Provertha electrical components Germany Provertha model Provertha price

Provertha electrical components are commonly used temperature-sensing elements in temperature measurement instruments. They directly measure temperature and convert the temperature signal into a thermoelectric EMF signal, which is then converted into the temperature of the measured medium by an electrical instrument (secondary instrument). The external shapes of various thermocouples often differ significantly depending on requirements, but their basic structures are largely similar, typically consisting of main parts such as hot electrodes, insulating protective tubes, and terminal boxes. They are usually used in conjunction with display instruments, recording instruments, and electronic regulators. In industrial production processes, temperature is one of the important parameters that need to be measured and controlled. In temperature measurement, thermocouples are widely used due to many advantages such as simple structure, ease of manufacturing, wide measurement range, high accuracy, low inertia, and output signals suitable for long-distance transmission. In addition, since a thermocouple is a passive sensor that does not require an external power supply during measurement, it is very convenient to use and is often used to measure the temperature of gases or liquids inside furnaces and pipes, as well as the surface temperature of solids.

Provertha electrical component applications

Photoelectric sensors that use photoelectric elements as sensitive components come in many types and have wide-ranging applications. According to the nature of the output quantity of photoelectric sensors, they can be divided into two categories: (1) Photoelectric measuring instruments that convert the measured quantity into a continuously changing photocurrent, which can be used to measure physical quantities such as light intensity, object temperature, light transmittance, displacement, and surface condition. For example: illuminance meters for measuring light intensity, photoelectric pyrometers, photoelectric colorimeters, and turbidimeters, photoelectric alarms for fire prevention, and automatic inspection devices and instruments for checking the diameter, length, ellipticity, and surface roughness of machined parts, all of which use photoelectric elements as sensitive components. Semiconductor photoelectric elements are not only widely used in civil industrial fields but also hold an important position in military applications. For example, lead sulfide photoresistors can be used to make infrared night vision devices, infrared cameras, and infrared navigation systems; (4) Converting the measured quantity into a continuously changing photocurrent. Various photoelectric automatic devices are made using the characteristic of photoelectric elements to output "yes" or "no" electrical signals when exposed to light or no light. Photoelectric elements are used as switching photoelectric conversion elements. Examples include photoelectric input devices for electronic computers, switching temperature regulation devices, and digital photoelectric tachometers for speed measurement.

Provertha electrical component principle

The absorption film irradiated by infrared rays is a thin film with small heat capacity and easy temperature rise. A cavity structure is located at the lower part close to the center of the substrate. This structural design ensures a temperature difference between the cold end and the measuring end. The thermocouple is composed of polysilicon and aluminum, connected in series. When the temperature at the measuring end of each thermocouple rises, a thermoelectric EMF Vn is generated between the thermocouples, so the sum of their voltages can be obtained at the output terminal.

Provertha electrical component applications

The basic circuits of analog integrated circuits include current sources, single-stage amplifiers, filters, feedback circuits, current mirror circuits, etc. Higher-level basic circuits composed of them include operational amplifiers and comparators, while even higher-level circuits include switched-capacitor circuits, phase-locked loops, ADC/DAC, etc. Based on the response relationship between output and input signals, analog integrated circuits can be divided into two major categories: linear integrated circuits and nonlinear integrated circuits. The response between the output and input signals of the former is usually linear; the shape of the output signal is similar to that of the input signal, only amplified by a fixed coefficient. In contrast, the response of the output signal to the input signal in nonlinear integrated circuits exhibits a nonlinear relationship, such as square or logarithmic relationships, hence they are called nonlinear circuits. Common nonlinear circuits include oscillators, timers, and phase-locked loop circuits. Typical applications of analog integrated circuits are shown in the figure below. External natural signals collected by various sensors or antennas, such as temperature, humidity, optical, piezoelectric, and acoustic sensors, are preprocessed by analog circuits and converted into suitable digital signals for input into digital systems. Signals processed by the digital system are then post-processed by analog circuits and converted into analog signals such as sound, images, and radio waves for output.

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