User manual VAISALA PWD52 DATASHEET

[. . . ] www. vaisala. com Vaisala Present Weather Detector PWD52 Automated observation networks need to operate with maximum reliability. [. . . ] This weather-proof design helps sustain accurate measurement results. The optional hood heaters prevent the buildup of ice and/or snow in the optical path. Solid Track Record Thousands of PWD series sensors have been installed all around the world. They have undergone rigorous test programs. In the field, PWD sensors have demonstrated very low failure rates. They have proved their robustness in the harshest climates and most demanding conditions, ranging from offshore to desert and from airport to roadside. Robust and Dependable Three measurement methods are used in the PWD52 continuously, independently, and simultaneously thus reducing false alarm rates to a minimum. The identification of precipitation type is reliable due to sophisticated algorithmic processing of complementary data from multiple sources. These factors together produce exceptionally dependable data. The downward-facing sensor hoods protect the optical surfaces from contamination, resulting in low maintenance needs and costs. Technical Data Visibility measurement Operating principle Measurement range (MOR) Accuracy Forward scatter measurement 10 . . . 35 km Environmental Operating temperature Operating humidity Protection class -40 . . . [. . . ] All specifications -- technical included -- are subject to change without notice. [. . . ]