DDC Online direct digital controls
Guide to DDC

Chapter 2

Input Devices and Sensors

Position Measurements

Position sensors and transmitters are used in HVAC system controls where the feedback of position is necessary for precise control of system components, such as valves and dampers, or where monitoring of position is necessary or desired. Position transmitters commonly operate using a slidewire or rotary potentiometer to provide a variable resistance that changes with linear or rotary position.

Getting Started | Chapter 2: Occupancy | Top | Chapter 2: Gas Concentration