Hydrogen Sulfide BTI (Breakthrough Indicator) (Size 3.5” x 1”, ¾” male NPT)

The Hydrogen Sulfide Gas Breakthrough indicator for Activated Carbon Adsorbers and Filters is a colorimetric indicator that indicates the saturation and exhaustion of carbon adsorbers and filters. The indicator is reliable and cost effect means for protection from exposure to toxic hydrogen sulfide gas in the work place. The indicator change color from light blue to brown to black when carbon absorber or filter is saturated with Hydrogen sulfide.