Abstract: Methods and systems are provides for measuring multi-dimensional sensing information for identification purposes. The identity of one or more substances is determined through analysis of multidimensional data that can include, among others, intrinsic information as well as extrinsic information. The method for identification of a substance comprises utilizing pattern recognition to form descriptors to identify characteristics of the substance. A system and computer program for performing analysis of the multidimensional data are also described.

Abstract: 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 an upper electrode formed of a noble metal porous body successively formed on the insulating substrate. The upper electrode is connected to the moisture sensitive layer and a portion of the insulating substrate. Preferably, the lower electrode is formed of a porous body. More preferably, the lower and upper electrodes are formed from Pt. Furthermore, preferably, a heater and a temperature measurement resistor are provided in the insulating substrate and are located directly below the moisture sensitive layer.

Abstract: A method and system for preventing vehicle misfuelling by utilizing an apparatus that receives a fuel nozzle into the filler neck, and activates a vacuum on the nozzle inserted therein. Using the pump's internal shut-off mechanism, this prevents the fuel pump from dispensing fuel until the sensing unit within the apparatus is able to identify the fuel proposed to be added to the tank. If the fuel is deemed acceptable, the vacuum is released, and the fuel is permitted to enter into the desired fuel tank.

Abstract: A method of operating an aluminum oxide moisture sensor to measure moisture in a sample gas, where the sensor comprises a pair of electrodes sandwiched about a dielectric, the method comprising: a) heating the sensor to a first temperature above the sample gas temperature and holding the sensor at said first temperature for a first predetermined period of time; b) cooling down the sensor to a second lower temperature over a second predetermined period of time; c) taking plural samples of sensor conductance over a third predetermined period of time at the lower temperature; and d) determining a rate of adsorption of the moisture and using the rate of adsorption as a measure of moisture in the sample gas.

Abstract: A state determination apparatus for a humidity sensor is provided for accurately determining the state of the humidity sensor, including the responsibility, from a result detected by the sensor itself. The state determining apparatus is configured to determine a humidity sensor arranged in an exhaust system of an internal combustion engine for detecting a humidity within an exhaust pipe. The apparatus comprises an ECU which determines whether or not the internal combustion engine is in a predetermined operating condition, calculates a change state parameter indicative of a change state of a value detected by the humidity sensor based on the detected value of the humidity sensor detected when the internal combustion engine is in the predetermined operating condition, and determines the state of the humidity sensor in accordance with the calculated change state parameter.

Abstract: A tape-drive condensation sensor includes a probe with first and second spaced-apart electrodes that define a passage for air flow within a pneumatic conduit. A voltage source is coupled between the electrodes and the voltage of the source and the spacing between the electrodes are adapted to pass a current when a drop of condensation forms between the electrodes. An alarm circuit is activated by the flow of current, the alarm being adapted to signal an event of discernible condensation.

Abstract: In a motor vehicle measured values from a solar sensor (8) and an interior temperature sensor (11) are supplied to a heating, ventilating and air-conditioning system, which sensors are arranged on a common housing. A moisture sensor (13) is additionally arranged on the housing (7) to supply measured values to the HVAC system.

Abstract: An absolute humidity sensor for a microwave oven is disclosed. The absolute humidity sensor includes a substrate having a first hole and a second hole in a predetermined region, a membrane formed on the substrate, a humidity sensing element formed on the membrane where the first hole is formed, for detecting humidity exposed to the air, having a variable resistance value depending on the detected humidity, and a temperature compensating element formed on the membrane where the second hole is formed, for compensating for the resistance value of the humidity sensing element.

Abstract: An apparatus and method for ensuring effective and efficient vehicle vapor recovery performance, storage tank system integrity relative to both vapor and liquid containment and for reducing the probability that inaccurate information causes companies to undertake unnecessary, expensive and wasteful loss investigations at gasoline dispensing facilities. A fuel storage and delivery system is transformed from an “open system” communicating directly with the environment to a “closed system” which ensures capture, containment and accurate accounting of both hydrocarbon vapors and liquid phase product.

