FAQ: "We have a Hunters Associate D25 M Optical Sensor DP-9000 / S.N. 91096. We do not use this machine and were inquiring to ensure there were not any regulatory disposal precautions we should take. Is there any potential hazardous waste used inside the machine."
HunterLab sensors are electro-optical instrument designed to measure color.
They would be disposed of in the same manner that you would dispose of a personal computer. It is not considered hazardous.