Filter Change Indicator with With Auxiliary Filter Trap for Nitrogen Dioxide, Chemteq, Mfr#: 669

Gas (Nitrogen Dioxide BTI AFT, PN: 669) is qualitative (yes/no) colorimetric indicator for the saturation and end-of-service life of carbon absorbers. It is designed to provide real-time indication of the breakthrough of Nitrogen Dioxide. The indicator is equipped with auxiliary filter trap to ensure no Nitrogen Dioxide escape to the outside environment while the indicator changing color. Dimensions: Breakthrough indicator (Part A): 89.9mm (3.5in), diameter 24.5mm (1.0in). Auxiliary filter trap (Part B): 41mm (1.6in), diameter 81mm (3.2in). Inlet dimensions: 3/4" MNPT