Abstract: A system for calibrating a device for measuring materials concentration in the blood is disclosed. The system may include at least two sets of calibrating elements, each set may include a plurality of calibrating elements. Each of the calibrating elements in the sets may include, a first layer simulating a specific human skin characteristics; and a second layer consisting a specific concentration of one or more materials in the blood. For all calibrating elements in a set the first layer may be the same first layer simulating the same human skin characteristics such that each set of calibrating elements simulate different skin characteristics. Each calibrating element in a set of calibrating elements may include a different second layer consisting a different concentration of the one or more materials. The system may further include a controller.

Abstract: A mobile gas monitor is presented. In accordance with some embodiments, a mobile gas monitor includes a gas sensor; a mobile device coupled to the gas sensor, the mobile device executing instructions to: read data from the gas sensor; provide calibration; and provide calibrated concentrations based on the data from the gas sensor.

Abstract: Diffuse reflectance spectroscopy apparatus for use in analysing a sample comprising a sample receiving location 2 for receiving a sample 3 for analysis; an illumination arrangement 4 for directing light towards a received sample; a detector 6 for detecting light reflected by a received sample; and collection optics 5 for directing light reflected by a received sample towards the detector. The illumination arrangement further comprises an interferometer 42 and a half beam block 45a, 45b which is disposed substantially at a focus in the optical path for blocking light which exits the interferometer, passes said focus, and is reflected from re-entering the interferometer.

Abstract: Embodiments relate generally to systems and methods for completing processes on a gas detector device using near-field communication between the gas detector device and an NFC tag. The NFC tag may communicate instructions or information to the gas detector device. The NFC tag may be located on or near a gas testing system, comprising gas deliver tube(s), gas tank(s), as well as other elements. In some embodiments, the gas detector device may comprise a single button to simplify interactions with the user.

Abstract: An inspection apparatus capable of performing responsivity inspection on a plurality of gas sensors at equivalent accuracies is provided. The inspection apparatus includes a plurality of inspected sensor disposing parts that are provided halfway through one gas flow path at equal intervals in an extending direction of the flow path and in each of which a gas sensor to be inspected is disposed, and a plurality of straightening plates provided upstream of each of the inspected sensor disposing parts on the gas flow path and separated at a constant distance from the inspected sensor disposing parts. The straightening plates each include a rectangular opening orthogonal to the gas flow path and open to the gas flow path. When the gas flow path extends in one direction in a horizontal plane, the opening has a longitudinal direction along a direction orthogonal to the one direction in the horizontal plane.

Abstract: Diffuse reflectance spectroscopy apparatus for use in analyzing a sample comprising a sample receiving location 2 for receiving a sample 3 for analysis; an illumination arrangement 4 for directing light towards a received sample; a detector 6 for detecting light reflected by a received sample; and collection optics 5 for directing light reflected by a received sample towards the detector. The illumination arrangement further comprises an interferometer 42 and a half beam block 45a, 45b which is disposed substantially at a focus in the optical path for blocking light which exits the interferometer, passes said focus, and is reflected from re-entering the interferometer.

Abstract: Embodiments are directed to controlling a flow of a mixture of gas at a plurality of concentrations, controlling a temperature of a chamber over a temperature range, reading, by a computing device comprising a processor, gas absorbance values from a first detector included in the chamber over the plurality of concentrations and over the temperature range, generating at least one of a look-up table and a mathematical formula for the first detector based on the gas absorbance values, and causing the at least one of the look-up table and the mathematical formula to be stored in a second detector.

Abstract: A static expansion method is performed by expanding a volume of a testing gas from V0 to V0+V1 between a second chamber of the volume V1 which is connected to an upstream side of a measurement chamber and a first chamber of the volume V0 which is connected to an upstream side of the second chamber, wherein the first camber is in communication with the second chamber via a first valve, wherein the second chamber is in communication with the measurement chamber via each of a second valve and an orifice or porous plug, respectively. When the first valve is opened and the second valve is closed, the testing gas flows from the first chamber via the second chamber into the measurement chamber only through the orifice or porous plug.

Abstract: A method for determining a liquid level in a tank of a vehicle uses an ultrasonic sensor for emitting and receiving ultrasonic waves. Basically the liquid level is determined based upon measuring the transition time of an ultrasonic wave emitted by the ultrasonic sensor, wherein the emitted wave is deflected two times before being reflected by the surface of the liquid contained in the tank.

