Filter Change Indicator with With Auxiliary Filter Trap for Acids Gases & Vapors

(Acids BTI AFT, PN: 651) 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 Acids Gases & Vapors. The indicator is equipped with auxiliary filter trap to ensure no acid gases or 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