Abstract: An exhaust emission analysis system is provided that includes an exhaust and dilution gas source respectively providing exhaust and dilution gases. A dilution unit includes exhaust and dilution gas flow devices, such as mass flow controllers, fluidly connected to the exhaust and dilution gas sources, respectively. The metering device in the mass flow controllers defines a gas flow rate of gas from its respective gas source. The gas flow devices are fluidly connected at a connection that mixes the gases to provide a diluted exhaust gas having an incorrect dilution ratio. A water measurement device such as an analyzer measures the water content of the exhaust gas, preferably subsequent to dilution. A water content dilution signal corresponding to the water content in the exhaust gas is sent from the water measurement device to a control device.

Abstract: A method of detecting moisture or wetness which enables determination as to whether or not precision instruments or industrial products have undergone improper conditions, is described, which comprises: (i) use of a composite material which contains at least one water-soluble decoloring agent and at least one methine dye whose color disappears upon reaction with the decoloring agent in a state that the decoloring agent and the dye are spatially isolated from each other, and (ii) detection of a history of contact with moisture or water by disappearance of color from the composite material.

Abstract: 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 be formed upon the substrate for use with the sensor circuit. The sensor circuit itself can comprise a capacitive type sensor circuit. A polymer can be coated over the sensor circuit and circuit components thereof to form an all polymer sensor for use in detecting chemical agents. Such a hygrosensitive polymer can comprise, for example, HMPTAC (2-hydroxy-3-methacryloxypropyl trimethylammonium chloride). The all polymer sensor formed thereof can also be utilized as a humidity sensor. The polymer can be laser carbonized by an argon ion laser to form the plurality of carbonized filaments.

Abstract: The present invention provides an apparatus that is used to measure relative humidity, such apparatus comprises a housing having a first end and a second end. There is a humidity sensor disposed at the first end of the housing for measuring the humidity in the air and a temperature sensor also disposed at the first end of the housing for measuring ambient temperature. The apparatus has an electronics portion in direct electrical communication with the humidity sensor and the temperature sensor for computing a relative humidity and a dewpoint temperature. The electronics portion is disposed within a center portion of the housing. There is, further, a battery that is in electrical communication with the electronics portion, the humidity sensor and the temperature sensor for providing power to the apparatus. Such battery is disposed in the center portion of the housing of the apparatus.

Abstract: Improved control of continuous processes that handle liquids. Data generated by this invention is used to control gas contents of liquids within optimum ranges, for instance in paper coating processes and in the manufacture of food products (ketchup), personal care products (shampoo), paints, and in any industry where information on entrained and/or dissolved gases, and related parameters such as true density of and gas solubility in process liquids, is employed to optimize processing. The amount of gas in a liquid is determined by subjecting a mixture of an incompressible liquid sample and a compressible gas to three or more different equilibrium pressure states, measuring the temperature and volume of the mixture at each of the pressure states, determining the changes in volume of the mixture between at least two different pairs of pressure states, and calculating the amount of gas in the liquid sample.

Abstract: Silica-based carrier impregnated with iron(III) or iron(II) salts functions as a humidity indicator giving a yellow/amber to nearly colourless colour change as the carrier humidifies.

Abstract: A sensor probe and method of use for determining the temperature, velocity, and/or liquid volumetric fraction of gas laden with droplets. In one variation, the probe includes a single heating element used in a well-characterized flow. The heating element is maintained above the Leidenfrost transition for the droplets, which prevents cooling effects from the droplets from impacting the temperature measurement. In another variation, the probe includes two or more heating elements arranged in similar flow environments. The property of interest is derived by relying on thermodynamic and heat transfer principles, which are not usable in conjunction with conventional devices.