Abstract: Diffuse reflectance spectroscopy apparatus for use in analyzing a sample comprising a sample receiving location (2) for receiving a sample (3) for analysis; an illumination arrangement (4) for directing light towards a received sample; a detector (6) for detecting light reflected by a received sample; and collection optics (5) for directing light reflected by a received sample towards the detector. The illumination arrangement further comprises an interferometer (42) and a half beam block (45a, 45b) which is disposed substantially at a focus in the optical path for blocking light which exits the interferometer, passes said focus, and is reflected from reentering the interferometer.

Abstract: Sampling systems for use on production lines with the capability to measure chemical components of a gas, vapor, or liquid sample taken from a product on the line and at a faster rate than the individual sensors alone are capable of. In one embodiment, the system detects the presence of insoluble hydrocarbons in the gas vapor present inside refillable water bottles that have been returned by the consumer. Each sampling system—apparatus—comprises two or more sub-systems each comprising: one or more sensors for performing a measurement of interest on a gas, vapor, or liquid sample, valves and a pump for directing the flow of samples, optionally an enclosed volume to hold the sample, and all under the direction of a control system. The sampling system also automatically acts on the measurement to detect when defective goods have reached a point where they can be ejected from the production line.

Abstract: A hand-held processor system for processing data from an integrated MEMS (Micro-Electro-Mechanical-Systems) device disposed within a hand-held computer system and methods therefor. The Single Point Offset Correction (SPOC) process computes offset values to calibrate MEMS sensors using a single set of data measurements at an orientation without dynamic perturbation, and without requiring advance knowledge of orientation of the device. Arbitrary output biases, which are known to be dominant on a single axis, can be corrected to ensure consistent performance. The SPOC process provides a simple method to effectively calibrate a MEMS sensor without requiring extensive system resources. This process can be enhanced by additional estimations of sensor offsets using the set of data measurements or by use of rule-based empirical gain factors.

Abstract: A plurality of stacked and fixed gas supplying units U, each gas supplying unit U having at least four gas supply lines S is formed by opposingly combining and fixing two flow controllers 3, each flow controller 3 provided with a plurality of flow control units, to a gas inlet-side block 12 and a gas outlet-side block 13 that are disposed in parallel across an interval in plan view and providing each flow controller 3 with an inlet opening and closing valve 1 and an outlet opening and closing valve 5.

Abstract: A method of producing a standard seawater solution for nutrient salt measurement includes at least: an impurity removal treatment step (S2) of removing an impurity from a seawater sample containing a nutrient salt; a main sterilization treatment step (S4) of killing a microorganism in the seawater sample; a bottling step (S6) including pouring the treated seawater sample into a resin bottle (3) and hermetically sealing the resin bottle; and a metal sealing step (S7) including covering an outer surface of the resin bottle (3) after the hermetic sealing with a film-like material (5) including a metal film (or a metal foil) (5a) and sealing the resin bottle therein by reduced pressure suction.

Abstract: A method and apparatus for generating carbon monoxide and in particular a device for testing carbon monoxide detectors which utilizes the method and apparatus for generating carbon monoxide. A layer of Activated Carbon Cloth is heated so that it produces small quantities of carbon monoxide. The Activated Carbon Cloth may be provided in a removable cassette.

Abstract: Methods and systems are provided for an engine coupled capacitance-based humidity sensor. Degradation of the humidity sensor may be determined based on humidity readings while flowing gasses into an engine intake air downstream of the humidity sensor and upstream of a compressor change by less than a first threshold while pressure at the sensor changes greater then a second threshold. The variation in pressure can be changed by adjusting a throttle upstream and downstream of the compressor based on whether the humidity sensor is degraded or functional.

Abstract: The present invention relates to a calibration method of a sensor unit connected to a reaction vessel, wherein the sensor unit comprises at least one sensor device configured to be calibrated, at least one compartment containing a calibrating agent, and a housing. The method comprising inserting a sensitive element of the at least one sensor device into a compartment of the sensor unit containing a calibrating agent, withdrawing the sensitive element from the compartment; inserting the sensitive element into the reaction vessel and locking the sensor device in position, wherein the steps of the method are irreversible.

