Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8079256 | Gas sensor and method for its production In a gas sensor with at least two electrodes and with a sensor body which is connected thereto and is composed of a gas-sensitive material, in addition to pores which may already be present, second cavities are provided in the sensor body. The second cavities may be... | 12/20/2011 |
| 8024970 | Passive humidity sensors and methods for temperature adjusted humidity sensing A humidity sensor having temperature sensing includes a substrate and a RLC (damped resonant) circuit formed in or on the substrate. The RLC circuit comprises a capacitor having a first and a second electrically conductive plate and a moisture sensitive dielectric i... | 09/27/2011 |
| 7971482 | Humidity sensor A capacitive humidity sensor includes: a humidity sensing element with a humidity sensitive film and electrodes; and a processing circuit. The film has a dielectric constant variable in accordance with moisture. The electrodes detect capacitance of the film and outp... | 07/05/2011 |
| 7644615 | Humidity sensor having humidity sensitive film and method for manufacturing the same A humidity sensor includes: a sensor chip including a capacitive humidity sensor element and a connection electrode, wherein the capacitive humidity sensor element includes a humidity sensitive film having relative permittivity changeable in accordance with humidity... | 01/12/2010 |
| 7594435 | Humidity sensor and semiconductor device including the same Provided is a humidity sensor whose electrode is set to have an island-like configuration and is enclosed by a humidity sensitive film. As a result, in the humidity sensor, adhesion property between the humidity sensitive films on the electrode is enhanced and thus ... | 09/29/2009 |
| 7451646 | Device and method for resonant high-speed microscopic impedance probe A resonant high-speed microscopic impedance probe useful for small scale impedance measurements and/or cell and particle counting. ... | 11/18/2008 |
| 7430904 | Capacitive humidity sensor and method of manufacturing the same A capacitive humidity sensor includes a semiconductor substrate, a protective layer and a humidity sensitive section including a pair of comb electrodes and a humidity sensitive layer having a dielectric constant, which changes in accordance with humidity. The comb ... | 10/07/2008 |
| 7404312 | Humidity-sensitive element for humidity sensor The invention provides a humidity-sensitive element using, as a humidity-sensitive film, a polyimide having a molecular structure capable of forming a network structure at a high density, exhibiting less drift after being left standing at a high temperature and a hi... | 07/29/2008 |
| 7400153 | Detector with capacitance sensor for detecting object being caught by door A detector for detecting an object that may be feared to or about to be caught by a closing door such as a slide door of a vehicle incorporates a capacitance sensor with a directionality characteristic in the direction of its detection surface. The detector has a ma... | 07/15/2008 |
| 7387024 | Capacitive type humidity sensor A capacitive type humidity sensor includes: a semiconductor substrate; a plurality of humidity devices having a capacitance variable in accordance with a humidity; a standard capacitance device having a standard capacitance, a capacitance change of which in accordan... | 06/17/2008 |
| 7340952 | Capacitive humidity sensor A capacitive humidity sensor includes a printed circuit board having an insulating substrate on which a circuit section is formed, a pair of electrodes formed on a surface of the insulating substrate to be opposite from each other with a space, and a humidity sensit... | 03/11/2008 |
| 7339168 | System and method for detecting water vapor within natural gas A system and method are disclosed for the detection of water vapor in a natural gas background. The system includes a light source operating in a wavelength range such as, 1.877-1.901 μm, 2.711-2.786 μm, or 920-960 nm, passes through the natural gas to be detected... | 03/04/2008 |
| 7332995 | Capacitive humidity sensor and method for manufacturing the same A capacitive humidity sensor includes: a humidity sensing element; a substrate; and an insulation film. The humidity sensing element includes a pair of comb-shape electrodes and a humidity sensitive film. The comb-shape electrodes are surrounded by a dam provided by... | 02/19/2008 |
| 7295126 | Perforated plane moisture sensor A moisture sensing apparatus, system and method. In general, a surface can be provided, and one or more conductor pairs located in a plane of the surface. Each conductor of the conductor pair(s) is insulated from one another. Water droplets forming on the conductor ... | 11/13/2007 |
| 7291825 | Capacitance type physical quantity sensor The capacitance type physical quantity sensor has a sensing part including a capacitor element generating a capacitance signal representing a magnitude of a physical quantity to be sensed, and a sensor circuit including a charge amplifier converting the capacitance ... | 11/06/2007 |
| 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 |
| 7222531 | Capacitive humidity sensor A capacitive humidity sensor for detecting a humidity change includes a first sensor element having a first capacitance, a second sensor element having a second capacitance and connected in series with the first sensor element, and a humidity sensitive layer having ... | 05/29/2007 |
| 7213462 | Humidity sensor and composite sensor having humidity detecting function A humidity sensor includes a resin molding body having a wall portion as a barrage, a chip having at least a humidity sensing function and fixed to a portion of the resin molding body inside the wall portion, and a terminal conductor insert-molded in the resin moldi... | 05/08/2007 |
| 7207212 | Device and method for weighing concrete material A measuring apparatus of submergence aggregate according to the present invention comprising a stock bin for storing fine aggregate, a fine aggregate feed hopper placed under the stock bin, a vibrating feeder placed under a discharge opening of the fine aggregate fe... | 04/24/2007 |
