Abstract: An arm head includes an end portion to which a retainer is pivotally coupled and a surface covered by a coating. The end portion includes a coupling bore. The coupling bore includes an open end. First and second surfaces of the arm head form an annular recess around the open end that extends continuously from the open end. The radial outer surface extends outward in a radial direction from the annular recess. The first surface extends outward in the radial direction from the open end. The first surface is located inward in an axial direction of the coupling bore from the radial outer surface. The second surface extends from the first surface to the radial outer surface at an angle less than 180° with respect to the first surface.

Abstract: A sensor control apparatus (3) includes a full-range gas sensor composed of an oxygen concentration detection cell having a pair of electrodes (21, 22) and an oxygen pump cell having a pair of electrodes (19, 20). In an electric circuit section (30), an Ip current flowing between the electrodes (19, 20) is controlled such that an electromotive force Vs produced between the electrodes (21, 22) becomes equal to a reference voltage. The reference voltage is usually set to a first reference voltage. However, when the subject gas is air, the reference voltage is set to a second reference voltage. Humidity of the subject gas is detected on the basis of an error ?Ip between an Ip current detected when the reference voltage is set to the first reference voltage, and an Ip current detected when the reference voltage is set to the second reference voltage.

Abstract: An arm head includes an end portion to which a retainer is pivotally coupled and a surface covered by a coating. The end portion includes a coupling bore. The coupling bore includes an open end. First and second surfaces of the arm head form an annular recess around the open end that extends continuously from the open end. The radial outer surface extends outward in a radial direction from the annular recess. The first surface extends outward in the radial direction from the open end. The first surface is located inward in an axial direction of the coupling bore from the radial outer surface. The second surface extends from the first surface to the radial outer surface at an angle less than 180° with respect to the first surface.

Abstract: A sensor control apparatus (3) includes a full-range gas sensor composed of an oxygen concentration detection cell having a pair of electrodes (21, 22) and an oxygen pump cell having a pair of electrodes (19, 20). In an electric circuit section (30), an Ip current flowing between the electrodes (19, 20) is controlled such that an electromotive force Vs produced between the electrodes (21, 22) becomes equal to a reference voltage. The reference voltage is usually set to a first reference voltage. However, when the subject gas is air, the reference voltage is set to a second reference voltage. Humidity of the subject gas is detected on the basis of an error ?Ip between an Ip current detected when the reference voltage is set to the first reference voltage, and an Ip current detected when the reference voltage is set to the second reference voltage.

Abstract: A sensor comprising a sensor element, a metallic housing holding therewithin the sensor element, an inner tubular member fixed to an axially rearward end of the metallic housing, and an outer tubular member radially surrounding the inner tubular member and having a radially inward crimping section for contact with an outer surface of the inner tubular member, wherein an axially forward end of the crimping section is disposed axially apart from an axially forward end of the outer tubular member by a distance of 1.5 mm or less.

Abstract: There is provided a gas sensor for measuring the concentration of a specific gas component in a gas under measurement, including a gas diffusion rate limiting portion, a measurement chamber communicating with an atmosphere of the gas under measurement through the gas diffusion rate limiting portion, a sensor element having an ion-conductive layer with first and second surfaces, a first electrode disposed in contact with the first surface of the ion-conductive layer within the measurement chamber and a second electrode disposed in contact with the second surface of the ion-conductive layer and communicating exclusively with the atmosphere of the gas under measurement and a cylindrical support member installing therein the sensor element with the first and second surfaces of the ion-conductive layer directed toward front and base end sides of the support member, respectively.

Abstract: In an ammonia sensor (1), lead portions (7) and (9) are provided on an insulating substrate (5); a pair of comb-shaped electrodes (11) and (13) are connected to the lead portions (7) and (9), respectively; a sensitive layer (15) is provided on the comb-shaped electrodes (11) and (13); and a protective layer (17) is provided on the sensitive layer (15). Particularly, the sensitive layer (15) is formed of a gas-sensitive raw material predominantly containing ZrO2 and containing at least W in an amount of 2 to 40 wt. % as reduced to WO3.

Abstract: This invention provides a gas sensor including a proton-conductive polymer electrolyte layer and a method for measuring gas concentration, that are capable of measuring gas concentration at high accuracy notwithstanding the presence of water vapor.

Abstract: A sensor comprising a sensor element, a metallic housing holding therewithin the sensor element, an inner tubular member fixed to an axially rearward end of the metallic housing, and an outer tubular member radially surrounding the inner tubular member and having a radially inward crimping section for contact with an outer surface of the inner tubular member, wherein an axially forward end of the crimping section is disposed axially apart from an axially forward end of the outer tubular member by a distance of 1.5 mm or less.

Abstract: 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 phase such as silicate glass covering the crystalline phase. The glass phase contains an alkali metal oxide and/or alkaline earth metal oxide such as Li2O. The humidity sensitive porous layer (13) assumes a skeletal structure that is formed of crystalline phase oxide grains covered or coated with the glass phase. A heater (17) of the humidity sensor is controlled to heat the humidity-sensitive element section (3) at a temperature ranging from 500° C. to 800° C. so as to clean off the humidity-sensitive element section while an internal combustion engine is running and exhausting fouling substances.

