Panasonic ex l200 series ultra compact laser sensors built in amplifier panasonic ex l221 p a spot reflective minute object detection type laser sensor with a spot size of oslash1mm that can detect gold wire down to 001mm this incredibly small high precision laser sensor has a built in amplifier and has the directivity and visibility performance only achievable by a laser device the sensor uses a red class 1 laser that is safe to use and does not require isolated areas of laser usage th