Each control displays the set-point and process temperature. In addition the control has a high limit alarm setpoint that once set will turn off the power to that position if an alarm condition occurs. Manual reset is then required once temperature drops below the alarm condition. The control is furnished with 3 thermocouples for insertion in the flask or thermowell. If you already have a 3-positon combo mantle, this control will work and give you all the additional safety required for your process. The combo mantle sits on top of the control with locator cups to alignment.