McNab is a designer and manufacturer of quality control instrumentation for the food and beverage industry. They specialize in optical applications such as absorption, brewing process systems, yeast blending, and laboratory equipment. McNab's instruments provide real-time measurement of absorption, clarity, color, concentration, and particle counting, ensuring product uniformity and quality. Their turbidity instrumentation allows for across-the-pipe measurement without sampling, enhancing process control and cost savings. McNab's expertise lies in developing digital analyzers and laboratory equipment for accurate monitoring and quality assurance in food and beverage production.