Abstract: A soot generating device suitable for calibration purposes and a method of using the device for calibrating a soot measuring apparatus are presented. The soot generating device includes a wick located relative to a burning zone, a gas diffusion shield surrounding the burning zone that allows a continuous stream of air into the combustion zone, and a fuel supply for delivering fuel to the wick.

Abstract: A method according one embodiment includes at least one of bubbling dried air through a hydrogen peroxide solution in a container for producing a first hydrogen peroxide vapor, and passing dried air from the moisture trap into a headspace above the hydrogen peroxide solution in a container for producing a second hydrogen peroxide vapor. Additional systems and methods are also presented.

Abstract: Electrolyte analyzers are used in a variety of ways, and problems vary from reagent deterioration due to reagent replenishment, mixing of foreign substances during reagent replenishment, electrode deterioration due to the passage of the validity date, to the operator's inputting errors. It is thus necessary to judge abnormalities of measured values resulting from such inappropriate usage, based on the fluctuation patterns of the results of daily electrolyte calibration. The fluctuation patterns of each measured item are extracted from the results of daily electrolyte calibration. The electromotive force balance ratio between the internal standard solution and high/low-concentration standard solutions is calculated as well as its fluctuation pattern. The obtained fluctuation patterns are compared against atypical fluctuation patterns stored in the electrolyte analyzer. When any of the extracted patterns matches any of the atypical patterns, the analyzer activates an alarm.

Abstract: Methods and systems for calibrating a sensor for measuring an analyte in a patient monitoring system are disclosed. The method includes calculating sensor drift; calibrating the sensor using at least one calibration fluid; and periodically updating the sensor calibration based on the sensor drift calculation. The system adjusts a gas concentration in a fluid. The method in one of several variations includes providing a calibration fluid; setting the analyte concentration in the first fluid to a first concentration with an adjustment mechanism; measuring the first analyte concentration with the sensor; setting the analyte concentration in the first fluid to a second concentration; measuring the second analyte concentration with the sensor; and determining the calibration coefficients for the sensor from the measured first and second analyte concentrations.

Abstract: Methods, systems, computer-readable media, and apparatuses for obtaining accurate gas sensor data are presented. A mobile device may receive gas sensor data from at least one gas sensor. The mobile device can include the at least one gas sensor and at least one environmental component. Additionally, the mobile device may receive environmental data from the at least one environmental component. Subsequently, the mobile device may calibrate the received gas sensor data based on the received environmental data and one or more reference characteristic curves. In one or more arrangements, the gas sensor can be a Metal Oxide Semiconductor (MOS) gas sensor or an electrochemical gas sensor configured to sense carbon monoxide.

Abstract: The function of a measuring device can be tested using a healthy person as an external control, provided that this person fulfils certain criteria and that particular method steps are adhered to.

Abstract: The present invention describes the dihydrate of 1,2-cyclohexanediaminplatinum(II)-bis-(4-methylbenzenesulfonate), a method for producing 1,2-cyclohexanediaminplatinum(II)-bis-(4-methylbenzenesulfonate) and the hydrates thereof, and the use of 1,2-cyclohexanediaminplatinum(II)-bis-(4-methylbenzenesulfonate) and of the hydrates thereof.

Abstract: A method of calibrating a glucose sensor, which method comprises: (a) preparing a first glucose-containing calibration solution by combining water or an aqueous solution with alpha and beta glucose, the alpha and beta glucose being provided in solid form; (b) exposing a glucose sensor to said first glucose-containing calibration solution and determining the sensor output; (c) exposing the glucose sensor to one or more further calibration solutions having different glucose concentrations from each other and from said first glucose-containing calibration solution and determining the sensor output for the or each calibration solution; and (d) determining a calibration curve from the sensor output data collected in steps (b) and (c).

Abstract: A method for operating a measuring device comprising the following steps: providing a first sample of the liquid; ascertaining an updated calibration function by means of a standard addition method, wherein the first sample is supplemented at least once with a standard solution, which has a known concentration of the measured ion; determining a measured value of concentration of the measured ion in the first sample; providing a second sample of the liquid; ascertaining a measured value of concentration of the measured ion in the second sample as a reference measured ion concentration (cref) by means of a reference method; and determining a difference (cdisturb) between the apparent measured ion concentration (capparent) and the reference measured ion concentration (cref) and deriving a correction value (ckorr) therefrom for future measured values of concentration of the measured ion in the liquid, as ascertained with the measuring device.

