The five general categories of sensory receptors in animals:
These receptors allow us to detect touch. We can also monitor the position of our joints, muscles and bones with mechanoreceptors. A Pacinian corpuscle is an example of this, which allows us to detect pressure in our skin. Mechanoreceptors are mostly found in the skin (cutaneous), but others also exist, such as in hair cells.
These sensory receptors detect changes in temperature. For example, when we put our hand into hot water, or the shower is too cold. Other examples of where these receptors would come in handy would be in knowing when it is too cold outside without a jacket.
These receptors detect pain. Somatic (skin and deep tissues) and visceral pain receptors are located throughout the body, and send signals for pain to the central nervous system until the pain has stopped.
4. Electromagnetic receptors
These sensors detect electric currents. (electromagnetic waves)
These receptors respond to taste (taste buds) or smell (Olfactory cells) or other chemical stimuli. There are also chemoreceptors in the body which help the brain maintain homeostasis by measuring concentration of certain chemicals in the body.