Abstract: A method for determining the relative humidity of a volume V of air having a temperature of 100° C. or greater. The method comprises the steps of measuring the temperature TV of the volume of air and determining from that temperature the saturation vapor pressure psat(V) of the volume of air; collecting from the volume of air a sample volume S of air and cooling it to a temperature TS below 100° C., but above the dew point of the sample volume of air; determining from the temperature TS the saturation vapor pressure psat(S) of the cooled sample volume of air; determining the relative humidity RHS of the sample volume of air from TS and from the wet bulb temperature of the sample of air; and performing the calculation RHV=RHS×psat(S)/psat(V) to obtain a relative humidity RHV of the volume of air.

Abstract: A sensor module for an incubator or other patient support includes a temperature sensor for sensing the temperature of the air within the interior of the hood of support, a humidity sensor for determining the relative humidity of air drawn from the hood, a temperature sensor for determining the temperature of the air sensed by humidity sensor, and a correlator for adjusting the sensed relative humidity to provide an indication of the relative humidity within the hood.

Abstract: A method and system for preventing vehicle misfuelling by utilizing an apparatus that receives a fuel nozzle into the filler neck, and activates a vacuum on the nozzle inserted therein. Using the pump's internal shut-off mechanism, this prevents the fuel pump from dispensing fuel until the sensing unit within the apparatus is able to identify the fuel proposed to be added to the tank. If the fuel is deemed acceptable, the vacuum is released, and the fuel is permitted to enter into the desired fuel tank.

Abstract: Trace impurities such as organic compounds and carbon monoxide are reduced to sub-ppb levels in gases such as nitrogen, helium and argon, by gas purifying systems that contain an ultra-low emission (ULE) carbon material. Ultra-low emission (ULE) carbon materials is capable of removing impurities from a gas stream down to parts-per-billion (ppb) and sub-ppb levels without concurrently emitting other impurities such as moisture or carbon dioxide to the purified gas stream. The carbon material is superactivated by heating the carbon to temperatures between 300-800° C. in an ultra-dry, inert gas stream. The ultra-low emission (ULE) carbon material is handled and stored in an environment that minimizes contamination from moisture and other oxygenated species in order to maintain its ppb and sub-ppb impurity removal and low emission properties.

Abstract: A continuous flow moisture analyzer (20) includes a coaxial needle (34) having first and second needle portions (36, 38). The first needle portion (36) receives a carrier gas (24) and expels the carrier gas (24) through an output orifice (60). The second needle portion (38) has an input orifice (62) for receiving the carrier gas (24) expelled from the output orifice (60). A housing (40) encloses the output orifice (60) and the input orifice (62) when the moisture analyzer (20) is in a standby mode to obtain a baseline moisture content of the carrier gas (24) within the moisture analyzer (20). A bottle (48) retains a sample material (50). When the analyzer (20) is in an active mode, the coaxial needle (34) penetrates a septum (52) of the bottle (48) to position the output and input orifices (60, 62) in the bottle (48). The carrier gas (24), expelled from the output orifice (60), absorbs moisture from the sample material (50) in the bottle (48).

Abstract: A system for the retrieval and initial conditioning of sample gas for “on line” analyzers or filling of gas sample cylinders. The preferred embodiment of the present invention contemplates a system configured to obtain a representative gas phase sample from a process gas containing entrained liquid, or a process gas which generally is highly susceptible to partial condensation of some gas phase components. The preferred embodiment of the present invention teaches an assembly including a phase separation membrane and housing configured to facilitate the removal of entrained liquid from a sample gas stream. Accuracy of the sample is enhanced, and compositional changes are avoided by first extracting a sample from the process gas followed by removal of entrained liquid it may contain, with the entrained liquid removal being conducted at the prevailing process gas pressure and temperature.

Abstract: An asynchronous motor is used in the process for determining the proportion of a gas constituent, especially water vapor, contained in a gas mixture. The asynchronous motor drives a delivery device for circulating the gas mixture that is used for treating foodstuffs. The difference between the rotational speed, which occurs while the delivery device is driven, and the synchronous rotational speed, i.e. the slip, is used as a measure for the sought proportion of the gas constituent at respectively established pressure and temperature values of the gas mixture.