Abstract: An assembly includes a debris monitor mount, a motor, and a particle belt. The particle belt carries one or more metallic particles. The particle belt is driven by the motor. The particle belt extends proximate the debris monitor mount when driven by the motor.

Abstract: The present invention relates to a calibratable sensor unit for a reaction vessel, such as for example a fermenter (48), in particular a disposable fermenter, comprising at least one sensor device (14) to be calibrated and at least one compartment (26, 28, 30) containing a calibrating agent, the at least one sensor device and the at least one compartment (26, 28, 30) being accommodated movably relative to one another in a housing (12) that is connected to or can be connected to the reaction vessel (48), wherein the calibrating unit (10) is arranged to calibrate the at least one sensor device (14) by contact with the calibrating agent before chemical and/or physical parameters of a measurement substance are measured with the at least one sensor device (14). According to the invention it is proposed that the sensor device (10) is configured in such a way that the relative movement between the at least one sensor device (14) and the at least one compartment (26, 28, 30) can be carried out irreversibly.

Abstract: A breath test simulator for supplying a breath test analyzer with a vapor including ethyl alcohol includes a heated thermal mass to heat an inlet passage.

Abstract: In some aspects, methods, devices, and systems for monitoring sensor data and indicating recommendations for confirmation tests on a user interface are provided. Sensor data is received and is monitored to detect predetermined signal characteristics that are associated with a likelihood of inaccuracy of the sensor data. A recommendation for a confirmation test to be performed is indicated on a user interface after the occurrence of a predetermined signal characteristic is detected.

Abstract: A detection and identification system includes a sensor unit (100) having a sensor array that detects and identifies at least one chemical included in an air flow. The system also includes a pump (120) that drives the air flow through the detection and identification system, in which the pump receives the air flow that has passed out of the sensor unit. The system further includes an adsorption unit (130) that dries and cleans the air flow within the detection and identification system, to obtain a substantially dry and clean air flow, in which the adsorption unit receives the air flow that has passed out of the pump. The system also includes at least one valve (140) that receives the substantially dry and clean air flow that has passed through the adsorption unit. The valve provides the substantially dry and clean air flow to the sensor unit in a close-loop circulation operation to thereby clean a sensor array.

Abstract: An oxygen sensor controlling apparatus includes: a controller configured to obtain a degradation index of a detection element; obtain a sensor output; detect an internal resistance of the detection element by causing a temporary change between electrodes of the detection element; successively obtain a target resistance value corresponding to the internal resistance using a first sensor output that is a value of the sensor output obtained at a time before or after a period when the temporary change occurs and the degradation index; and feedback control energization of the heater so that the internal resistance becomes the target resistance value.

Abstract: A reaction chamber enables a reaction between received elemental mercury gas and an oxidizing agent gas. The reaction chamber includes a porous (or permeable) medium through which to pass the elemental mercury gas and the oxidizing agent gas. Passing of the elemental mercury gas and the oxidizing agent gas through the porous medium supports a number of useful functions. For example, the porous medium enhances mixing of the elemental mercury gas with the oxidizing agent gas to enhance a reaction. Also, the porous medium increases an amount of surface area in a reaction chamber on which reactions (e.g., heterogeneous surface reactions) can take place between the elemental mercury gas and the oxidizing agent gas to form oxidized mercury gas. Accordingly, the reaction chamber configured to include a porous medium enhances a conversion of elemental mercury gas into oxidized mercury gas.

Abstract: Various methods are provided for diagnosing an exhaust fluid sensor disposed in an exhaust fluid passage. By monitoring the sensor during conditions when it is in contact with the exhaust fluid and when it is not in contact with the exhaust fluid, an expected change in the sensor output can be monitored to identify whether the sensor is generating sufficiently accurate readings.

Abstract: An electronic balance for clearly indicating the degree of precision to a target weight value is provided. A signal converter (2) converts an electronic signal outputted from a weight detecting circuit (1) into a digital signal. A computing section (3) converts the digital signal into a measured weight value Wx, reads a target weight value Wd (=W0±?W) determined by a target center value W0 and a tolerance ±?W inputted from a weight setting unit (5) through an interface (4), compares the measured weight value Wx and the target weight value Wd to obtain a difference, and transmits a signal for flashing or turning on the character display corresponding to the difference and the measured weight value Wx to a display unit (6) and transmits a sound signal to a buzzer (7).

