HELIOSGROUP electrical components Germany HELIOSGROUP model HELIOSGROUP price

HELIOSGROUP electrical components are electrical control devices. When the change in the input quantity (excitation quantity) meets specified requirements, they cause a predetermined step change in the controlled quantity in the electrical output circuit. They exhibit an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Typically applied in automated control circuits, they effectively function as "automatic switches" that use small currents to control the operation of large currents. Therefore, they serve functions such as automatic regulation, safety protection, and circuit switching in electrical circuits. A relay is an electrical control device that, when provided with a specified input quantity for a sufficient duration, causes a predetermined step change in the controlled quantity in the electrical output circuit. When the input quantity drops to a certain level and remains there for a sufficient duration, it returns to its initial state.

HELIOSGROUP electrical component types

1. A dial thermometer is made from a coiled bimetallic strip. One end of the bimetallic strip is fixed, and the other end is connected to a pointer. Because the two metal strips have different expansion rates, they coil to different degrees at different temperatures, causing the pointer to indicate different positions on the scale. The temperature can be determined from the reading on the scale. 2. The resistance change in semiconductor thermometers differs from that in metals; as temperature rises, their resistance decreases, and the magnitude of change is significant. Therefore, even small temperature changes can cause noticeable resistance changes, resulting in thermometers with high precision, often referred to as thermal sensors. 3. A thermocouple thermometer consists of two different metals connected to a sensitive voltmeter. At different temperatures, the metal junctions generate different potential differences across the ends of the metals. Since the potential difference is very small, a sensitive voltmeter is required for measurement. The temperature can be determined from the voltmeter reading. 4. Optical pyrometer: When an object's temperature is high enough to emit significant visible light, its temperature can be determined by measuring the amount of thermal radiation it emits; this type of thermometer is called an optical pyrometer. This thermometer mainly consists of a telescope equipped with a red filter and a circuit containing a small lamp, a galvanometer, and a variable resistor. Before use, the relationship between the temperature corresponding to different filament brightness levels and the galvanometer reading is established. During use, align the telescope with the object to be measured and adjust the resistor until the lamp's brightness matches that of the object. The temperature of the object can then be read from the galvanometer. 5. Liquid crystal thermometers made with different formulations have different phase-change temperatures. When they undergo a phase change, their optical properties also change, causing the liquid crystal to appear to change color. If liquid crystals with different phase-change temperatures are coated on a sheet of paper, the temperature can be determined by the color change of the liquid crystal. The advantage of this thermometer is easy readability, while the disadvantage is insufficient accuracy. It is commonly used in ornamental fish tanks to indicate water temperature. 11. Digital thermometers use temperature sensors to convert (temperature) into digital signals, which are then displayed in numerical form on a display (such as LCD, seven-segment display, LED matrix, etc.). They can quickly and accurately measure the maximum human body temperature. Compared with traditional mercury thermometers, they offer advantages such as convenient digital reading, short measurement time, high measurement accuracy, memory function, and audible alerts. In particular, digital thermometers do not contain mercury, making them harmless to humans and the surrounding environment, and thus particularly suitable for use in hospitals and homes.

HELIOSGROUP electrical component principles

A NPN type bipolar transistor can be viewed as two diodes joined together with a common anode. In the normal operating state of a bipolar transistor, the base-emitter junction is forward-biased, while the base-collector junction is reverse-biased. Without external voltage, the electron concentration in the N region of the emitter junction is greater than that in the P region, causing some electrons to diffuse into the P region. Similarly, some holes from the P region will diffuse into the N region. Thus, a space charge region forms at the emitter junction, generating an internal electric field directed from the N region to the P region. This field hinders further diffusion, achieving dynamic equilibrium. At this point, if a forward voltage is applied to the emitter junction, the dynamic equilibrium between the carrier diffusion movement and the internal electric field in the depletion layer is broken, injecting thermally excited electrons into the base region. In a NPN type transistor, the base region is P type doped, where holes are the majority carriers; therefore, electrons in this region are called "minority carriers." Electrons injected from the emitter into the base region partly recombine with the majority carrier holes there. On the other hand, due to the low doping level and thin physical dimensions of the base region, and because the collector junction is reverse-biased, most electrons reach the collector region via drift motion, forming the collector current. To minimize recombination of electrons before they reach the collector junction, the base region of the transistor must be made sufficiently thin so that the time required for carrier diffusion is shorter than the lifetime of semiconductor minority carriers. Simultaneously, the base thickness must be much smaller than the electron diffusion length. In modern bipolar transistors, the typical thickness of the base region is a few tenths of a micrometer. It should be noted that although both the collector and emitter are N type doped, their doping levels and physical properties are not identical. Therefore, a bipolar transistor must be distinguished from a configuration of two diodes connected in series in opposite directions.

HELIOSGROUP electrical component characteristics

Resolution refers to the ability of a sensor to detect the smallest change in the measured quantity. That is, if the input quantity changes slowly from a non-zero value, the sensor's output will not change until the input change exceeds a certain value; i.e., the sensor cannot resolve changes in the input below this threshold. Only when the change in the input quantity exceeds the resolution does the output change. Typically, the resolution at various points within the full-scale range of a sensor is not uniform. Therefore, the maximum change in the input quantity within the full scale that causes a step change in the output is commonly used as the metric for resolution. If this metric is expressed as a percentage of the full scale, it is termed resolution. Resolution has a negative correlation with sensor stability.

Weidou Intelligent Technology specializes in selling German HELIOSGROUP connectors, HELIOSGROUP switches, HELIOSGROUP relays, HELIOSGROUP controllers, HELIOSGROUP plugs, HELIOSGROUP sensors, HELIOSGROUP resistors, HELIOSGROUP capacitors, HELIOSGROUP buses, HELIOSGROUP modules, HELIOSGROUP cables, HELIOSGROUP power supplies, HELIOSGROUP interfaces, HELIOSGROUP gateways, HELIOSGROUP circuit breakers, HELIOSGROUP original imports from Germany. We welcome inquiries and orders from users.