The WP (Hydrogen Sulfide BTI 2 WP Refill Kit, PN: 419-5000) is a kit to replace the consumed components of the Nitrogen Dioxide BTI2. It consists of one Nitrogen Dioxide Colorimetric Indicator Assembly (PN: 419-1600), three Cotter Pins (1/16” x 1/2”) (PN: 436-1300), two Porous Plugs (PN: 401-1400) and one Sorption media (PN: 419-5200)
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