Abstract: The present invention relates to a calibration method of a sensor unit connected to a reaction vessel, wherein the sensor unit comprises at least one sensor device configured to be calibrated, at least one compartment containing a calibrating agent, and a housing. The method comprising inserting a sensitive element of the at least one sensor device into a compartment of the sensor unit containing a calibrating agent, withdrawing the sensitive element from the compartment; inserting the sensitive element into the reaction vessel and locking the sensor device in position, wherein the steps of the method are irreversible.

Abstract: A method and apparatus for measuring dissolved residue concentrations and particulate residue particle concentrations and size distribution in liquids, particularly colloidal suspensions. The method involves separating dissolved and particulate residues in liquids for subsequent analysis of the residue species. The method includes the steps of forming an aerosol from the liquid sample to be analyzed, evaporating the droplets in the aerosol to dryness, detecting and sizing the particles, and determining the liquid volumetric inspection rate. An apparatus for separating dissolved and particulate residues in liquids for determination of the concentrations of the two residue species as well as the size distribution of the particulate species is also disclosed. The apparatus includes a droplet former, a dryer communicatively connected to the droplet former, and a detector communicatively connected to the evaporator for detecting and sizing particles.

Abstract: Validation systems and methods are described. Specifically, the disclosed validation system has the ability to simultaneously or sequentially analyze the Reid Vapor Pressure (RVP) or any other property of process samples taken from the same or different sources. The validation system is scalable to validate with multiple reference samples to one or multiple analyzers. The system is also scalable to operate multiple streams of a single or multiple fuels to multiple analyzers.

Abstract: One embodiment of the invention provides an air treatment device. The air treatment device comprises: an air purifying unit, configured to purify air; an air sensor, configured to measure a first air quantity and provide a measurement output, wherein the first air quantity comprises the purified air purified by the air purifying unit; and a processor, configured to generate a first value based on the measurement output of the air sensor so as to calibrate the air sensor. With the air treatment device of one embodiment of the invention, clean air, i.e. zero air, is generated locally by the air treatment device so as to calibrate the air sensor, without the need for externally generating the zero air, which brings convenience for the user or other operators performing calibration of the air sensor of the air treatment device. Another embodiment of the invention also provides a method of calibrating an air sensor of an air treatment device.

Abstract: Methods and systems for preparation of calibrant infusion fluid sources are disclosed. In one embodiment, a precise volume of glucose is injected into a saline-solution filled calibrant infusion fluid source proximate in time to conducting a calibration procedure. The glucose concentration in the calibrant infusion fluid source is subsequently calculated based on the measured weight of the saline-solution, as determined prior to glucose injection, and the volume of glucose injected. This method provides a highly accurate and convenient manner for use in a hospital environment, for example, with an intravenous blood glucose sensor system. In another embodiment, a premixed calibrant infusion fluid source is provided that includes saline solution and a predetermined concentration of glucose. In such embodiments, shelf life problems related to water evaporation are mitigated by hermetically covering or otherwise hermetically containing the calibrant infusion fluid source up until the point of use.

Abstract: A rheometer is standardized to a prescribed rheological measurement reference standard by: a so-called ‘Cluster Die’, with one or more die orifices matched to a standard Melt Flow Index Die; an orifice matched to a standard Melt Flow Index Die to produce both a ‘multiplier’ pressure drop and equivalent overall rheological effect; individual or combined regional adjustments; a slow matching taper to conjoin two flow regions with minimal interference of flow pattern or pressure drop; thermometer placement in the body surrounds of a heated die; calibration of a thermometer for die melt temperature by a combination of temporary and permanent placements of other thermometers; a temperature stabilization device for melt pressure transducers of rigid or flexible stem construction; a polymer plant gear pump polymer melt drive adapted for rheometry using internal flow restriction as a rheometer die.

