Hydrogen sulfide WP Saturation Indicator Sticker for Ductless Hood Filters

Odor Control • Filter replacement indicator

Item No. 1530000

Product Features
Minimum detectable limit: 1ppm•hr
Color Change: Green to black
Dimensions: 2.8mm (0.11in), diameter: 31.8mm (1.25in)
Service life: 2 Years

Sold in packs of 5

Hydrogen sulfide waterproof (WP) Breakthrough Indicator is qualitative (yes/no) colorimetric indicator of the end-of-service life of ductless hood filters. It is designed to provide real-time indication of the saturation and breakthrough of hydrogen sulfide. It operates at temperatures 4oC to 32oC (39oF to 89.6oF) and humidities 5% RH to 85%RH. The indicator is 0.12” thick and 1.25” diameter. The unique design of the indicator prevents any color change due to exposure to contaminants in the surrounding environment and changes color only when filter is saturated. The indicator has extended service life of 2 years plus 2 years shelf life. Water has no effect on the indicator.

Product Specifications


Weight:0.4g (0.02oz)


Dimensions:2.8mm (0.11in), diameter: 31.8mm (1.25in)


Operating temperature:-20oC to 65oC (-4oF to 149oF)


Operating humidity:5% RH to 85%RH


Minimum detectable limit:1ppm•hr at 30 cm/s face velocity


Color change:Green to black


Storage temperature:4oC to 25oC, (39oF to 77oF)


Shelf life:2 years at 4oC to 25oC, (39oF to 77oF)


Service life:2 years
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