Ruskin’s AMP series probes are designed to provide accurate flow monitoring at all times. The anodized aluminum step sensor is fastened to a 20 gage galvanized steel mounting plate. Brass fittings are used to connect the high and low pressure chambers of the step sensor to a high performance glass on silicone pressure transducer through 1/4″ (6) O.D. polyethylene tubing. All performance data is based on three duct areas and AMCA 610 figures one and two, providing the most comprehensive testing in the industry.