Pressure Detector Functions:

While the pressures which are monitored vary slightly depending on the details of facility design, all pressure detectors are used to give up to three basic functions: alarm, indication, and control. Because the fluid system might operate at saturation and subcooled both conditions, accurate pressure indication has to be available to maintain proper cooling. A few pressure detectors have audible and visual alarms related along with them when specified preset limits are exceeded. A few pressure detector applications are used as inputs to protective characteristic and control functions.