An open-type automatic nephelometer for atmospheric studies and its applications

An intelligent nephelometer of the open type designed for in situ studies of the atmosphere is described. The nephelometer operates in the near IR wavelength range. The construction and the concept of the device allow it either to work independently during several hours or to be operated remotely at a distance up to 500 m from the central host computer. This nephelometer is a new class of intelligent instruments intended for long-term application in open air and allowing the receipt of qualitative and quantitative information about the scattering coefficient in situ.