Abstract: The invention is a device for monitoring humidity, comprising a first layer, which is a visual indicator, a second layer covering and obscuring the first layer, with the second layer comprising a deliquescent material. The deliquescent material picks up moisture and dissolves itself in the moisture, becoming transparent and exposing the first layer. Also included is a viewing means, such as a sight glass, disposed on the opposite side of the second layer from the first layer. The components of the device are mounted or placed in an enclosure that allows entrance of moisture. The activation humidity level may be selected by choosing the appropriate deliquescent material. The device may be in the form of a component of a moisture-containing system and used to detect the moisture should it leave its containment. It may also be in the form of a stand-alone device, such as a capsule, used to monitor exposure to humidity.

Abstract: The invention is a device for monitoring humidity, comprising a first layer, which is a visual indicator, a second layer covering and obscuring the first layer, with the second layer comprising a deliquescent material. The deliquescent material picks up moisture and dissolves itself in the moisture, becoming transparent and exposing the first layer. Also included is a viewing means, such as a sight glass, disposed on the opposite side of the second layer from the first layer. The components of the device are mounted or placed in an enclosure that allows entrance of moisture. The activation humidity level may be selected by choosing the appropriate deliquescent material. The device may be in the form of a component of a moisture-containing system and used to detect the moisture should it leave its containment. It may also be in the form of a stand-alone device, such as a capsule, used to monitor exposure to humidity.

Abstract: In a humidity sensor device comprising a pair of opposed electrodes disposed on an insulating substrate to define a gap therebetween and a humidity sensitive thin film lying on the gap, the humidity sensitive thin film is a thin film comprising a polymer or copolymer obtained from a monomer of formula (1), and formation of the humidity sensitive thin film is optionally combined with treatment of the insulating substrate by physical means. A humidity sensor device for detecting and determining moisture in the surrounding atmosphere which has improved water resistance, solvent resistance, and gas resistance, and exhibits stable output performance in a wide humidity region without hysteresis is provided as well as a method for preparing the same.

Abstract: Systems and methods for monitoring a heat treating atmosphere derive from at least one sensor placed in situ in the atmosphere a process variable, which is indicative of the ratio of gaseous hydrogen H2(g) to water vapor H2O(g) in the atmosphere. The systems and methods use the process variable, e.g., to control the atmosphere, or to record, or display the process variable.

Abstract: Disclosed is a sensor arrangement which is especially suitable for detecting if the windscreen of a motor vehicle is steamed up. The sensor arrangement comprises a heat conducting layer disposed on a supporting surface. Said layer exhibits good heat conducting properties. A support plate is arranged on top of the heat conducting layer, comprising a recess and several electrical conductor tracks. A moisture-sensitive sensor element is arranged in the region of the recess of the support plate. Said sensor element is electroconductively connected to the conductor tracks on the support plate. The inventive arrangement ensures that the temperature difference between the sensor element and the supporting surface does not go beyond a given limit when measurement occurs.

Abstract: A humidity sensor includes a pair of interdigital electrodes disposed on an insulating substrate and defining a gap therebetween, an undercoat layer of silane compound lying on the gap-defining electrodes and substrate, and a humidity sensitive thin film lying thereon. The humidity sensitive thin film is formed of a crosslinked product of a conductive polymer having ethylenically unsaturated groups, and physically bound to the undercoat layer through an interpenetrating polymer network. The sensor is fully resistant to water so that it ensures stable operation over a long time even in a dew condensing atmosphere. The sensor is free of hysteresis and able to measure humidity over a very wide range.

