itz informationstechno electrical components German itz informationstechno models itz informationstechno prices

itz informationstechno 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 widely used due to their many advantages, including simple structure, ease of manufacturing, wide measurement range, high accuracy, low inertia, and output signals suitable for long-distance transmission. Additionally, since thermocouples are passive sensors that do not require an external power supply during measurement, they are very convenient to use and are often employed to measure the temperature of gases or liquids inside furnaces and pipelines, as well as the surface temperature of solids.

itz informationstechno electrical component characteristics

Dynamic characteristics refer to the output behavior of a sensor when the input changes. In practical applications, the dynamic characteristics of a sensor are often expressed by its response to certain standard input signals. This is because the sensor's response to standard input signals can be easily determined through experimental methods, and there is a certain relationship between its response to standard input signals and its response to arbitrary input signals; knowing the former often allows inference of the latter. The most commonly used standard input signals are step signals and sinusoidal signals, so the dynamic characteristics of sensors are also frequently represented by step response and frequency response.

itz informationstechno electrical component features

Mercury switches achieve switching on and off based on the movement of mercury enclosed within a glass or metal housing. Therefore, compared with mechanical switches, mercury switches have many features: (1) Can be used in harsh environmental conditions. Since mercury switches are sealed, the internal mercury is isolated from the outside environment, allowing them to be used in environments with oil, steam, dust, and corrosive gases. (2) Requires small external force for switching. Mercury is the only metal that remains liquid at room temperature; it has high surface tension and specific gravity. A slight external force causing the mercury switch to tilt will move the mercury, thereby achieving switching. (3) Mercury has good electrical conductivity, and the contact resistance between the electrodes of a mercury switch is generally very low. (4) The current allowed through a mercury switch depends on the electrode material. (5) Since the switching of a mercury switch is determined by the gravity of the mercury, it can operate reliably over long periods. (6) The electrode contacts are liquid-to-liquid, producing no noise. (7) Since mercury can flow, the mercury switch can turn on or off as long as the acceleration exceeds a set value, making it suitable for use as a vibration-sensitive element. (8) Small size, diverse forms, and fully sealed construction. (9) Simple structure and low cost. (10) High quality and excellent products, suitable for beginners.

itz informationstechno electrical component applications

Thermistors can also be used as electronic circuit components for temperature compensation in instrument circuits and cold-junction temperature compensation for thermocouples. Utilizing the self-heating characteristic of NTC thermistors enables automatic gain control, forming RC oscillator amplitude-stabilization circuits, delay circuits, and protection circuits. When the self-heating temperature is much higher than the ambient temperature, the resistance is also related to the heat dissipation conditions of the environment. Therefore, this characteristic of thermistors is often utilized in anemometers, flow meters, gas analyzers, and thermal conductivity analysis to create specialized detection elements. PTC Thermistors are mainly used for overheat protection of electrical equipment, contactless relays, constant temperature control, automatic gain control, motor starting, time delay, automatic degaussing in color televisions, fire alarms, and temperature compensation. Main disadvantages: (1) The relationship between resistance and temperature is highly nonlinear; (2) Poor consistency and interchangeability among components; (3) Components are prone to aging and have relatively poor stability; (4) Except for special high-temperature thermistors, most thermistors are only suitable for the range of 0 to 157 °C, which must be noted during use.

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