D-FL 220T
Ultrasonic flow velocity monitor
Measuring system for continuous evaluation of flow velocity and flow direction in tunnels.
Ultrasonic sensors for tunnel ventilation control system. Reliable measurement across the tunnel profile.
Two identical sensors alternately transmit and receive ultrasonic pulses. The system evaluates the transition times dependant on direction and calculates flow speed. D-FL 220T requires extremely low maintenance.
- Stand-alone system, no control unit required
- Simple configuration
- Corrosion resistant against aggressive tunnel atmosphere
- Sensors can be replaced quickly, no tools, no re-alignment required
- Signal transmission
- per 4-20mA analog signal and 2 relays
- per RS 485 bus via MODBUS RTU protocol
- Minimized spare requirements
- Extremely low maintenance
