The 3M Diffusion Monitor is a sampling device designed to measure average concentrations of certain contaminants over a measured time interval.
It can be used for either personal or area monitoring. As a personal monitor, it is worn near the breathing zone of individuals exposed to potentially hazardous environment. When used as an area monitor, hang it away from walls, corner, table tops, or other regions where the air movement in the room may be limited.
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.
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.
Store in an area free of organic vapors and/or ethylene oxide.
Shelf life is 18 months from date of manufacture. Expiration date is printed on packaging in a MM_YY format.
3500 - Organic Vapour Monitor (5 monitors per case)
3520 - Organic Vapour Monitor with Back-up Section (5 monitors per case)
3520B - Organic Vapour Monitor with Back-up Section (bulk purchase of 3520 - 50 monitors)
3551 - Ethylene Oxide Monitor (5 monitors per case)
3721 - Formaldehyde Monitor (5 monitors per case)
3500 organic vapor diffusion monitors contain a single charcoal adsorbent-pad. The 3500 monitor is designed to be analyzed by the user or by an independent laboratory.
3520 / 3520B
The 3M Organic Vapor Monitor 3520, with Backup Section uses the proven scientific principle of diffusion, which is the gradual mixing of molecules of two or more substances. Primary and back-up sorbent pads are included for sampling demanding environments. Especially suited for monitoring compounds like acrylonitrile, butadiene and methylene chloride for which activated carbon shows limited capacity. It has two stages for increased sampling capacity. Increased sampling may be necessary when sampling volatile compounds (compounds with low boiling points), high or unknown concentrations, complex mixtures, or when sampling in high humidity conditions. It has an 18-month shelf life.
The 3M Organic Vapour Monitor 3520 is suited for compounds for which activated carbon shows limited capacity. It has the accuracy of +/-25% at a 95% confidence level for many workplace contaminants.
The ethylene oxide diffusion monitors contain a single treated charcoal adsorbent pad. The 3551 must be analyzed within 4 weeks after sampling. The 3551 monitor is designed to be analyzed by the user or by an independent laboratory.
Meets current OSHA accuracy requirements for 8-hour sampling which are +/- 25% at 1.0 ppm, +/- 35% at 0.5 ppm. Also meets accuracy requirements for short-term exposure limit (STEL) sampling of +/- 35% at 5.0 ppm.
The 3M Formaldehyde Monitor 3721 uses the proven scientific principle of diffusion, which is the gradual mixing of molecules of two or more substances.
The 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.
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