Air Quality Assessment Tools

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We tailor our Environmental Assessment service to meet the specific needs of each of our customers. Our technical services team will work with you and your staff to provide the following services and recommend control solutions.

• Complete site inspection
• Use of Purafil patented reactivity monitoring devices
• Review of facility plans
• Interviews of process, facility, and equipment engineers and managers
• Review of maintenance logs
• Inspection of tools, circuitry and air handler equipment
• Investigation of surrounding facilities and possible emission sources
• Investigation of contamination movement against pressure gradients

Passive Assessment: Corrosion Classification Coupons for Industrial, Commercial and Water-Wastewater Applications

Use Purafil Corrosion Classification Coupons to determine the types and levels of corrosive gases in your control room, motor control center, rack room, or other area housing sensitive electronics.

HERE'S HOW IT WORKS:
• Step 1: Place the coupon in the room of concern for a period of 30 days. Exposing the coupons to the corrosive gases in your environment will result in the buildup of a corrosion film on your coupon.
• Step 2: Return the coupon to Purafil’s research and development laboratory for analysis.
• Step 3: Purafil will analyze the corrosion buildup on your coupon to determine the rate of corrosion, the types of corrosive pollutants in your environment as well as their relative levels. Purafil will then provide a report detailing the severity of corrosion in the room as defined by the Instrumentation, Systems, and Automation Society (ISA) Standard 71.04-1985, the accepted guideline for warranties of electronic equipment.
• Step 4: Meet with your local Purafil representative to determine which areas are in greatest need of protection from corrosive, acid gases. Based on the results of the report, your Purafil representative will be better able to help recommend a customized solution.

Passive Assessment: Environmental Reactivity Coupons for Cleanroom/AMC Applications

The Purafil Environmental Reactivity Coupon (ERC) uses copper and silver-plated sensors to measure the level of airborne molecular contaminants (AMC). As part of Purafil’s assessment service, Purafil’s laboratory analyzes field-exposed coupons and provides a comprehensive report detailing the species of contaminants that exist and the overall AMC severity level.

Why use ERCs for Environmental Assessment?
Purafil’s passive assessment service takes into account the synergistic effects of multiple contaminants present. Also, the results of Purafil’s ERC analysis can be related directly to acceptance criteria for air quality in cleanrooms.

Cleanroom/AMC Air Quality Standards

Purafil’s passive and active environmental assessment monitors use copper and silver sensors to measure the severity level of airborne molecular contaminants (AMC). With more than 30 years of experience in providing clean air solutions, Purafil offers a comprehensive database of reactivity assessment results from cleanroom facilities worldwide. From these results, and taking into consideration currently recommended AMC control levels, the following Air Quality Standards have been established.

The purpose of the Air Quality Standards is to classify cleanroom environments according to the severity of copper and silver sensor corrosion. The standard identifies five Air Quality Classifications — pure, clean, moderate, harsh, and severe — based on the rate of corrosion (measured in Angstroms) over a period of 30 days. The Air Quality Classifications, defined as follows, characterize the environment as to its possible effects on process reliability.

Pure: AMC does not pose a measurable threat to processes.
Clean: AMC is measurable, but does not pose an immediate threat to processes.
Moderate: AMC in slightly above the levels considered acceptable for reliable operation.
Harsh: AMC is above the levels considered acceptable for reliable operation.
Severe: AMC poses an immediate threat to reliable operations.

Passive Assessment: Environmental Reactivity Coupons for Museum Applications

As part of your air quality assessment, ERCs are placed in multiple locations throughout your facility — at the outside air intakes, in archival storage rooms, in restoration laboratories, and other areas of concern. The ERCs are left in these areas for a brief period, during which time airborne pollutants form a corrosion film on the coupon’s copper, silver, and/or gold-plated sensors. Following assessment, Purafil’s laboratory provides a comprehensive report detailing each environment’s air quality severity level and air quality classification.

Purafil’s air quality assessment service offers the following benefits:

• Simple and Economical: Purafil’s air quality assessment service requires no disruptive or expensive on-site monitoring with instrumentation.
• Practical and Effective: Assessment results correlate directly with industry-accepted air quality classifications.
• Reliable: The amount of corrosion forming on the ERCs over a given period is a primary indicator of how well controlled an environment may be.
• Comprehensive: Laboratory ERC analysis reveals information on general classes of gases present, estimated concentration levels, and humidity effects.

Passive Assessment: Corrosion Classification Coupons for Industrial Applications

Use Purafil Corrosion Classification Coupons to determine the types and levels of corrosive gases in your control room, motor control center, rack room, or other area housing sensitive electronics.

HERE'S HOW IT WORKS:
• Step 1: Place the coupon in the room of concern for a period of 30 days. Exposing the coupons to the corrosive gases in your environment will result in the buildup of a corrosion film on your coupon.
• Step 2: Return the coupon to Purafil’s research and development laboratory for analysis.
• Step 3: Purafil will analyze the corrosion buildup on your coupon to determine the rate of corrosion, the types of corrosive pollutants in your environment as well as their relative levels. Purafil will then provide a report detailing the severity of corrosion in the room as defined by the Instrumentation, Systems, and Automation Society (ISA) Standard 71.04-1985, the accepted guideline for warranties of electronic equipment.
• Step 4: Meet with your local Purafil representative to determine which areas are in greatest need of protection from corrosive, acid gases. Based on the results of the report, your Purafil representative will be better able to help recommend a customized solution.