TunnelTech 801 air flow sensor that combines the reliability of ultrasonic technology and delivers superb accuracy and reliability.

TunnelTech 801 - Cross Tunnel Flow Monitor

The TunnelTech 801 Air Flow Monitor (AFM) is CODEL's industry proven tunnel air flow monitor.

The TunnelTech 801 has been specifically designed for road, rail and civil tunnel and ventilation shaft applications and represents the latest in compact ultrasonic sensor-head design. Ultrasonic time-of-flight measurement across any tunnel delivers a highly accurate airflow value and virtually eliminates traditional high-maintenance measurement techniques.

The TunnelTech 801 provides real-time accurate measurements of air velocity and volumetric airflow under demanding environmental conditions. Unlike other measurement devices, the sensor is not affected by temperature, humidity or dust.

• Dual sensor, non-contact ultrasonic transit time measurement technology.
• No moving components providing maintenance free operation.
• Ultrasonic time-of-flight measurement across any tunnel.
• Real-time accurate measurements of air velocity and volumetric airflow.
• Signal output by analogue/relay or RS 485 MODBUS.
• Extremely low maintenance requirements.

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