Features:
- Precise ultrasonic air flow measuring system based on different transition times of ultrasonic pulses
- Measurement of average airflow over the whole tunnel cross section
- Sensor setup via service interface
- Suitable for tunnel cross sections up to 18m (Measuring path up to 25m)
- Connection to tunnel control system either via analogue output and relays or via RS-485 MODBUS RTU
- Visible LEDs to indicate sensor status
- Optional, remote touch operation unit to display measured values and to modify parameters
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