Its VISIC100SF tunnel environment monitor combines visibility measurements, with a range of up to 15km, CO detection of 0- 300ppm (≤3% accuracy) and NO detection of 0-100ppm (≤3% accuracy). The device responds rapidly to changing conditions (60 seconds or less), enabling operators to take appropriate action. According to Sick, it is the only sensor to combine scattered light measurement with electrochemical cell sensing in a compact stainless steel housing.
The sensor has an environmental protection rating of IP69K and so is able to withstand harsh tunnel conditions including tunnel washing procedures and is said to be easy to set up.