From low-cost HazMET™ to FAA-certified AWOS-AV and highly configurable MAWOS™ weather systems, Optical Scientific Inc. (OSi) provides automated systems to meet every need. OSi also provides the world’s most advanced optical Present Weather/Visibility/Precipitation sensors for numerous applications, including the new APG-815 Advanced Precipitation Gauge. Whether road weather, airport, helipad, Hydromet or fenceline monitoring, OSi can meet your needs. Our sensors and systems are based on all digital/DSP-based designs that offer extremely high reliability and high accuracy with no need for periodic calibration. OSi has a 35-plus year record of excellent customer service with many satisfied lifetime customers!