Transmitters

Transmitters are electronic devices used in heating, ventilation, and air conditioning systems to measure environmental or system variables and transmit signals (usually analog or digital) to controllers, building automation systems (BAS), or monitoring devices.

They convert physical conditions—like temperature, humidity, pressure, or airflow—into standardized electrical signals (e.g., 4–20 mA, 0–10 V, or digital protocols like BACnet or Modbus).