Precision Contact Sensors: Firstly the definition of precision varies from industry to industry. Among the main design concepts are accuracy, resolution and repeatability. Accuracy is also known as linearity, or absolute error. It refers to the maximum deviation of a sensor's measured value from the theoretical true value. Resolution refers to the minimum amount of displacement change required for the sensor to be able to produce a change in output. Repeatability refers to the amount of change between measured values when the sensor repeatedly measures the same position. High-end precision capacitive displacement sensors are accurate down to the nanometre level. Resolution will be smaller, repeatability depends largely on whether the sensor has a good temperature compensation function and the stability of the environment. Capacitive sensors in the international high-end brands are Germany M iridium and the United States MTI, of course, the price will be relatively high. If the real need for ultra-high performance in the field, such as precision parts measurement, precision mechanism of movement (such as lithography positioning), or to use high-end sensors.