Rotary switches are used for selecting several thermocouple readings while using only one instrument. All switches are double pole and enclosed. The Terminal Screws are silver and the contacts are gold.  

Catalog Number	Selection Positions	Number of Decks	Number of Thermocouples Switched	Switch
SWR02-07	7	2	One switched at a time
SWR02-11	11	2	One switched at a time
SWR02-15	15	2	One switched at a time
SWR04-7	7	4	One switched at a time
SWR04-11	11	4	One switched at a time
SWR04-15	15	4	One switched at a time