Abstract: A continuous flow moisture analyzer (20) includes a coaxial needle (34) having first and second needle portions (36, 38). The first needle portion (36) receives a carrier gas (24) and expels the carrier gas (24) through an output orifice (60). The second needle portion (38) has an input orifice (62) for receiving the carrier gas (24) expelled from the output orifice (60). A housing (40) encloses the output orifice (60) and the input orifice (62) when the moisture analyzer (20) is in a standby mode to obtain a baseline moisture content of the carrier gas (24) within the moisture analyzer (20). A bottle (48) retains a sample material (50). When the analyzer (20) is in an active mode, the coaxial needle (34) penetrates a septum (52) of the bottle (48) to position the output and input orifices (60, 62) in the bottle (48). The carrier gas (24), expelled from the output orifice (60), absorbs moisture from the sample material (50) in the bottle (48).

Abstract: In a humidity sensor device comprising a pair of opposed electrodes disposed on an insulating substrate to define a gap therebetween and a humidity sensitive thin film lying on the gap, the humidity sensitive thin film is a thin film comprising a polymer or copolymer obtained from a monomer of formula (1), and formation of the humidity sensitive thin film is optionally combined with treatment of the insulating substrate by physical means. A humidity sensor device for detecting and determining moisture in the surrounding atmosphere which has improved water resistance, solvent resistance, and gas resistance, and exhibits stable output performance in a wide humidity region without hysteresis is provided as well as a method for preparing the same.

Abstract: An adsorbent deterioration determining apparatus can accurately determine a deterioration of an adsorbent in a relatively simple configuration. The adsorbent deterioration determining apparatus determines a deterioration of an adsorbent arranged in an exhaust system of an internal combustion engine for purifying exhaust gases. The adsorbent is capable of adsorbing hydrocarbons and moisture in exhaust gases. The adsorbent deterioration determining apparatus comprises a humidity sensor arranged at a location downstream of the adsorbent in the exhaust system for detecting the humidity of exhaust gases, and an ECU for determining a deterioration of the adsorbent in accordance with a detected output of the humidity sensor at the time a predetermined time has elapsed from a start of the internal combustion engine.

Abstract: A method and an apparatus are disclosed for the measurement of the aridity, temperature, flow rate, total pressure, still pressure, and kinetic pressure of steam at a downhole location within a well through which wet steam is flowing. The apparatus comprises a series of fiber optic sensors that are mounted on sections of a shell assembly. The apparatus is lowered into a well to different downhole locations, and measures the multiple parameters of steam at different locations and heights. The data can be stored on board for subsequent analysis at the surface when the apparatus is retrieved from the well. The apparatus is very reliable, accurate, and of long-life in harsh environments.

Abstract: An asynchronous motor is used in the process for determining the proportion of a gas constituent, especially water vapor, contained in a gas mixture. The asynchronous motor drives a delivery device for circulating the gas mixture that is used for treating foodstuffs. The difference between the rotational speed, which occurs while the delivery device is driven, and the synchronous rotational speed, i.e. the slip, is used as a measure for the sought proportion of the gas constituent at respectively established pressure and temperature values of the gas mixture.

Abstract: The subject of the present invention is a method and a device for filling a distribution line (20) with corrosive gas. The said method is a method for filling with gas, with passivation, a line (20) for distributing corrosive gas, which line is intended to distribute the said corrosive gas to a system (3) located immediately downstream of the said line (20); the said method comprising: prior conditioning of the said line (20); the actual filling of the said line (20) with the said corrosive gas known as an active gas. Characteristically, the said actual filling with gas comprises: at least one cycle of filling the said line (20) with active gas as far as immediately upstream of the system (3) and of removing the said active gas thus introduced into the said line (20); the said removal being performed without the said active gas passing through the said system (3); followed by the final filling of the said line (20) with gas so as to make the said gas available to the said system (3).

Abstract: Moisture management indexes are determined for a textile sandwiched between two plates. Electrical conductors arranged in concentric opposing pairs are used to measure changes in electrical resistance of the fabric. A quantity of water (or other chosen liquid) is poured down a guide pipe and changes of resistance measured against time. From this data, specific indexes are determined, in a repeatable fashion, and used for determining moisture management characteristics of the fabric.

