103016753 in stock. German 103016753 electrical components. 103016753 inventory.

103016753 electrical components refer to electronic components that can open a circuit, interrupt current flow, or direct it to another circuit. The most common switches are manually operated electromechanical devices with one or more electrical contacts. "Closed" contacts indicate that the electrical contact is conductive, allowing current to flow; "open" switch status indicates that the electrical contact is non-conductive, forming an open circuit and preventing current flow. The simplest switch consists of two metal pieces called "contacts." When the two contacts touch, they complete the current loop; when they do not touch, the current path is open. When selecting contact metals, their corrosion resistance must be considered, as most metals form insulating oxides after oxidation, preventing normal contact operation. Selection of contact metals must also consider factors such as electrical conductivity, hardness, mechanical strength, cost, and toxicity. Contacts are sometimes plated with corrosion-resistant metals. Plating is generally applied to the contact surface to prevent performance degradation due to oxides. Sometimes non-metallic conductive materials, such as conductive plastics, are used for contact surfaces. In addition to contacts, switches contain movable parts that make or break the connection. Switches can be classified by their movable parts into lever switches, push-button switches, rocker switches, etc., and the movable parts can also be other types of mechanical linkages.

103016753 electrical component principles

Potentiometric displacement sensors convert mechanical displacement into resistance or voltage output with a linear or arbitrary functional relationship via potentiometer elements. Standard linear and rotary potentiometers can be used as linear displacement and angular displacement sensors, respectively. However, potentiometers designed for displacement measurement require a defined relationship between displacement change and resistance change. The movable wiper of a potentiometric displacement sensor is connected to the measured object. Displacement of the object causes a resistance change at the potentiometer's moving terminal. The magnitude of the resistance change reflects the displacement value, while an increase or decrease in resistance indicates the direction of displacement. A supply voltage is usually applied to the potentiometer to convert the resistance change into a voltage output. In wire-wound potentiometers, resistance changes in steps corresponding to the winding resistance as the wiper moves, resulting in a stepped output characteristic. If such a displacement sensor is used as a displacement feedback element in a servo system, excessive step voltages can cause system oscillation. Therefore, the resistance per turn should be minimized during potentiometer manufacturing. Another major disadvantage of potentiometric sensors is susceptibility to wear. Their advantages include simple structure, large output signal, ease of use, and low cost.

103016753 electrical component functions

(1) Sensor functions are often compared to the 5 major human sensory organs: photosensitive sensors for vision, acoustic sensors for hearing, gas-sensitive sensors for smell, chemical sensors for taste, and pressure-, temperature-, and fluid-sensitive sensors for touch. (2) Classification of sensitive elements: Physical type, based on physical effects such as force, heat, light, electricity, magnetism, and sound. Chemical type, based on the principles of chemical reactions. Biological type, based on molecular recognition functions such as enzymes, antibodies, and hormones. Typically, they are divided into ten major categories based on their basic sensing functions: thermal-sensitive elements, photosensitive elements, gas-sensitive elements, force-sensitive elements, magnetic-sensitive elements, humidity-sensitive elements, acoustic-sensitive elements, radiation-sensitive elements, color-sensitive elements, and taste-sensitive elements (some have previously classified sensitive elements into 50 categories).

103016753 electrical component classification

Thermosensitive materials are generally classified into three categories: semiconductors, metals, and alloys: 1. Semiconductor thermistor materials include single-crystal semiconductors, polycrystalline semiconductors, glass semiconductors, organic semiconductors, and metal oxides. They all exhibit very high temperature coefficients of resistance and high resistivity, resulting in high sensitivity for sensors made from them. Based on the temperature coefficient of resistance, they can also be divided into negative temperature coefficient (NTC) materials and positive temperature coefficient (PTC) materials. For example, barium titanate ceramic is an ideal PTC semiconductor material. Both types of materials are widely used in temperature measurement, temperature control, temperature compensation, switching circuits, overload protection, and time delay applications, such as in the manufacture of thermistor thermometers, thermistor switches, and thermistor delay relays. Due to the exponential relationship between resistance and temperature, these materials have a narrow temperature measurement range and poor uniformity. 2. Metal thermistor materials are widely used as resistance temperature detectors (RTDs), current limiters, and automatic constant-temperature heating elements. Examples include platinum resistance thermometers, nickel resistance thermometers, and copper resistance thermometers. Among these, platinum temperature sensors exhibit high precision and high stability in various media, including corrosive media. However, the scarcity and high cost of platinum limit their widespread application. Copper temperature sensors are less expensive, but long-term use in corrosive media can lead to significant changes in static characteristics and resistance values. Nickel temperature sensors are widely used abroad and are considered ideal materials due to their high sensitivity, satisfactory reproducibility, and stability. 3. Alloy thermistor materials, also known as thermistor alloys. These alloys have high resistivity and their resistance values are sensitive to temperature changes, making them good materials for manufacturing temperature-sensitive sensors. Performance requirements for thermistor alloys as temperature-sensitive sensors are as follows: (1) sufficiently high resistivity; (2) relatively high temperature coefficient of resistance; (3) thermal expansion coefficient close to that of the experimental material; (4) low strain sensitivity coefficient; (9) good repeatability of the resistance-temperature curve during heating and cooling within the operating temperature range.

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