Abstract: A hydrogen sensor includes a first electrode 3 and a second electrode 4 provided in contact with a proton conduction layer 2; a gas diffusion controlling portion 6 provided between a measurement gas atmosphere and the first electrode 3; and a support element (1a, 1b) for supporting the proton conduction layer 6, the first electrode 3, the second electrode 4, and the gas diffusion controlling portion 6. Hydrogen contained in a measurement gas introduced via the gas diffusion controlling portion 6 is dissociated, decomposed, or reacted by applying a voltage between the first electrode 3 and the second electrode 4 to thereby generate protons. Hydrogen concentration is obtained on the basis of a limiting current generated as a result of the generated protons being pumped out via the proton conduction layer 2 from the first electrode 3 side of the proton conduction layer to the second electrode 4 side of the proton conduction layer.

Abstract: A crimp contact includes a wire hold portion crimped onto and holding therein core wires of an electrical lead. The wire hold portion has a bottom wall and a pair of side walls bent in such a manner as to bring ends of the side walls into contact with each other to define a wire accommodation space and satisfies the following equations: {(W1?W2)/2}/W3?1.2 and H2/H1>0.5 where W1 is a maximum width of the wire hold portion; W2 is a maximum width of the wire accommodation space; W3 is a minimum thickness of the bottom wall; H1 is a maximum thickness of the wire hold portion; and H2 is a maximum distance from an outermost point of the side wall to a tip point of the side wall end along a thickness direction of the wire hold portion.

Abstract: A gas sensor (10) including a measurement chamber (28) into which a gas GS is flown and a detection element main body (40) facing the measurement chamber (28). The detection element main body (40) includes an element case 42, and a protective film (48) is adhered to a bottom surface thereof. An acoustic matching plate (50) and a piezoelectric element (51) of a substantially columnar shape and a tube body (52) provided in a position surrounding the acoustic matching plate 50 and the piezoelectric element 51 are housed in the element case (42). A filler is then introduced into the element case (42), whereby the acoustic matching plate (50), the piezoelectric element (51), and the tube body (52) are sealed by a filled layer (99).

Abstract: A detecting-element assembly (40) is configured such that a piezoelectric element (51) is housed in a casing body portion (43) of a casing (42), and is attached to a housing portion (22) of a flow path formation member (20) via a flange portion (41). Therefore, the path between the piezoelectric element (51) and the position of attachment of the detecting-element assembly (40) is elongated, whereby ultrasonic waves which leak into the interior of the detecting-element assembly (40) from the piezoelectric element (51) become unlikely to reflectively return from a joint. Thus, the influence of, for example, noise stemming from reflected waves is reduced, thereby enhancing the accuracy of detection. An average clearance of 1 millimeter or more is provided along the outer circumferential surface of the casing body portion (43) of the detecting-element assembly (40), whereby a problem of collected foreign matter is unlikely to occur.

Abstract: A fluid composition for a refrigerator, which comprises a chlorine-free fluorocarbon refrigerant and a refrigerator oil, said refrigerator oil consisting essentially of a tetraester of pentaerythritol of formula (1) with both 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid, said refrigerator oil exhibiting a pour point not higher than ?10° C.

Abstract: A gas sensor capable of reversibly and continuously measuring the concentration of a catalyst poison gas such as CO without specially needing recovering means such as a heater, and measuring the catalyst poison gas concentration without being affected by H2O concentration. The electrical circuit (15) of the gas sensor has an AC power supply (19) for applying an AC voltage between both electrodes (3), (5), an AC voltmeter (21) for measuring an AC voltage (AC effective voltage V) between the both electrodes (3), (5), and an AC ammeter (23) for measuring a current (AC effective current I) running between the both electrodes (3), (5). An impedance is determined from the AC effective voltage V and the AC effective current I generated when the AC voltage is applied to the both electrodes (3), (5).

Abstract: A refrigerator oil for use in compressors using therein a hydrogen-containing halogenocarbon as a refrigerant, consisting essentially of as a base oil at least one kind of an ester selected from the group consisting of a specific pentaerythritol ester such as an ester of pentaerythritol with a mono- or dicarboxylic acid, a specific polyol ester such as an ester of trimethylolethane with a mono- or dicarboxylic acid, a specific ester such as an ester of ethylene glycol and a dicarboxylic acid, and a specific polyol ester synthesized from a neopentyl type polyhydric alcohol, a monocarboxylic acid and a dicarboxylic acid; and further comprising at least one kind of an epoxy compound.

Abstract: A method for detecting the concentration of a specific component in gas discharged from an internal combustion engine, which includes detecting the concentration of the specific component under certain driving conditions to determine a zero point, which indicates a zero concentration of the specific component, of the detection output; calibrating the detection output of the gas sensor based on the determined zero point; and detecting the concentration of the specific component in exhaust gas based on the calibrated detection output.

Abstract: A blood collecting apparatus comprises a blood collecting needle 152; the blood collecting bag, a first tube whose one end communicates with the blood collecting bag and other end communicates with the blood collecting needle, the branch portion provided on a portion of the first tube, a second tube connected with the branch portion at one end thereof and having a blood take-out port (sampling port); and a flexible resin bag including a third tube communicating with the second tube. The flexible resin bag is capable of accommodating air inside a part of the first tube between the branch portion and the blood collecting needle and air inside the second tube when the blood collecting apparatus is used.

Abstract: A blood collecting apparatus comprises a blood collecting needle 152; the blood collecting bag, a first tube whose one end communicates with the blood collecting bag and other end communicates with the blood collecting needle, the branch portion provided on a portion of the first tube, a second tube connected with the branch portion at one end thereof and having a blood take-out port (sampling port); and a flexible resin bag including a third tube communicating with the second tube. The flexible resin bag is capable of accommodating air inside a part of the first tube between the branch portion and the blood collecting needle and air inside the second tube when the blood collecting apparatus is used.