HVAC engineers

Pressure Switches and Pressure Transmitters two common devices used in process control and automation.  thought this comparison would be useful, especially for those working with DCS/PLC systems or new to instrumentation. Pressure Switch 1. Works like a simple ON/OFF switch. 2. Provides a digital signal (either ON or OFF). 3. Activates or deactivates an electrical contact when the pressure crosses a pre-set limit. 4. Used for basic control applications (e.g., turning pumps or compressors ON/OFF). 5. Suitable where only a threshold action is required, not continuous monitoring. Pressure Transmitter 1. A more advanced pressure-measuring device. 2. Continuously measures the actual pressure value. 3. Provides a continuous analog output signal (typically 4-20 mA or 0-10 V). 4. Used in process control systems like DCS, PLC, or SCADA. 5. Essential for applications needing accurate, real-time pressure data. In Short Pressure Switch Only indicates if pressure is too high or too low (ON/OFF)...