Abstract: An ion concentration measurement system is provided. The ion concentration measurement system has: at least an end system having a sensing unit for measuring the ion concentration of a test solution to generate at least a sensing signal; a control unit for controlling the acquisition of the sensing signal; a display unit for displaying the sensing signal in real time; and an end wireless transmission interface for transmitting the sensing signal wirelessly.

Abstract: A separative extended gate field effect transistor based uric acid sensing device is provided, including: a substrate; a conductive layer including a silver paste layer on the substrate and a graphite-based paste layer on the silver paste layer; a conductive wire extended from the conductive layer; a titanium dioxide layer on the conductive layer; and a uric acid enzyme sensing film on the titanium dioxide layer.

Abstract: The invention provides a method for forming an extended gate field effect transistor (EGFET) based sensor, including: (a) providing a substrate; (b) forming a sensing film including titanium dioxide, ruthenium doped titanium dioxide or ruthenium oxide on the substrate; and (c) forming a conductive wire extended from the sensing film for external contact.

Abstract: The invention provides a multi-electrode measuring system including a front end device which is a sensing device including a multi-electrode sensing device having a plurality of electrodes; a multi-channel fixture coupled to the multi-electrode sensing device; and a reference electrode. A back-end device as a virtual instrumentation is an electronic device including a read out circuit device coupled to the multi-channel fixture and the reference electrode for receiving each original signal from each electrode of the multi-electrode sensing device and the reference electrode determining a sample solution; a data acquisition device coupled to the read out circuit device for digitizing each original signal to form a digital signal and for array sampling; and a signal processing device coupled to the data acquisition device for processing each signal.

Abstract: A measurement device measuring a solution and including a reference voltage generating unit, a plurality of sensing units, a reading unit and a processing unit is disclosed. The reference voltage generating unit is disposed in the solution to generate a reference voltage. The sensing units are disposed in the solution to generate a plurality of output signals relating to the reference voltage. The reading unit outputs a reading signal according to one of the output signals. The processing unit generates a measuring signal according to the reading signals.

Abstract: A biosensor containing ruthenium, measurement using the same, and the application thereof. The biosensor comprises an extended gate field effect transistor (EGFET) structure, including a metal oxide semiconductor field effect transistor (MOSFET), a sensing unit comprising a substrate, a layer comprising ruthenium on the substrate, and a metal wire connecting the MOSFET and the sensing unit.

Abstract: The invention provides a method for forming a sodium ion selective electrode, including: (a) providing a conductive substrate; (b) forming a conductive wire which extends from the conductive substrate for external contact; and (c) forming a sodium ion sensing film on the conductive substrate, wherein the method for forming the conductive substrate includes: providing a substrate; and forming a conductive layer on the substrate.

Abstract: The present invention discloses a method and an apparatus of the drift calibration of sensors. The method includes shifting the sensing signal and differential technology to remove the drift signal by time during a long measuring. The apparatus includes two voltage sensors and readout circuits, a signal-shifting circuit and a differential circuit, and the apparatus is used for outputting the response signal without time drifting.

Abstract: The invention provides a multi-electrode measuring system including a front end device which is a sensing device including a multi-electrode sensing device having a plurality of electrodes; a multi-channel fixture coupled to the multi-electrode sensing device; and a reference electrode. A back-end device as a virtual instrumentation is an electronic device including a read out circuit device coupled to the multi-channel fixture and the reference electrode for receiving each original signal from each electrode of the multi-electrode sensing device and the reference electrode determining a sample solution; a data acquisition device coupled to the read out circuit device for digitizing each original signal to form a digital signal and for array sampling; and a signal processing device coupled to the data acquisition device for processing each signal.

Abstract: An ion concentration measurement system is provided. The ion concentration measurement system has: at least an end system having a sensing unit for measuring the ion concentration of a test solution to generate at least a sensing signal; a control unit for controlling the acquisition of the sensing signal; a display unit for displaying the sensing signal in real time; and an end wireless transmission interface for transmitting the sensing signal wirelessly.

Abstract: An optical gas concentration sensor and method for measuring blood gas based on the light adsorption sensing technique are disclosed. The optical gas concentration sensor comprises a light source, a photo detector, and a gas filtering membrane for separating the indicator and a liquid. A gas in the liquid diffuses to the indicator through the gas filtering membrane so as to change the color of the indicator due to the chemical reaction occurred between the indicator and the gas. Then, the photo detector receives the light passing though the reacted indicator from the light source. The gas concentration is determined based on pH-sensitive absorbance spectrum of the indicator.

