Phosgene SafeAir Color Comparator (383016)

The color comparator allows you to pinpoint the exposure dose of the gas when used with the standard badge.

*Does NOT come with the badge. Badge needs to be purchased additionally*

Note: we are not able to ship the badges overseas

Phosgene Information


Color change for Phosgene is from yellow to red.

The SafeAir Phosgene badge may be used for personnel or area monitoring for exposure times from 1 minutes to 3 days. Use with the Phosgene badge for match the dose as in the exposure window.



Phosgene is a colorless, highly toxic gas with an odor resembling moldy hay. It is an insidious poison. There is no immediate irritation even when fatal concentrations are inhaled. It may cause severe pulmonary edema (abnormal fluid build up in the lungs) or pneumonia. Inhalation of high concentrations causes choking, painful breathing and coughing. OSHA PEL (permissible) exposure limit for phosgene is 0.1 ppm (averaged over an 8-hour work shift). NIOSH IDLH (immediately dangerous to life or health) exposure limit for phosgene is 2 ppm.

Phosgene is used in the manufacturing of numerous organic chemicals. It is also used in the production of glass, resins, dyes and plastics.


Principle of Operation

The SafeAir phosgene badge is a monitoring system designed to indicate the presence of phosgene at concentrations below the permissible exposure limit. The SafeAir phosgene badge detects the presence of phosgene by forming a color change in the shape of an exclamation mark inside the triangle. This indication is produced by a color-forming reaction, which occurs when phosgene reacts with a flat indicator layer.

 SafeAir chemical detection badges are a visual indication badge that alerts you with a color changing exclamation mark when there is a specific chemical hazard.

Operating Instructions

1. Remove the pouch from the refrigerator and allow it to warm to room temperature.

2. Remove the badge from its protective pouch.

3. Remove activation label before monitoring.

4. For personnel monitoring, attach the badge near the user’s breathing zone (i.e. the collar) with the front side exposed to the surrounding atmosphere.

5. For area monitoring, attach the badge to a stand and mount in a centralized area with the front side exposed to the surrounding atmosphere.

6. The exclamation mark appears within the triangle when phosgene is present. Please note that the exclamation mark will appear underneath the printed exposure dose (sensitivity).

7. To obtain the average concentration, divide the exposure dose (ppm∙min) by the exposure time in minutes (min).



The ChromAir phosgene monitor should be refrigerated in its sealed bag at all times.


Sampling Parameters

Color Change

yellow to red

Exposure dose (Badge)

0.5 ppm∙min (8.3 ppb∙hr)

Exposure dose (Badge with color comparator ext. range)

0.5 - 450 ppm∙min

Minimum detectable limit (8 hours)

0.001 ppm

Maximum recommended sampling time

3 days

Minimum recommended sampling time - Badge responds instantly to phosgene. However, the shortest experimentally quantifiable exposure sampling time is 1 minute

1 minutes

Relative humidity range

10% - 100%

Face velocity range

5 - 168 cm/sec

Temperature range

55ºF - 99ºF

Light effect - UV (direct sunlight) - Extensive exposure to direct sunlight will lead to darkening of the background. This may cause difficulty reading exposures less than 5 ppm∙min.

no effect

Light effect - visible

no effect

Refrigerated shelf life

1 year



383016 & 382036 Manual

Phosgene Information

More Information
Manufacturer Morphix
Call For Price No
Gas Phosgene (COCl2)
Operational Temperature Range 55°F - 99°F
Operational RH Range 10% - 100%
Maximum Exposure 0.9 ppm∙min (15 ppb∙hr)
Audible Alarm No
Calibration N/A
Sensor Life 3 Days
Range 0.5-450 ppm-min
Sensor Range

0.5-450 ppm-min

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