Abstract: A CVD apparatus is able to efficiently perform purging treatment after maintenance by using for the purge gas a mixed gas of a high thermal conductivity and an inert gas. Purging treatment before semiconductor film formation is performed by repeating the pumping of a vacuum and the introduction of inert gas a plurality of times. In addition, in order to judge suitable maintenance times, the moisture concentration in reaction chamber is measured with a moisture meter connected to the reaction chamber when performing a corrosive gas treatment, and maintenance times are determined according to changes in the moisture concentration when corrosive gas treatment is performed repeatedly.

Abstract: A technology for measuring an air permeability which can avoid, by using pure water in place of oil as a sealing liquid, adverse effects by oil mist and can accurately measure an air permeability by identifying variations in vapor concentration to be caused by using water. A device for measuring an air permeability installed in a constant temperature/humidity room, wherein an air chamber (22) is formed inside an inner tube (2) with the inner tube fitted in an outer tube (1) storing a sealing liquid, a sample clamping unit (5) that clamps a test sample is provided between an air passage (3) extending from the air chamber through the bottom of the outer tube and an exhaust passage (42) facing the air passage, pure water (W) is used as the sealing liquid, and a temperature/humidity measuring unit (6) and an air supply port (7) opened/closed by a solenoid valve (71) are provided in the vicinity of the sample clamping unit in the air passage.

Abstract: A micromechanical component having a substrate and a diaphragm positioned on the substrate. Underneath the diaphragm a region made of porous material is provided, which mechanically supports the diaphragm and thermally insulates it.

Abstract: The invention relates to a method for measuring the degree of evaporation of water through the skin, in which method a measurement chamber (20) is placed on the surface of the skin. In a method in accordance with the invention the measurement chamber (20) is a chamber which is open only at one side, and when placed on the skin it will become a totally closed chamber. During the measurement the vapour pressure is determined only in one point of the chamber. The degree of evaporation is determined by vapour pressure gradient in relation to time. In apparatus in accordance with the invention the measurement chamber (20) is open only at one side, and when placed on the skin it will become a totally closed chamber. Furthermore, there is a humidity sensor (21) in the measurement chamber for measuring the vapour pressure in one point of the measurement chamber.

Abstract: A method and equipment for measuring vapor flux from a surface e.g. the rate of water loss from human skin which is useful in the evaluation of the efficiency of the skin/water barrier uses a closed cylinder which is placed with the open end against the skin and the closed end is cooled. By measuring the temperature and relative humidity within the cylinder the water vapor flux can be determined.

Abstract: Described is an integrated glass fog sensor unit utilized to provide the necessary data to predict glass fog formation. The unit includes a glass surface temperature sensor, an ambient air temperature sensor, and a relative humidity sensor. The unit is mounted on a thermal barrier tray which serves to thermally isolate the ambient air temperature sensor and the relative humidity sensor from the glass surface. A protective dome having a plurality of apertures covers the tray and sensors. A flex circuit, also acting as a thermal barrier, is utilized to complete the circuit between the sensors and the fog control unit.

Abstract: A vapor sensing device that is sufficiently small and lightweight to be handheld, and also modular so as to allow the device to be conveniently adapted for use in sensing the presence and concentration of a wide variety of specified vapors. The device provides these benefits using a sensor module that incorporates a sample chamber and a plurality of sensors located on a chip releasably carried within or adjacent to the sample chamber. Optionally, the sensor module can be configured to be releasably plugged into a receptacle formed in the device. Vapors are directed to pass through the sample chamber, whereupon the sensors provide a distinct combination of electrical signals in response to each. The sensors of the sensor module can take the form of chemically sensitive resistors having resistances that vary according to the identity and concentration of an adjacent vapor.

