Optical Scientific Inc. (OSi) is the leader in weather & environmental sensors. Our innovative optical technology has a wide variety of applications. From road weather to flow monitoring in smokestacks. Customers can rely on our instruments 24 hours a day, 365 days a year. We serve an international community of users on all seven continents. You will find OSi products in such diverse locations as the South Pacific and Antarctica. Our clients include multinational corporations, universities, all branches of the military, Federal government agencies, and small local governments.