Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low View: 12 24 All Quick View Quick View SMART/AQM – AIR QUALITY MONITORIoT-enabled visibility and gas sensor for use in tunnels. The visibility measurement is based on the scattered light principle, the gas measurement is performed with up to 3 electrochemical cells. Quick View Quick View SMART/ECS – GAS SENSORIoT-enabled gas sensor for electrochemical measurement of gas concentration with up to four gas sensors modules. Specifically designed for application in tunnels. Quick View Quick View T/FL-DP – AIR FLOW MONITORING SYSTEMRobust air flow monitoring system based on high-precision differential pressure measurement. Specifically designed for tunnels. Quick View Quick View T/FL-US – AIR FLOW MONITORING SYSTEMAccurate ultrasonic air flow measuring system based on different transition times of ultrasonic pulses. Reliably measures the average air flow over the whole tunnel cross section. Quick View Quick View T/LUMPhotometer to measure the luminance in the access zone, threshold zone and interior zone of tunnels. Includes a zoom lens to adjust the focus areas. Quick View Quick View T/VIS-TR – VISIBILTY MONITORING SYSTEMVisibility measuring system according to the transmission principle, specially developed for the requirements in tunnels. The measuring range for the analog signal is freely assignable.