Rotary Thermocouple Selector Switches
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- 3", 5" and 1/4 DIN Sizes
- Gold or Silver Plated Contacts
- 2 or 3 Poles in 76 mm (3") and 127 mm (5") sizes
- 2, 3, or 4 Poles in 1/4 DIN Size
- 2 to 34 Positions
- Wire Connecting Screws Included
OSWG3-8 Model OptionsView all models
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The isothermal design of these rotary switches minimizes temperature gradients between the input and output thermocouple wiring. This in turn minimizes errors in transmitting thermocouple signals due to the generation of a thermal emf at the wire junctions. The low resistance of the silver or gold plated contacts also enables switching of temperature sensitive resistance devices, such as RTDs and thermistors.
Two pole SW and OSW series switches have a convenient . off. position. The . off. position may be left as an open circuit or shorted to keep spurious signals from registering on thermocouple instruments.Each pole is fully isolated. For quick and easy wiring, the terminals located at the rear of the switch are clearly marked.
OMEGA is pleased to offer a rotary selector switches in a 1/4 DIN size. Like our other rotary selector switches, this model is available with Break Before Make and Make Before Break contact action. Models are available with 2 to 34 positions in 2, 3 or 4 pole versions. The 1/4 DIN switch also has . jab-in. style connections.