What are the common types of pressure transmitters?

Common types include: Differential pressure (DP) - measures difference between two pressures, used for flow, level, and filter dP; Gauge pressure - measures relative to atmospheric, most common for process pressure; Absolute pressure - measures relative to perfect vacuum, needed for vapor pressure applications; Capacitance type - measures deflection of diaphragm, very common; Strain gauge - piezoresistive element changes resistance with pressure. Range selection important - typically 3-5x normal operating pressure for gauge, appropriate differential range for DP applications.