D-FL 220T Tunnel flow meter

D-FL 220T Tunnel flow meter

D-FL 220T Ultrasonic flow velocity monitor 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.

Features:

• Reliable measurement across the tunnel profile
• No separate control unit required
• Easy configuration
• Corrosion resistant
• Sensors can be exchanged very quickly – no tools required – no re-alignment required
• Signal transmission by analogoue signal/ relay or by RS 485 MODBUS RTU
• Reduced spare requirements
• Immune against ambient noise
• Extremely low maintenance requirements

Applications:

• Suitable for flow measurement in road tunnels / railway tunnels.
• Provides signals for ventilation control system to monitor the air flow speed and to allow control of flow speed in case of fire.