001250A1 Capacitive pressure transducer with isolated sensing diaphragm
04/06/1982US4322979 Optical device for measuring slight differences of pressure by means of a change in light intensity
04/06/1982US4322978 Optical device for measuring slight pressure differences by means of light intensity changes
04/01/1982WO1982001041A1 Electropneumatic converter
03/1982
03/23/1982US4321578 Pressure transducer
01/1982
01/19/1982US4311053 Vibrating beam pressure sensor
01/12/1982US4309908 Liquid filled pressure transducer
12/1981
12/22/1981US4306460 Differential pressure transducer
11/1981
11/24/1981US4301685 Digital pressure-measuring device
11/17/1981CA1112470A1 Capacitive pressure sensor
10/1981
10/13/1981CA1110464A1 Differential pressure to electric current transducer employing a strain sensitive resistive pattern on a substrate having a high modulus of elasticity
09/1981
09/08/1981CA1108433A1 Digital pressure-measuring device
09/01/1981US4287501 Pressure sensor
09/01/1981CA1107982A1 Pressure responsive apparatus
08/1981
08/25/1981US4285244 Non-symmetrical overload protection device for differential pressure transmitter
07/1981
07/14/1981US4277981 Lead screw actuated fluid gauge
06/1981
06/23/1981CA1103478A1 Method and apparatus for overrange protection of the transducer in a differential pressure transmitter
05/1981
05/12/1981US4266430 Precision pressure-responsive fluid gauge
04/1981
04/28/1981US4264889 Pressure transducer
04/21/1981US4262540 Pressure measuring device
03/1981
03/25/1981EP0025566A2 Optical device for measuring small pressure differences by means of light intensity changes
03/25/1981EP0025565A2 Optical device for measuring pressure differences by means of light intensity changes
03/25/1981EP0025564A2 Optical device for measuring small pressure differences by means of light intensity changes
03/24/1981US4257274 For automobiles; silicon, borosilicate glass
03/24/1981CA1097990A1 Magnetic pressure indicator with thermal lockout
03/10/1981US4254731 Filter restriction indicator
02/1981
02/24/1981CA1096195A1 Digital differential pressure measurement apparatus
01/1981
01/20/1981US4245497 Monitoring and remote-indicator apparatus for vacuum-generating internal combustion engines
01/13/1981US4244226 Distance measuring apparatus and a differential pressure transmitter utilizing the same
09/1980
09/09/1980US4221134 Differential pressure transducer with strain gauge
09/09/1980US4221133 Vibratory-wire pressure sensor
09/02/1980CA1085018A1 Linear displacement transducer
08/1980
08/26/1980US4218925 Differential pressure transmitter with pressure sensor protection
08/19/1980CA1083893A1 Differential fluid pressure indicating device
07/1980
07/22/1980CA1081989A1 Capacitive pressure sensor
07/15/1980US4212209 Differential pressure to electric current transducer employing a strain sensitive resistive pattern on a substrate having a high modulus of elasticity
06/1980
06/26/1980WO1980001318A1 Pressure sensitive indicating device
06/10/1980CA1079087A1 Pressure-balanced telemetric pressure sensing system and method therefore
05/1980
05/20/1980US4203327 Piezoresistive silicon strain sensors and pressure transducers incorporating them
05/14/1980EP0010569A1 Magnetic pressure indicator with thermal lockout
05/13/1980CA1077294A1 Pressure transmitter with simplified pressure sensing head
05/06/1980CA1076832A1 Differential pressure transmitter with pressure sensor protection
04/1980
04/22/1980US4198867 Temperature compensating means for pressure measuring apparatus
04/22/1980CA1075979A1 Magnetic pressure indicator with sampling ports
04/08/1980US4196632 Dual capacitance type bonded pressure transducer
02/1980
02/19/1980US4189724 Electric restriction indicator with a contactless switch device for indicating a restriction in filter elements
02/06/1980EP0007596A1 Capacitive pressure sensor
01/1980
01/22/1980US4184376 Pressure sensitive indicating device
01/09/1980EP0006817A1 Numerically operating pressure sensor
12/1979
12/11/1979US4177680 Dual pressure sensor
11/1979
11/27/1979CA1067199A1 Transducer device for found waves with automatic compensation
11/06/1979US4173149 Differential pressure sensing devices
10/1979
10/30/1979US4172971 Magnetic pressure indicator with thermal lockout
10/30/1979US4172387 Pressure responsive apparatus
10/09/1979CA1063824A1 Differential pressure gauge
10/02/1979US4169389 Pressure measuring device
09/1979
09/11/1979CA1062093A1 Differential pressure indicating device
08/1979
08/28/1979US4165651 Pressure measuring apparatus using vibratable wire
08/07/1979US4163395 Pressure transmitter with simplified pressure sensing head
07/1979
07/24/1979US4161887 Media independent differential pressure transducer
07/10/1979CA1057971A1 Differential pressure cell with diaphragm tension and overpressure protection
07/10/1979CA1057969A1 Differential pressure sensor
06/1979
06/19/1979US4158311 Pressure sensing device
02/1979
02/13/1979US4139466 Differential fluid pressure indicating device
01/1979
01/23/1979US4135408 Differential pressure measuring transducer assembly
01/23/1979US4135407 Method and apparatus for overrange protection of the transducer in a differential pressure transmitter
01/16/1979US4134293 Pressure differential indicating apparatus for a hydraulic measuring bridge and its associated measuring piston
11/1978
11/21/1978US4126801 Moveable seat for crystal in an oscillating crystal transducer systems
10/1978
10/24/1978CA1040883A1 Open-loop differential-pressure transmitter
10/17/1978US4120206 Differential pressure sensor capsule with low acceleration sensitivity
10/03/1978CA1039780A1 Differential pressure switch
08/1978
08/29/1978CA1037283A1 Differential pressure indicators
08/08/1978US4104925 Pressure or pressure difference measuring apparatus
08/08/1978US4104924 Pressure difference measuring apparatus
07/1978
07/18/1978US4101747 Differential pressure operated switch
05/1978
05/30/1978US4091682 Digital differential pressure measurement apparatus
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