Profile: Index Sensors & Controls deals with the bi-metal thermal switches. Our product line includes heavy duty pressure switches, heavy-duty temperature switches, electronic temperature switches and APAds. Our heavy duty pressure switches are vibration resistance and with special time delay & diagnostic features. These pressure switches are used for a wide range of heavy vehicle and equipment applications. Our heavy-duty temperature switches are easy to operate in variety of fluids. They are easy to check and has both single and dual function control mode.