Hydrazine SafeAir Color Comparator (383001)

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 badge overseas

Hydrazine Information

Call For Price

Color change for Hydrazine is from orange to maroon.

The SafeAir Hydrazine badge may be used for personnel or area monitoring for exposure times ranging from 5 minutes to 2 days. For higher resolution, this color comparator can be used with the SafeAir hydrazine badge  (part number: 382002-50).



Hydrazine is a colorless liquid with a penetrating odor resembling that of ammonia. It is extremely destructive to the tissues of the mucous membranes and upper respiratory tract. Symptoms of exposure may include coughing, shortness of breath, wheezing, laryngitis, headache, nausea and vomiting. OSHA exposure limit for hydrazine is 1 ppm (TWA). NIOSH exposure limit for hydrazine is 0.03 ppm (2 hour ceiling). NIOSH recommends that hydrazine be handled as a potential occupational carcinogen in the workplace.

Hydrazine is used predominantly as a fuel for rocket and jet engines and in the manufacturing of pharmaceuticals. Hydrazine salts are used in refining and as corrosion inhibitors.


Principle of Operation

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

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

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

6. To obtain the average concentration, divide the exposure dose (ppb∙hr) by the exposure time in hours (hr).



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


Sampling Parameters

Color Change

orange to maroon

Exposure dose (Badge)

8 ppb-hr

Exposure dose (Badge with color comparator)

4.5 – >300 ppb∙hr

Minimum detectable limit (8 hours)

1 ppb

Maximum recommended sampling time

2 days

Minimum recommended sampling time

5 minutes

Relative humidity range

23% - 83%

Face velocity range

5 - 168 cm/sec

Temperature range

63ºF - 95ºF

Light effect - UV (direct sunlight)

no effect

Light effect - visible

no effect

Color stability

4 weeks

Refrigerated shelf life

1 year



383001 & 382002 Manual

Hydrazine Information

More Information
Manufacturer Morphix
Call For Price No
Gas Hydrazine
Operational Temperature Range 63°F - 95°F
Operational RH Range 23% - 83%
Maximum Exposure 8 ppb-hr
Audible Alarm No
Calibration N/A
Sensor Life 2 Days
Range 4.5-300 ppb-hr
Sensor Range

4.5-300 ppb-hr

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