Abstract: A vapor sensing device that is sufficiently small and lightweight to be handheld, and also modular so as to allow the device to be conveniently adapted for use in sensing the presence and concentration of a wide variety of specified vapors. The device provides these benefits using a sensor module that incorporates a sample chamber and a plurality of sensors located on a chip releasably carried within or adjacent to the sample chamber. Optionally, the sensor module can be configured to be releasably plugged into a receptacle formed in the device. Vapors are directed to pass through the sample chamber, whereupon the sensors provide a distinct combination of electrical signals in response to each. The sensors of the sensor module can take the form of chemically sensitive resistors having resistances that vary according to the identity and concentration of an adjacent vapor.

Abstract: A system for estimating evapo-transpiration from a plant is provided. The system includes (a) a first detector for detecting environmental radiation at a vicinity of the plant; (b) a second detector for detecting air humidity at a vicinity of the plant; (c) a third detector for detecting air temperature at a vicinity of the plant; (d) a fourth detector for detecting boundary diffusion layer resistance at a vicinity of the plant; and (e) a processor communicating with the first, second third and fourth detectors for retrieving data from the first, second third and fourth detectors and for calculating, based on the data a value corresponding to the evapo-transpiration from the plant.

Abstract: A humidity determination system for a hardcopy device, such as an inkjet printing mechanism, determines ambient humidity so printing routines may be adjusted to provide fast, high quality output in all environments. The system includes a thermal device having a viewable surface with a temperature which changes in response to a control signal. An optical sensor observes the viewable surface to detect an optical change in the sensor, such as when the surface passes through the dew point. A controller determines humidity from an ambient temperature reading and the temperature of the viewable surface at which the optical change occurs. With this information, the controller may change operating parameters of the hardcopy device. A hard copy device having such a humidity determination system is also provided, along with methods of determining humidity and operating a hardcopy device.

Abstract: A moisture sensor includes a moisture-sensitive film between a pair of electrodes having conductive particles dispersed in a hygroscopic polymer. The hygroscopic polymer is a polymer comprising a polyether amine, an epoxy compound, and optionally a water-soluble nylon. Alternatively, the hygroscopic polymer is a polyether ester amide and optionally a water-soluble nylon. The sensor enables DC measurement, can detect a humidity in the range of RH 60% to 100%, and ensures high performance stability against repetitive operations.

Abstract: A desiccant pack 1 with a humidity sensor comprises a pack body 10 formed by sealing the three opened sides of a package film having gas permeability and heat sealability, and a desiccant is filled inside the pack body 10. Humidity sensor substances are applied in a band or strip-shape to the surface of the pack body 10, by which humidity sensors 21, 22 and 23 are applied directly to the pack.

Abstract: A vapor sensing device that is sufficiently small and lightweight to be handheld, and also modular so as to allow the device to be conveniently adapted for use in sensing the presence and concentration of a wide variety of specified vapors. The device provides these benefits using a sensor module that incorporates a sample chamber and a plurality of sensors located on a chip releasably carried within or adjacent to the sample chamber. Optionally, the sensor module can be configured to be releasably plugged into a receptacle formed in the device. Vapors are directed to pass through the sample chamber, whereupon the sensors provide a distinct combination of electrical signals in response to each. The sensors of the sensor module can take the form of chemically sensitive resistors having resistances that vary according to the identity and concentration of an adjacent vapor.

Abstract: Described is an apparatus for measuring a water transpiration amount, which comprises a barrel-type body having a humidity sensor inside of the body and opening portions on the top and bottom of the body, wherein a gas introductory path for feeding, from the outside of the apparatus, a gas having a predetermined water content to a surface to be measured is disposed at the side wall portion of the body and a freely openable or closable shutter is installed at the bottom opening portion of the body. The apparatus according to the present invention makes it possible to carry out accurate and prompt measurement of a water amount transpired locally from the skin surface, ocular surface or the like without being influenced by the external circumstances such as wind.