Abstract: The invention provides a method for measuring a pH value of a sample solution, which is performed by a pH sensing device, including: providing a pH sensing device and a sample solution, wherein the pH sensing device includes a pH sensor array, and the pH sensor array comprises m pH sensors, and m is an integer greater than 1; measuring the sample solution with the pH sensor array for n times, wherein n is an integer greater than 1, n measurement values are generated, each pH sensor generates a measurement value for each measurement, and the total amount of measurement values generated is n×m; and generating a pH value of the sample solution by all of the measurement values generated by the pH sensor array.

Abstract: A system of measuring pH of a solution having a calibration device to counteract time-drift effect. The calibration device of the system adjusts a compensation voltage to zero a measuring voltage of a first sensor and only respond to time-drift voltage of the first sensor. The calibration device has a differential operation amplifier receiving measuring voltages from the first sensor and a second sensor of the system to eliminate the time-drift voltages of the first and second sensors, thereby achieving calibration of the time-drift effects.

Abstract: An amperometric sensor for uric acid and a manufacturing method thereof are disclosed, in which polyacrylamide is used to fix catalase, uricase and ferrocenecarboxylic acid on a working electrode. In determining concentration of uric acid, hydrogen peroxide is produced when enzyme and uric acid react with each other and then a reduction current generated from enzyme on the electrode with an external voltage 200 mV applied is detected. In determining concentration of uric acid, a concentration range of 2.5-20 mg/dl is achieved and sensibility of the sensor in a linear portion is 5.17 uAcm?2(mg/dl)?1. In addition, reaction time required for the reaction between enzyme and uric acid is 5.17 uAcm?2(mg/dl)?1.

Abstract: The invention provides a method for forming a sodium ion selective electrode, including: (a) providing a conductive substrate; (b) forming a conductive wire which extends from the conductive substrate for external contact; and (c) forming a sodium ion sensing film on the conductive substrate, wherein the method for forming the conductive substrate includes: providing a substrate; and forming a conductive layer on the substrate.

Abstract: In this invention, a separative structure of the ion-selecting electrode is applied to fabricate the dual type potentiometric biosensor for creatinine detection. According to the fabrication process, the creatinine enzyme is immobilized onto a conductive layer of a substrate of pH sensing membrane and ammonium ion-selecting membrane. The conductive layer provides with a sensing region and a non-sensing region. A conductive line is extended from the conductive layer for using as an external electrical contact point. The dual type potentiometric creatinine biosensor was fabricated by using the enzyme immobilization method onto the surface of the selecting membrane of sensing membrane of pH sensing electrode and creatinine sensor.

Abstract: A biosensor containing ruthenium, measurement using the same, and the application thereof. The biosensor comprises an extended gate field effect transistor (EGFET) structure, including a metal oxide semiconductor field effect transistor (MOSFET), a sensing unit comprising a substrate, a layer comprising ruthenium on the substrate, and a metal wire connecting the MOSFET and the sensing unit.

Abstract: An ion solution concentration-detecting device includes a working electrode, a reference electrode, and a link element. The working electrode and the reference electrode are inserted into the link element. The working electrode, inserted into the link element, is replaceable, for the better sensitivity to the different ion solution. The working electrode being a contact-detecting electrode can be replaced by another contact-detecting electrode with different sensing membrane. The reference electrode includes a polymeric membrane with ion material covering silver/silver chloride (Ag/AgCl) electrode to provide a fixed and stable electrical potential. The working electrode may be a contact-detecting electrode having a sensing membrane. The sensing membrane may be a metal oxide or a polymer with ion material for measuring different ion solution effectively.

Abstract: Preparation of a pH sensor, the prepared pH sensor, system comprising the same, and measurement using the system. The pH sensor is an extended gate field effect transistor (EGFET) structure. The preparation includes the steps of providing an extended gate ion sensitive field effect transistor comprising an extended gate region, forming a titanium nitride film on the extended gate region by RF sputtering deposition to obtain a pH sensor.

Abstract: This invention provides an extended gate ion-sensitive field effect transistor as a pH sensor for measuring the pH value of a solution under test. This invention also provides a pH sensing system comprising a separable and flexible pH sensor for measuring the pH value of a solution under test, wherein the transistor of the pH sensor can be prevented from direct contact with the solution.