The Check Air Color Comparator is a handheld accessory used with colorimetric badges to quantify exposure to toxic phosgene gas by matching the badge's color change to a corresponding color wheel, providing a dose reading (ppm·min) without lab analysis, ideal for personnel or area monitoring where instant, visual indication of hazardous levels is needed. These may be used for personnel or area monitoring for exposure times from 1 minutes to 3 days.

1. Badge Exposure: A SafeAir/ChromAir PFIB badge is worn or placed in an area. It changes color upon exposure to PFIB.
2. Comparator Use: The exposed badge is inserted into the comparator device, which features a rotating wheel with different color standards.
3. Color Matching: You turn the wheel until the color on the badge matches a color on the comparator.
4. Dose Reading: The exposure dose (e.g., from 0.5 to 450 ppm·min) is then read from a window on the comparator. 

• Dose Measurement: Quantifies exposure levels (ppm·min) for a more precise reading than the badge alone.
• No Lab Needed: Offers immediate, on-site results.
• Versatile: Used for personnel safety (badges clip to clothing) or area monitoring.