| 7181953 | Moisture detector assembly The moisture detector assembly includes a moisture detector having a probe extending into a housing bore to have fluid flow in contact with the probe and exiting through a housing bore orifice. A pressure regulator is mounted to the housing with its outlet opening t... | 02/27/2007 |
| 7181966 | Physical quantity sensor and method for manufacturing the same A capacitance type humidity sensor includes: a detection substrate including a detection portion on a first side of the detection substrate; and a circuit board including a circuit portion. The detection portion detects humidity on the basis of capacitance change of... | 02/27/2007 |
| 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 |
| 7165452 | Measuring method, measurement-signal output circuit, and measuring apparatus A measuring apparatus for detecting a change in frequency of a piezoelectric vibrating reed is realized with a simple circuit. The circuit of the measuring apparatus includes a phase lock loop circuit 20 which includes a phase comparator 22, a loop fil... | 01/23/2007 |
| 7114848 | Environment sensor An environment sensor (11) for measuring the temperature and humidity can be miniaturized and can respond at high speed. The environment sensor (11) includes a temperature sensing portion (111) having a temperature-sensitive material (1) ... | 10/03/2006 |
| 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 |
| 7051574 | Flow cell humidity sensor system A system for monitoring water concentration in gaseous sample is disclosed. It is readily applicable in the synthesis of biopolymer arrays/microarrays involving the use of water-sensitive reagents. A flow cell is provided in which a capacitance sensor is placed sepa... | 05/30/2006 |
| 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 |
| 7032448 | Capacitive humidity sensor A capacitive humidity sensor includes a detection portion and a reference portion. The detection portion includes detection electrodes and a moisture sensitive film. The reference portion includes reference electrodes and a moisture permeation film as a capacitance ... | 04/25/2006 |
| 7028531 | Sensor arrangement A sensor arrangement is suitable for detecting if a windscreen of a motor vehicle is fogging. The sensor arrangement includes a heat conducting layer disposed on a supporting surface, the layer exhibiting good heat conducting properties. A support plate is arranged ... | 04/18/2006 |
| 7013700 | Device and method for determining the moisture in gases A measuring device for measuring the moisture in gases comprises the following features: a moisture sensor and an evaluation unit connected thereto to provide a measured quantity representing a relative moisture in a gas, and a heating device which is thermally coup... | 03/21/2006 |
| 7012798 | Capacitor A capacitor having a tantalum or tantalum alloy electrode as one of the electrodes with an outgoing lead wire composed of a novel niobium alloy. According to the present invention, a capacitor having good heat resistance property can be inexpensively provided withou... | 03/14/2006 |
| 6981405 | Moisture-detection device A device for determining moisture has an LC-oscillating circuit as a transducer and an oscillator for exciting the oscillating circuit. Further, the device for determining moisture has a tuning device for frequency-wise tuning the oscillator and a measuring and eval... | 01/03/2006 |
| 6938482 | Humidity sensor element containing polyphenylsulfone A humidity sensor element for a humidity sensing device includes a rigid, p doped silicon substrate, a non-porous terminal on one side of the substrate, a porous terminal on a second side of the substrate, and a layer of polyphenylsulfone between the porous terminal... | 09/06/2005 |
| 6842018 | Planar capacitive transducer A transducer comprising at least one planar capacitor with a thin coverlayer of material selected to maximize electric field coupling between cooperating capacitor electrodes within a region external to a principal surface of the coverlayer. Preferred coverlayer mat... | 01/11/2005 |
| 6796166 | All polymer humidity sensor based on laser carbonized polyimide substrate A sensing device formed upon a substrate, including a method of forming the sensing device. A substrate can be provided, which is formed from a polymer. A sensor circuit can then be patterned and formed upon the substrate. One or more carbonized filaments can also b... | 09/28/2004 |
| 6756793 | Capacitance type moisture sensor and method of producing the same A capacitance type moisture sensor having the capability of accurately detecting amounts of water is provided. This sensor has a sensor housing having an electrically-insulating wall, a pair of electrodes disposed on the sensor housing, and a circuit unit. An outer ... | 06/29/2004 |
| 6742387 | Capacitive humidity sensor A capacitive humidity sensor includes a pair of opposed electrodes on a substrate. A humidity-sensitive film covers the electrodes. The electrodes are comb-shaped and interdigitated. Humidity is detected based on the capacitance between the pair of electrodes, which... | 06/01/2004 |
| 6647782 | Capacitive humidity sensor A humidity sensor has two detection electrodes located on a semiconductor substrate and a humidity sensitive film. The capacitance of the film changes in response to humidity. The sensor includes a reference capacitor and a feedback capacitor. An electrod... | 11/18/2003 |
| 6575621 | Dew point hygrometers and dew sensors The invention concerns dew point hygrometers based on condensation of dew on ends of optical fibers, or on surfaces of an optical prism. The invention also concerns a dew sensor for determining the natural dew condensation by optical means and a dew senso... | 06/10/2003 |
| 6564633 | Measurement method and system for a humidity or gas concentration sensor A method and system relating to an improvement in measuring accuracy of a gas concentration sensor, the method comprising the steps of measuring a parameter of the sensor, the parameter being a resistance or a capacitance, that is sensitive to the gas or ... | 05/20/2003 |
