LSI DPA311 Visibility and Present Weather Sensor

DPA311.1 visibility sensors with a measuring range up to 2 km are designed to detect fog and haze on roads and in tunnels. DPA305 with both digital and analogue outputs as well as relays for switching external equipment; it can be integrated into Intelligent Transport Systems and used for automatically switching warning signs in changing visibility conditions. Both DPA305/311.1 analyses water particles of different forms in the air as fog, rain or snow or mix form. It can measure visibility, type of precipitation including its intensity and accumulation. DPA312 represents a low cost solution to measure visibility in a range up to 7,5 m.