Process Level Control

1. A level transmitter (LT), a level controller (LC), and a control valve (LV) are used to control the liquid level in a process tank.
2. The purpose is to maintain the liquid level at some prescribed height (H) above the bottom of the tank.It is assumed that the rate of flow into the tank is random.
3. the level transmitter is a device that measures the fluid level in the tank and converts it into a useful measurement signal, which is sent to a level controller.
4. The level controller evaluates the measurement, compares it wiyh a desired set point (SP), and produces a series of corrective action that are sent to the control valve.
5. The valve controls the flow of fluid in the outlet pipe to maintain a level in the tank.

process temperature control