The invention relates to a method for calibrating a temperature measuring device of a dental oven by means of at least one calibration element, which is heated in the dental oven during a heating time interval (dt), wherein the at least one calibration element has at least one measurement material having a reversible phase transition occurring at a first transition temperature (TC1), the phase transition causes an abrupt change of at least one first parameter (I) of the dental oven, the temperature in the furnace chamber is measured by means of the temperature measuring device as an actual temperature (T), and the parameter (I) is measured, at least one first abrupt change (dI1) of the first parameter (I) is identified, a deviation of the first actual temperature value (T1), which is measured by the temperature measuring device when the first abrupt change (dI1) of the first parameter (I) occurs, from the first transition temperature (TC1) is determined, and the actual temperature (T) of the temperature measuring device is corrected in accordance with the deviation.

A method includes post processing a plurality of temperature sensors grouped into a plurality of sets. For each set of the plurality of sets, a post-processing system coupled to corresponding temperature sensors receives a plurality output signals generated by the corresponding temperature sensors. For each set of the plurality of sets, the post-processing system computes values representing proportional to absolute temperature (PTAT) voltages and values representing internal reference voltages based on output signals generated by the corresponding temperature sensors. For each set of the plurality of sets, the post-processing system computes an average of the values representing the PTAT voltages and relative PTAT voltage variation coefficients. For each set of the plurality of sets, the post-processing system computes values representing corrected PTAT voltages using the relative PTAT voltage variation coefficients.

The object of the invention is a temperature calibrator for calibrating temperature sensors, wherein the temperature calibrator comprises at least one calibration volume, the temperature of which is to be adjusted and into which the temperature sensors to be calibrated can be inserted, at least one temperature control unit, which is in thermal contact with the calibration volume via one or several thermally conductive bodies, at least one temperature sensor, which is in thermal contact with said calibration volume, and at least one electrical control unit, which is electrically connected with the at least one temperature control unit and the at least one temperature sensor, wherein the temperature calibrator further comprises at least one magnetocaloric material and at least one magnetic field generating device.

A failure diagnosis method of a temperature sensor of a switch device is provided. The method includes setting a sampling period using a temperature detected by the temperature sensor of the switch device and a temperature of cooling water for cooling the switch device. A temperature sensing value detected by the temperature sensor is then compared with a temperature reference value stored in a memory in the sampling period to determine whether failure occurs in the temperature sensor.

Systems and methods that provide measurement of liquid levels in a container, such as a calibration bath container, may utilize an acoustic transducer subsystem that includes one or more acoustic transducers that are controlled by a controller. The acoustic transducer subsystem emits acoustic signals toward a surface of a liquid in a container, and detects reflected acoustic signals that are reflected from the surface of the liquid. The liquid level sensor utilizes an acoustic waveguide subsystem to allow the acoustic transducer subsystem to be spaced apart from the liquid, which protects the acoustic transducer system another other components from damage due to heat, liquid, and vapor. The acoustic waveguide subsystem also channels the emitted and reflected acoustic signals to prevent substantial scattering of the signals within the container, which greatly improves the accuracy of the liquid level sensor.

Generally described, embodiments are directed to a temperature calibration system that includes a calibration unit, a closed fluidic system configured to remove heat from the calibration unit, and a cooling assembly configured to remove heat from the closed fluidic system. The closed fluidic system includes a fluid that has a critical point that is less than a temperature that would cause damage to the cooling assembly.

A block calibrator for calibrating a temperature sensor includes a calibrator sleeve having at least one sensor bore into which the temperature sensor is insertable along a longitudinal direction. The calibration sleeve also includes a body having at least two sections having different thermal conductivities.

A device for determining the temperature of a medium in a tube or in a container is disclosed. The device includes a measuring tube protruding into the medium and closed at the end facing the medium by a measuring tube base, a resistance-based temperature sensor as a main sensor, and a thermoelectric voltage-based temperature sensor as an auxiliary sensor, arranged within the measuring tube at a fixed offset relative to the main sensor. The main sensor and the auxiliary sensor transmit measurement values to an analysis/transmitter unit. If the amount of a difference between the measurement values of the main sensor and the auxiliary sensor exceeds a first specified threshold, a fault notification relating to the integrity of the device is generated in the analysis/transmitter unit.

A fluorescence temperature measurement material, a preparation method therefore and use thereof are disclosed, which belong to the technical field of fluorescence temperature sensing. The fluorescence temperature measurement material has a chemical composition of Na.sub.1-xSr.sub.xTaO.sub.3:yPr.sup.3+, x=0.1-0.2 and y=0.4%-0.6%. The fluorescence temperature measurement material is prepared by a high-temperature solid-phase method and generates blue light at 492 nm (.sup.3P.sub.0.fwdarw..sup.3H.sub.4) and red light at 610 nm (.sup.1D.sub.2.fwdarw..sup.3H.sub.4) under the excitation of 290 nm ultraviolet light. The fluorescence intensity ratio (.sup.1D.sub.2.fwdarw..sup.3H.sub.4/.sup.3P.sub.0.fwdarw..sup.3H.sub.4) of two emission peaks has an exponential function relationship with temperature, so that the fluorescence temperature measurement material can calibrate temperature and has good temperature-sensitive performance. Moreover, the fluorescence temperature measurement material has a particle size of <1 ?m, a good spatial resolution and a significant CIE color coordinate change along with temperature.

A temperature controlled calibration source for thermal imaging that provides for extremely inexpensive, mass producible, field deployable thermal calibration in specific, relatively low temperature ranges, and in particular temperatures near nominal human body temperature. A calibration source suitable for such applications may be implemented primarily as a suitable designed Printed Circuit Board (PCB), packaged in a thermally isolating housing and powered of commonly available power sources such as USB chargers.