robbe electrical components Germany robbe model robbe price

robbe electrical component is a sensor resistor whose resistance value changes with temperature. According to different temperature coefficients, it is divided into positive temperature coefficient thermistors and negative temperature coefficient thermistors. The resistance value of a positive temperature coefficient thermistor increases as the temperature rises, while the resistance value of a negative temperature coefficient thermistor decreases as the temperature rises; both belong to semiconductor devices.

robbe electrical component characteristics

The so-called dynamic characteristic refers to the output characteristic of the sensor when the input changes. In practical work, the dynamic characteristic of a sensor is commonly expressed by its response to certain standard input signals. This is because the sensor's response to standard input signals is easy to obtain through experimental methods, and there is a certain relationship between its response to standard input signals and its response to any input signal; often, knowing the former allows one to deduce the latter. The most commonly used standard input signals are step signals and sinusoidal signals, so the dynamic characteristics of sensors are also commonly expressed by step response and frequency response.

robbe electrical component classification

1, classified by operating nature, can be divided into transmitting antennas and receiving antennas. 2, classified by purpose, can be divided into communication antennas, broadcast antennas, television antennas, radar antennas, etc. 3, classified by directionality, can be divided into omnidirectional antennas and directional antennas, etc. 4, classified by operating wavelength, can be divided into ultra-long wave antennas, long wave antennas, medium wave antennas, short wave antennas, ultra-short wave antennas, microwave antennas, etc. 5, classified by structural form and operating principle, can be divided into wire antennas and aperture antennas, etc. Characteristic parameters describing antennas include radiation pattern, directivity coefficient, gain, input impedance, radiation efficiency, polarization, and bandwidth. 6, classified by dimension, can be divided into two types: (1) One-dimensional antennas consist of many wires, which are either straight lines like those used in mobile phones, or some clever shapes, like the old rabbit ears used on televisions before the advent of cable TV. Monopole and dipole antennas are the two most basic one-dimensional antennas. (2) Two-dimensional antennas: diverse in form, including patch (a square piece of metal), array (a bundle of patches organized in a two-dimensional pattern), horn, and dish. 18, antennas can be divided into three major categories according to different usage scenarios: handheld transceiver antennas, vehicle-mounted antennas, and base station antennas. Handheld transceiver antenna: an antenna for personal use with handheld walkie-talkies, commonly available in rubber antennas and telescopic antennas. Vehicle-mounted antenna: refers to communication antennas originally designed for installation on vehicles, with suction cup antennas being the most common and widely applied. Vehicle-mounted antennas also come in forms such as shortened type, quarter-wavelength, center-loaded type, five-eighths wavelength, and double half-wavelength. Base station antenna: plays a very critical role in the entire communication system, especially for communication stations serving as communication hubs. Commonly used base station antennas include fiberglass high-gain antennas, four-ring array antennas (eight-ring array antennas), and directional ant

robbe electrical component features

Features self-diagnostic stable operating zone indication function, which can promptly inform whether the working status is reliable; through-beam, retro-reflective, and mirror-reflective photoelectric switches all have anti-interference functions, making installation convenient; setting the control terminal allows pre-checking whether the photoelectric switch works normally before operation. It can also accept interrupt or detection commands from computers or programmable logic controllers at any time; appropriate combination of external diagnosis and self-diagnosis can intelligentize the photoelectric switch; fast response speed, capable of detecting tiny objects moving at high speed; adopts specialized integrated circuits and advanced surface mount technology, offering high reliability; small size, light weight, simple installation and debugging, and includes short-circuit protection function.

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