Filter Change Indicator with With Auxiliary Filter Trap for Mercaptans Gases & Vapors, Chemteq, Mfr#: 673

(Mercaptans BTI AFT, PN: 673) 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 mercaptans gases & vapors. The indicator is equipped with auxiliary filter trap to ensure no mercaptans gases & vapors 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