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| Number | Title | Issue Date |
| 7389674 | Sensor An energy-autonomous sensor for detection of physical environmental parameters, having at least one sensor element, one storage element and one control circuit, with a timer circuit which is activated on reaching a predetermined electrical voltage on the storage ele... | 06/24/2008 |
| 7373819 | Stress sensitive humidity sensor based on a MEMS structure A humidity sensing apparatus and method include a substrate and a MEMS structure, wherein the MEMS structure is supported by the substrate. The MEMS structure comprises a humidity-sensitive material in association with a movable member such that when the humidity-se... | 05/20/2008 |
| 7280290 | Movable lens mechanism Disclosed is a lens mechanism made of a flexible support with a lens positioned on the support. A sensor is positioned below the lens so that it senses photons passing through the lens. At least one actuator is positioned around the lens such that a change in an ele... | 10/09/2007 |
| 7267002 | Capacitance type physical quantity detector A capacitance type physical quantity detector includes a sensor unit of which the capacitance varies depending upon a change in the physical quantity and a C-V converter unit which converts a change in the capacitance of said sensor unit into a voltage. The C-V conv... | 09/11/2007 |
| 7210333 | Humidity sensor and method of using the humidity sensor A humidity-sensitive porous layer (13) of a humidity-sensitive element section (3) of a humidity sensor (1) is formed of a crystalline phase oxide grains such as Al2O3—SnO2—TiO2 and of a glass phas... | 05/01/2007 |
| 7176700 | Moisture sensor device and self-diagnosing method therefor A moisture sensor device includes a sensor portion having a capacitance that is varied in accordance with surrounding humidity, a signal processor for processing a detection signal of the sensor portion and outputting the signal corresponding to the humidity, a heat... | 02/13/2007 |
| 7113069 | Aligned particle based sensor elements The present invention relates to a sensor array for detecting an analyte in a fluid, comprising first and second sensors formed by chemically sensitive resitors, wherein the first sensor comprises a region of aligned conductive material; or where each of the sensors... | 09/26/2006 |
| 7077004 | Method and device for measuring humidity A method and a device for measuring humidity may be suitable for determining the relative humidity in the high-humidity range. The device includes a sensor device, as well as a circuit connected to the same. The sensor device includes a capacitive humidity-sensor el... | 07/18/2006 |
| 7062968 | Temperature control apparatus for humidity sensor A temperature control apparatus for a humidity sensor is provided for preventing impurities from sticking on a sensor element, while protecting the sensor element from cracking due to the humidity sensor heated by a heater in the presence of condensation, to maintai... | 06/20/2006 |
| 7049829 | Moisture sensor with capacitive moisture measuring element and method of determining air humidity In a method of determining air humidity, a corrected moisture signal is calculated for a moisture signal (Hi) ascertained from electrical properties of a capacitive moisture measuring element. In a measuring phase (30) with rising relative air humidity (RH), ... | 05/23/2006 |
| 6883371 | Humidity sensor A humidity sensor including an insulating substrate, and a lower electrode formed from a noble metal, a moisture sensitive layer formed of a porous body predominantly containing alumina and containing predetermined amounts of TiO2 and SnO2 and ... | 04/26/2005 |
| 6823717 | Hybrid microcantilever sensors An apparatus and method for sensing chemical and/or biological analytes in a gaseous or liquid medium by monitoring the changes in impedance and thickness of a sensing element in the presence of the analyte is provided. Detecting means are provided to measure the ch... | 11/30/2004 |
| 6483324 | System for measuring humidity A device for measuring moisture is described. This device includes a sensor unit (1) having a moisture-sensitive sensor element (1.1) and a carrier element (2), upon which the sensor unit is mounted. The carrier element (2), as well as the sensor unit (1)... | 11/19/2002 |
| 5616851 | Ex-situ grain moisture analyzer for a combine A combine thresher has a multiple plate impedance cell grain moisture analyzer assembly with two of the plates being outside mounted ground plates to reduce EMI and RFI interference and provide more accurate moisture measurements. The assembly is ex-situ ... | 04/01/1997 |
| 5557042 | Impedance detector, in particular for radiosonde operation, as well as a process for the manufacture of a detector An impedance detector, in particular for radiosonde operation. The detector comprises a substrate (10 . . . 10E) made of an insulating material, onto which substrate the electrode and contact patterns (11, 11a, 13) necessary for the formation and connecti... | 09/17/1996 |
| 5553495 | Impedance detector, in particular for radiosonde operation and process for manufacture of an impedance detector An impedance detector, in particular for radiosonde operation. The detector comprises a substrate (10 . . . 10E) made of an insulating material, onto which substrate the electrode and contact patterns (11, 11a, 13) necessary for the formation and connecti... | 09/10/1996 |
| 5531097 | Absolute humidity meter An absolute humidity meter in which a humidity sensor changes an electrical impedance thereof-exponentially with respect to the relative humidity. A z-f converting circuit (impedance to frequency ) generates a pulse signal corresponding to the impedance. ... | 07/02/1996 |
| 5511418 | Method for measurement of relative humidity, in particular in radiosondes, and humidity detectors that make use of the method Method, in particular in radiosondes, for measurement of relative humidity by using a capacitive humidity detector (10) or a combination of detectors (101,102 ;10P), as well as humidity detectors. In the detector, between the capacit... | 04/30/1996 |
| 5511417 | Method and arrangement in measurement of humidity, in particular in radiosondes Method and detector arrangement for measurement of relative humidity in particular in radiosondes (100). In the humidity detector (14), an active material is used whose electric properties are a function of the amount of water absorbed by said material. T... | 04/30/1996 |
