thermistor
Thermistor -based breathing sensor for circadian rhythm evaluation
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One of the most frequently used methods to sense breathing pattern is to detect airflow using a nasal thermistor or a thermocouple sensor. Prolonged, minimally intrusive measurement of the breathing pattern is particularly important for polysomnography, sleeping disorders
Enzyme thermistor analysis of heavy metal ions with use of immobilized urease
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The utilization of immobilized enzymes in clinical chemistry [ 2] and environmental analysis [ 4] is in rapid progress, but only a few reports are available on the determination of enzyme inhibitors [ 6 3. Quantitative analysis of competitive inhibitors has been
A general enzyme thermistor based on specific reversible immobilization using the antigen-antibody interaction
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Enthalpimetric enzyme assay has appeared to be very general since the transducer registers any heat produced in an enzyme catalyzed reaction [l-3]. The combination of immobilized enzymes and enthalpimetric assays-the enzyme thermistor techniquehas
Accuracy of oximetry with thermistor (OxiFlow) for diagnosis of obstructive sleep apnea and hypopnea
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Objectives: To evaluate the diagnostic accuracy for obstructive sleep apnea and hypopnea (OSAH) of the OxiFlow (OF) device which combines oximetry with recording of thermistor airflow. Design Setting: Patients scheduled for overnight diagnostic polysomnography
Determination of enzyme activities with the enzyme thermistor unit
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Practically all enzyrnic reactions can be followed by calorimetry. Important advantages of this technique are that the optical properties of the sample do not interfere with the measurements and that no auxiliary enzymic reactions are required such as those leading to
Existence and regularity of solutions of a nonlinear nonuniformly elliptic system arising from a thermistor problem
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A thermistor is an electric circuit device made of ceramic material whose electric conductivity depends on the temperature. If the only heat source is the electric heating, the temperature and the electric potential satisfy a nonlinear elliptic system which is also degenerate if the
Two temperature-compensated thermistor current meters for use in marine ecology
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Small bead thermistors of the type commonly used for temperature measurement can be adapted for use as current probes in liquid or gaseous media. The small size, the rapid response, and the sensitivity of such probes make them well suited for the study of water
The thermistor problem with one-zero conductivity
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Thermistors are modeled as a system of two nonlinear elliptic equations for the electric potential 4p and the temperature u. The electric conductivity 0 (a) is temperature dependent. The case o(u): 1 if u u*, 0 (u)= 0 if u 2 u* is a good approximation for many thermistors. In
A posteriori error analysis for FEM of thermistor problems
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The system of equations that govern thermistor behavior has a long history. Recently, it has been the subject of intensive investigations, see eg for a survey of the subject. We are interested in this paper in the version of the system that has been recently proposed as a model for micromachined
Convective velocity effects on a thermistor in water
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Because water has absorption properties for ionizing r: idiation similar to biological tissue, it has been chosen as the standard reference material for radiation therap»[I). Therefore, the absorbed dosewater calorimeter was devised [2) and developed [3J for investigative stndies
Determination of thermal conductivity of food materials using a bead thermistor
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Aseptic processing is defined as the filling of presterilized containers with sterile or commercially sterile product and hermetically sealing them under aseptic conditions (Lopez, 1986). The first aseptic process was devised in Denmark in the early l920s. In 193 the
Thermistor temperature transducer-to-ADC application
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One of the applications of op amps is converting and conditioning signals from transducers into signals that other devices, including analog-to-digital converters (ADCs), can use. The reason any conversion or conditioning is necessary is that the range and offset of the
Coupled electric, thermal and elastic simulation of BaTi03 PTC thermistor
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The coupled electric, thermal and elastic field simulation is described for a model of BaTiO, based PTC thermistor . r The equivalent stress distribution is calculated to analyze the thermal shock generated by the transient temperature gradient. Since the thermal time
Application of the enzyme thermistor for determination of mercury and other heavy metals using free and immobilised alcohol oxidase
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This paper describes an enzymatic procedure for determination of mercury (I) and (II) based on the reversible competitive inhibition of free and immobilised alcohol oxidase Free enzyme was used in combination with immobilised catalase on controlled pore glass (CPG)
Determination thermal and physical characteristics of liquids using pulse heating thermistor method
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This work addresses of the research thermal and physical characteristics of different liquids by non-destructive method. Proposed to determine the thermal conductivity of liquids used by pulse heating thermistor method. Considered calculation the unit to determine thermal
A silicon carbide thermistor
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Semiconductor Physics, Quantum Electronics Optoelectronics. V. N 4. P. 67-70 200 V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine NS Boltovets VV Kholevchuk RV Konakova Ya.Ya. Kudryk PM Lytvyn VV
Temperature Measurement with a Thermistor and an Arduino
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A thermistor indicates temperature by a change in electrical resistance. The analog input pins of the Arduino can only measure voltage, so the electrical resistance of a thermistor cannot be measured directly1. A simple technique for converting the (variable) resistance of
The thermistor problem with zero-one conductivity II
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Thermistors are modeled as a system of two nonlinear elliptic equations for the electric potentials go and the temperature u. The electric conductivity 0 (a) is temperature dependent.Ve consider here the case 0-(U): 1 if u u*, 0 (u) I 0 if u> u*, which is a good
THz Antenna-Coupled Microbolometer with 0.1-µm-wide Titanium Thermistor
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Antenna-coupled microbolometers to detect terahertz wave were fabricated and their characteristics were evaluated at room temperature. The microbolometer consists of an integrated heater- thermistor and half-wave dipole antenna designed for 1 THz. The width of
Thermistor -based thermal conductivity measurement system
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This report describes a patented method for using commercially available thermistors to make in-situ thermal conductivity measurements with commonly available thermistors to make in-situ thermal conductivity measurements with commonly available electronic
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