Optical Scientific Inc. (OSi) products

OSi`s patented Wind Speed and Smoke Sensor (WSS) makes drift free air flow measurements across the tunnel, calculates true average wind speed, and detects smoke. The WSS-300-DS model is equipped with Automatic Gain Control (AGC) to compensate for variations in opacity caused by particulate matter, smoke, or moisture suspended in tunnel. The WSS-300-DS uses OSi patented optical scintillation technology. The optical scintillation technique relies on advanced Digital Signal Processing (DSP) electronics to "see" and measure the movement of turbulence found in a tunnel air flow and provides highly accurate, path-averaged wind speed measurements.