schawohl electrical components Germany schawohl model schawohl price

schawohl 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 blocks. 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 extremely widely used. They have many advantages, such as simple structure, ease of manufacturing, wide measurement range, high precision, low inertia, and output signals that are easy to transmit over long distances. 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. Therefore, it is often used to measure the temperature of gases or liquids inside furnaces and pipelines, as well as the surface temperature of solids.

schawohl electrical component classification

1. By application: pressure-sensitive and force-sensitive sensors, position sensors, level sensors, energy consumption sensors, speed sensors, acceleration sensors, radiation sensors, thermal sensors. 2. By principle: vibration sensors, humidity-sensitive sensors, magnetic-sensitive sensors, gas-sensitive sensors, vacuum degree sensors, biological sensors, etc. 3. By output signal: (1) Analog sensors can convert non-electrical quantities being measured into analog electrical signals. (2) Digital sensors: convert non-electrical quantities being measured into digital output signals (including direct and indirect conversion). (3) Pseudo-digital sensors: convert the signal quantity being measured into frequency signals or short-period signal outputs (including direct or indirect conversion). (4) Switch sensors: when a signal being measured reaches a specific threshold, the sensor correspondingly outputs a set low-level or high-level signal. 4. By manufacturing process: Integrated sensors are manufactured using standard production processes for silicon-based semiconductor integrated circuits. Usually, part of the circuitry for preliminary processing of the measured signal is also integrated on the same chip. Thin-film sensors are formed by depositing thin films of corresponding sensitive materials on a dielectric substrate (base plate). When using hybrid processes, part of the circuitry can also be fabricated on this substrate. Thick-film sensors are made by coating slurries of corresponding materials onto ceramic substrates, which are usually made of alumina, followed by heat treatment to form the thick film. Ceramic sensors are produced using standard ceramic processes or certain variants (sol-gel, etc.). After appropriate preparatory operations, the formed elements are sintered at high temperatures. There are many common characteristics between thick-film and ceramic sensor processes; in some respects, the thick-film process can be considered a variant of the ceramic process. Each process technology has its own advantages and disadvantages. Due to lower capital investment required for research, development, and production, as well as the high stability of sensor parameters, it is more reasonable to adopt ceramic and thick-film sensors. 5. By measurement purpose: Physical sensors are made using characteristics where certain physical properties of the substance being measured undergo significant changes. Chemical sensors are made using sensitive elements that can convert chemical quantities such as composition and concentration of chemical substances into electrical quantities. Biological sensors are made using various biological or biomaterial characteristics to detect and identify chemical components in biological bodies. 6. By composition: (1) Basic sensors are the most fundamental single transduction devices. (2) Combined sensors are sensors composed of different single transduction devices. (3) Application-specific sensors are sensors composed of basic sensors or combined sensors together with other mechanisms. 14. By mode of action: Sensors can be divided into active and passive types based on their mode of action. Active sensors include acting type and reaction type. Such sensors can emit a certain detection signal to the object being measured, detect changes produced in the object by the detection signal, or form a signal by generating an effect in the object via the detection signal. Those that detect changes in the detection signal are called acting type, while those that detect responses to form signals are called reaction type. Radar and radio frequency range detectors are examples of acting type, while photoacoustic effect analysis devices and laser analyzers are examples of reaction type. Passive sensors only receive signals generated by the object itself, such as infrared radiation thermometers and infrared imaging devices.

schawohl electrical component structure

The main purpose of fiber optic connectors is to achieve fiber splicing. Fiber optic connectors, which are widely used in fiber optic communication systems, come in many types with varying structures. However, upon closer examination, the basic structure of various types of fiber optic connectors is consistent. That is, the vast majority of fiber optic connectors generally use high-precision components (consisting of two ferrules and one coupling tube, totaling three parts) to achieve aligned connection of the fibers. This method involves inserting and fixing the fiber into the ferrule, polishing the ferrule surface, and achieving alignment within the coupling tube. The outer components of the ferrule are made of metal or non-metallic materials. The mating end of the ferrule must be ground, while the other end usually employs a strain relief member to support the fiber or fiber optic cable to release stress. The coupling tube is generally made of two halves synthesized from materials such as ceramic or bronze, forming a tight cylindrical component, often equipped with metal or plastic flanges to facilitate installation and fixation of the connector. To align the fibers as precisely as possible, the machining precision requirements for the ferrule and coupling tube are very high.

schawohl electrical component principle

The basic principle of a multimeter is to use a sensitive moving-coil DC ammeter (microammeter) as the meter head. When a small current passes through the meter head, there will be a current indication. However, the meter head cannot handle large currents, so resistors must be connected in parallel and series with the meter head to shunt or reduce voltage, thereby measuring current, voltage, and resistance in the circuit. The measurement process of a digital multimeter involves a conversion circuit converting the measured quantity into a DC voltage signal, then an analog-to-digital (A/D) converter converting the analog voltage into a digital quantity, which is then counted by an electronic counter, and finally the measurement result is displayed directly as numbers on the display screen. The functions of measuring voltage, current, and resistance in a multimeter are realized through the conversion circuit part, while the measurement of current and resistance is based on voltage measurement. In other words, a digital multimeter is expanded from a digital DC voltmeter. The digital DC voltmeter's A/D converter transforms continuously changing analog voltage quantities over time into digital quantities, which are then counted by an electronic counter to obtain the measurement result, and the decoding display circuit displays the result. The logic control circuit coordinates the work of the circuits, completing the entire measurement process in sequence under the action of the clock.

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