In general, more accurate and stable measurements can be obtained by increasing the optical path length between the receptor and the light receiving element (CMOS), but this also increases the sensor depth and the sensor body gets bigger. Panasonic laser displacement sensors need speed, accuracy and the capability to provide excellent performance in any application. Displacement sensors measure the distance an object moves and they can also be used to measure object height and width. There are 2 types of displacement sensors: Contact types, utilizing a dial gage, differential transformer, etc., and non-contact types, utilizing a magnetic field, laser beam, ultra-sonic wave, etc.