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3M™ Formaldehyde Monitor 3721 uses the proven scientific principle of diffusion, which is the gradual mixing of molecules of two or more substances. It monitors personnel or work areas in health care, laboratories and in the chemical, pulp/paper, foundry and textile industries. Analysis procedure is available upon request. The monitor uses a bisulfite-impregnated filter and is analyzed by colorimetry. The 3721 can be used for 8 hour TWA sampling to meet the OSHA requirement of +/-25% accuracy at 0.5-5.0ppm. However, this monitor does not have the sensitivity for short term exposure limit (STEL) monitoring. It has an 18-month shelf life.
Features
Simple and convenient
No batteries, hoses or pumps to operate
Easy to use - Just clip the monitor to shirt lapel, collar, or pocket
Versatile - 3M monitors can also be used for area monitoring, if sufficient air flow exists
3M provides reference information needed to use the monitors
Analysis options, 3M monitors can be analyzed in the lab of your choice or returned to a 3M contracted lab for analysis
Confidence - Our testing facilities are accredited by the American Industrial Hygiene Association
Comfort - 3M monitors are small and lightweight and will not interfere with employee activities
