Microwave rod antenna is stimulated by an electromagnetic pulse transmitter and sends very short pulses to a target. They reflect from a target and then they are received by the same antenna.
Microwave Level Devices
The electrical signal from the antenna is amplified and processed. Distance to an object is calculated and converted to 4mA to 20mA and also optionally, level information is sent to a PC via RS232 or RS485 for diagnostic data logging and programmable set-up.