Takistusandurid

Takistusandurid, also known as resistive sensors, are devices that change their electrical resistance in response to a change in a physical quantity. This physical quantity can be a wide range of parameters such as temperature, pressure, light, strain, or humidity. The core principle of operation relies on the inherent relationship between material properties and electrical resistance.

One common type of takistusandur is the thermistor, which is a resistor whose resistance is highly dependent on temperature. Thermistors are widely used in temperature measurement and control systems. Another significant category includes strain gauges, where deformation of a material causes a change in its resistance, allowing for the measurement of mechanical stress and strain.

Photoresistors, or light-dependent resistors (LDRs), exhibit a change in resistance when exposed to light. Their resistance typically decreases as the intensity of incident light increases. Humidity sensors can also operate on resistive principles, where the absorption of moisture by a material alters its electrical resistance.

The conversion of a physical change into a resistance change makes takistusandurid versatile components in various applications. They are found in everyday electronics, industrial control systems, automotive applications, and scientific instrumentation. The simplicity of their operation and relatively low cost contribute to their widespread adoption. The output signal from a takistusandur is typically processed by electronic circuits to provide a usable measurement or control signal.