The 4156K and 4166K Series Wizard II temperature controllers provide rugged and economical solutions to temperature control in many applications, particularly in the chemical and oil production industries. These pneumatic instruments are available for proportional-only, proportional-plus-reset, and differential gap control. They measure process temperature with a gas-filled temperature bulb immersed in the process fluid and compare this temperature to an operator-adjusted set point. The controller then delivers a pneumatic signal to a control element that maintains the process temperature at or near the set point.

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