There are two common ways of categorising industrial sensors - how they work - what they do ## Temperature ## Photo-Electric ## Induction ## Fibre-Optic ## Mechanical Limit switches and the like from companies like [Omron](https://store.omron.com.au/category/mechanical-sensors-limit-switches) and Telemechanique. Available from Digikey and SoureITDirect ## Accessories ### Reflectors and Reflective Tape ### Mounting Brackets