| 5485747 | Method of measurement of relative humidity, in particular in radiosondes, and humidity detectors that make use of the method Method, in particular in radiosondes, for measurement of relative humidity by using a capacitive humidity detector (10) or a combination of detectors (101, 102 ; 10P), as well as humidity detectors. In the detector, between the capac... | 01/23/1996 |
| 5388443 | Atmosphere sensor and method for manufacturing the sensor A sensor or detector for fluid parameters is in the form of a substrate having at least two cavities and at least two sensing or detecting portions bridging respective cavities. The sensing portions include a first sensing unit which is exposed to the amb... | 02/14/1995 |
| 5373738 | Humidity detector A humidity detector with a supporting substrate and a ladder polymer coating, which can be utilized in xerographic imaging and printing apparatuses.... | 12/20/1994 |
| 5343735 | Apparatus for accurately measuring the water content of gases An apparatus for accurately measuring the water content of a moist gas containing less than 50 parts per million (ppm) of water comprises an isothermal heat-sink (14), a radiator (20), a Peltier heater-cooler (24) thermally arranged between the isothermal... | 09/06/1994 |
| 5317274 | Humidity meter A humidity meter includes a humidity-frequency converter (2) which is essentially a pulse oscillator, the oscillation frequency of which depends upon the impedance of a humidity sensor (1), a differentiation circuit (3) and a wave-form shaping circuit (4)... | 05/31/1994 |
| 5065625 | Humidity meter A humidity meter includes a humidity-frequency converter which is essentially a pulse oscillator, the frequency of which depends upon the impedance of a humidity sensor, a pulse width modulator for adjusting pulse width of an output pulse of the converter... | 11/19/1991 |
| 4953393 | Transducer A passive electrically operable monitoring means has an inherent resistance and a characteristic capacitance and inductance only, so that the monitoring means has a predetermined natural frequency of oscillation. Variations in a physical parameter being m... | 09/04/1990 |
| 4891574 | Hygrometer with plural measuring bones and redundancy system circuit A hygrometer of the electrical impedance type includes a sensing element (1) having a porous moisture adsorbing layer (3), the electrical properties of which vary with the quantity of water vapour adsorbed on it sandwich between a substrate (2) and a poro... | 01/02/1990 |
| 4876890 | Moisture sensing apparatus and method A moisture sensing element is disclosed which comprises an electrically continuous article comprising an inorganic crystalline composition selected from the group consisting of zeolite molecular sieves in which the molar ratio of silica to alumina is grea... | 10/31/1989 |
| 4860584 | Composite moisture sensing apparatus and method A moisture sensing element is disclosed which comprises an electrically continuous article comprising a multi-compositional, multi-phase composite composition comprising as phases thereof (i) an electrically conducting or semiconducting substrate, (ii) an... | 08/29/1989 |
| 4703886 | Heat/cool comfort controller An atmospheric thermostat having an auxiliary humidity input, for controlling heating and cooling so as to provide a controlled temperature modified by the humidity present thereby to provide a desirable comfort level to humans within the controlled envir... | 11/03/1987 |
| 4632879 | Moisture sensor A moisture sensor comprising a substrate, a bottom electrode formed on said substrate, a moisture sensitive film formed on said bottom electrode and a moisture permeable electrode formed on said moisture sensitive film, said moisture sensitive film being ... | 12/30/1986 |
| 4562725 | Moisture sensor and a process for the production thereof A novel moisture sensor which comprises a moisture sensitive film formed either between a pair of electrodes or on any of the electrode which are formed on a solid substrate for a moisture sensor, said moisture sensitive film is made of a plasma polymeriz... | 01/07/1986 |
| 4558595 | Capacitance monitoring bridge circuit for an enthalpy responsive device An enthalpy control circuit has a humidity responsive capacitive element in one leg of a bridge circuit and a temperature responsive resistance element in another leg. The circuit is powered by a pulsating DC voltage of 1 kilohertz frequency for providing... | 12/17/1985 |
| 4522060 | Dry/dew/frost sensor A dry/dew/frost sensor comprising a plurality of sensor units, each sensor unit comprising a ceramic substrate (1, 2) whose permittivity is lower than ice and a pair of electrodes (3, 4; 5, 6) being arranged on the ceramic substrate in contact therewith, ... | 06/11/1985 |
| 4520341 | Moisture responsive element with crosslinked organic membrane and protective layering A moisture responsive element comprises a moisture responsive organic membrane in contact with electrically conductive members, in which the organic membrane consists essentially of a crosslinked organic polymer having a hydrophilic group. The element has... | 05/28/1985 |
| 4373392 | Sensor control circuit A sensor control circuit for detecting water vapor, various gases, etc. The sensor control circuit includes a sensor element whose impedance varies according to the concentration of water vapor, gas or the like and further includes a heating element for h... | 02/15/1983 |
| 4373391 | Relative humidity sensitive material A relative humidity sensitive material comprises a mixture of at least one hygroscopic salt and an at least partially electrically conductive metal based powder. Each salt in the relative humidity sensitive material has a cationic constituent selected fro... | 02/15/1983 |
| 4337658 | Humidity sensor A humidity sensor having an extended impedance range extending up to 1012 ohms precludes leakage currents. The sensor is in the form of an insulating substrate having conductive film such as gold applied to a surface thereof. The perimeter of a... | 07/06/1982 |
| 4328478 | Humidity sensitive device A humidity sensitive device comprises a base body of a preferably porous semiconductive ceramic having a grain boundary. A high resistance layer is formed in the grain boundary of the semiconductive ceramic and exhibits a humidity sensitive characteristic... | 05/04/1982 |
| 4319485 | Temperature.multidot.humidity detecting apparatus A temperature.multidot.humidity detecting apparatus which can detect the temperature and humidity with a single element. The temperature.multidot.humidity detecting element of the present invention varies its impedance value with respect to variations in ... | 03/16/1982 |