Abstract: A continuous emissions monitoring system is in fluid communication with a flue stack conducting exhaust gas from a combustion source. The continuous emissions monitor system comprises an analyzer for measuring concentrations of an analyte present in the exhaust gas. A probe is in fluid communication with the flue stack to acquire a sample of exhaust gas from the flue stack. The probe is also in fluid communication with and located upstream of the analyzer. The probe tends to remove analyte from the sample. A calibration checking system is in fluid communication with the probe. The calibration checking system includes a source that provides a flow of a known concentration of calibration material to be measured by the analyzer. The calibration material is the same as the analyte. A humidifier is associated with the source to provide moisture to a flow of calibration material.

Abstract: Methods and systems for preparation of calibrant infusion fluid sources are disclosed. In one embodiment, a precise volume of glucose is injected into a saline-solution filled calibrant infusion fluid source proximate in time to conducting a calibration procedure. The glucose concentration in the calibrant infusion fluid source is subsequently calculated based on the measured weight of the saline-solution, as determined prior to glucose injection, and the volume of glucose injected. This method provides a highly accurate and convenient manner for use in a hospital environment, for example, with an intravenous blood glucose sensor system. In another embodiment, a premixed calibrant infusion fluid source is provided that includes saline solution and a predetermined concentration of glucose. In such embodiments, shelf life problems related to water evaporation are mitigated by hermetically covering or otherwise hermetically containing the calibrant infusion fluid source up until the point of use.

Abstract: A calibration card 10 and method of using the card 10 to calibrate an optical sensor. The card 10 comprises (i) a first mass of an oxygen sensitive fluorophore 41 configured and arranged for limiting exposure of the first mass of oxygen sensitive fluorophore 41 to near zero % oxygen, and (ii) a second mass of an oxygen sensitive fluorophore 42 configured and arranged for exposing the second mass of fluorophore 42 to an environmental concentration of oxygen.

Abstract: A method and test devices are used for field calibration of gas detectors. Brand new gas detectors are used as measurement standards in field calibration. The brand new gas detectors are in this case either employed directly as working standards, in which case the regular calibration by a reference standard is dispensed with, since the brand new gas detectors are always deemed to be sufficiently accurate. Alternatively, the brand new gas detectors are employed directly, namely as sufficiently accurately calibrated reference standards for the reference gas sensors acting as working standards and incorporated into the test device. In both cases the measured values of the gas sensors in the gas detectors to be calibrated are fed back to a sufficiently calibrated system, namely either directly to at least one brand new gas detector as a working standard or else to a reference sensor of a calibrated test device.

Abstract: A system and method for determining whether a hydrogen concentration sensor in the exhaust of a fuel cell system is operating properly during operation of the system. The method includes injecting hydrogen gas pulses from an injector directly into the system exhaust and analyzing a sensor response from those hydrogen injection pulses. Alternately, pulses from anode purges or bleeds can be provided to the exhaust to determine sensor response.

Abstract: A method and a device for providing a predeterminable concentration of at least one component in a microscopic sample liquid medium are described. The device includes a feeding device for the at least one component. Measurement data are determined, measuring a predeterminable parameter using a microscopic method. The concentration of the at least one component is adjusted or controlled via the feeding device based on the basis of measurement data.

Abstract: A method validating a particulate monitoring device includes generating a final gas stream having a particulate material concentration that corresponds to a target particulate material concentration, using the particulate monitoring device to measure the particulate material concentration in the final gas stream, and evaluating an accuracy of the particulate monitoring device based on a comparison of the particulate concentration in the final gas stream that was measured by the particulate monitoring device with the target particulate material concentration.

Abstract: A calibration device and method of using the device to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The device includes at least (a) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen, and in fluid communication with an activated metal-air battery whereby any oxygen permeating into the hermetically sealed space is quickly consumed by the battery, and (b) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with an environmental concentration of oxygen.

Abstract: This invention provides a biological component-measuring device, enabling the operator to easily calibrate the entire device and capable of measuring biological components accurately, and a method for calibrating the device. The device measures a sample including a body fluid taken through a body fluid sampler by sending it with a pump through a sample channel to a sensor. The device further includes a calibrating liquid channel through which a calibrating liquid can be supplied to the sensor via the sample channel by a switching of a first flow path changeover valve placed in the sample channel at a location upstream of the pump and connected to the channel. The method includes introducing the calibrating liquid in the calibrating liquid channel, via other channels, into the sensor by switching the valve.