Sulfur Dioxide Filter Breakthrough Indicator

Sulfur Dioxide filter change indicator. It is a colorimetric indicator that indicates the exhaustion of filters. The indicator is reliable and cost effect means for protection from exposure to toxic sulfur dioxide. It changes color from orange to red when filter is saturated with sulfur dioxide. Hence alerting the user to replace the exhausted filter.

Connects easily to the ¾ inch female NPT outlet of the filter using the ¾ inch male NPT threading at the bottom of the indicator. Bright vibrant color change from all directions. Unique design prevents any color change due to exposure to contaminates in the surrounding environment. It changes color only when filter is saturated.