Tunnel sensors
- Early and reliable fire detection in tunnels
- Measurement principles: Scattered light forward
- Perfect addition to temperature cables thanks to earlier and faster detection
- No need for protective measures during tunnel cleaning
- Immune to gantry fog
- Visibility (K value) measured according to the scattered light measurement principle
- IP 6K9K enclosure rating thanks to a rugged stainless-steel housing
- For the control of ventilation and for filter monitoring in road tunnels
- Measured values: Visibility (K-value), NO, NO2, NOx, CO, temperature
- Measurement principles: Differential optical absorption spectroscopy (DOAS), transmittance measurement, electrochemical cell, Resistance thermometer
- Measuring distance: 10 m
- Low maintenance requirements due to long maintenance interval (approx. 1 year)
Tunnel sensors
- The tunnel flow velocity measuring device for long-term operation
- Measurement principle: Ultrasonic transit time difference measurement
- Representative measurement across total tunnel width
- Very reliable measurement, compared with punctual measurement methods
- Accurate measurement even of very low flow velocities
- Extremely rugged components made of titanium, stainless steel, or die cast
