Nobody carries more thermocouple selector switches than Omega. Our rotary switches are available in a range of different models and in 3-inch, 5-inch, and ? DIN sizes. Choose from gold- or silver-plated contacts, make before break or break before make contact actions, and with as many as 40 different positions. All selector switches come with wire connecting screws included. If your application requires isothermal, low-resistance switching of temperature measurement circuits then get the switches you need from Omega and enjoy the highest level of performance for less.