Swabs and Applicators

Swabs and Applicators

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Swabs and Applicators

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Cotton Bud, Foam & Fabric Swabs for Cleanroom & Electronic Cleaning

Coventry™ cleanroom swabs and applicators keep contamination out of your process, improve yield, and perform consistently, shipment to shipment. To manufacture a Coventry swab, we start with engineered clean materials. Polyester swab and wipe components are laundered first in our Class 10 (ISO Class 4) cleanroom. Coventry has a wide variety of choices to meet your most demanding applications. The wrapped swab, uniquely designed with no seams or edges, prevents scratching of delicate surfaces. Also included in the product line are sealed fabric, sealed foam, and static control.

Chemtronics swabs are engineered for controlled environments, light industrial, and electronic rework and repair applications. 

Foamtip Swabs Chemtronics Foamtip Swabs
Highly absorbent precision foam swab with a wide variety of head sizes and shapes
Flextip Swabs flex-tips swab
Foam swabs with a flexible head for cleaning optics and small confined areas
Chamois Tip Swab Chemtronics Chamois Tip Swabs-3
Line free swabs that are ideal for cleaning audio and video heads and optical pick-ups
Microtip Swab Chemtronics Microtip Swabs-3
Precision applicator for pinpoint solvent, adhesive and lubricant application
Cottontip Swabs Chemtronics Cottontip Swabs
The economical cotton swab designed for general cleaning applications
Coventry Sealed Polyester Swabs 	Coventry Sealed Polyester Swabs
Exceptionally clean, tough and durable polyester swab
Coventry Sealed Foam Swabs Coventry Sealed Foam Swabs
Economical versatile cleanroom foam swab
Coventry ESD Static Control Swabs ESD Swabs
Swabs prevent destructive static discharge
Coventry Wrapped Foam Swabs Coventry Wrapped Foam Swabs
Durable foam-wrapped swabs designed for precise applications
Coventry Diamond Swabs
Swab designed to reduce potential for scratching delicate surfaces
Coventry Pillow-Tip Swabs Coventry Pillow-Tip Swabs
Cleanroom washed fabric formed into unique solvent-retaining swab
Fiber Optic Connector Cleaning Swabs fiber optic swabs
Ideal swabs for cleaning contamination from fiber optic sleeves, backplanes and polishing pucks
V-Groove and Ferrule Cleaning Swabs V-Groove and Ferrule Cleaning Swabs
Swab for V-groove and ferrule cleaning
Fusion Splice Mirror Cleaning Swabs fusion splice swab
Cleanroom washed fabric formed into a unique swab for fusion mirror cleaning


How do the different cleanroom classification methods compare?

Cleanroom classification methods are used to categorize cleanrooms based on their level of cleanliness. The primary methods for classifying cleanrooms include ISO 14644-1, FS 209E, and EU GMP Annex 1. Here's a comparison of these methods:

ISO 14644-1 (International Organization for Standardization):

ISO 14644-1 is a globally recognized standard for cleanroom classification. It replaced the previous FS 209E standard in most parts of the world.

It uses the concept of airborne particle counts to classify cleanrooms into different classes. The particle counts are measured in particles per cubic meter (e.g., ISO Class 5, ISO Class 7, ISO Class 8, etc.).

ISO 14644-1 also sets limits for particles of different sizes (0.1 μm, 0.5 μm, 1 μm, 5 μm, etc.) that are permitted in each class of cleanroom.

FS 209E (Federal Standard 209E):

FS 209E was a widely used cleanroom classification standard in the United States before being replaced by ISO 14644-1.

Like ISO 14644-1, FS 209E classifies cleanrooms based on airborne particle counts. However, the classes and allowable particle counts are different between the two standards.

For example, an ISO Class 5 cleanroom corresponds to a Class 100 cleanroom in FS 209E. The numbers indicate the maximum allowable number of particles per cubic foot.

EU GMP Annex 1 (European Union Good Manufacturing Practice, Annex 1):

EU GMP Annex 1 is a guideline specific to cleanrooms used in the pharmaceutical industry within the European Union.

It includes requirements for cleanroom classification and monitoring but focuses more on the manufacturing of sterile medicinal products.

Annex 1 recommends similar airborne particle limits as ISO 14644-1 for different cleanroom grades (Grade A, B, C, D), but it also emphasizes microbial monitoring and control.


ISO 14644-1 is now the most widely adopted standard worldwide, offering a more consistent global approach to cleanroom classification.

FS 209E is no longer commonly used, but it's worth noting its historical significance and its influence on cleanroom standards.

EU GMP Annex 1 is specific to the pharmaceutical industry within the European Union, addressing both particle and microbial control, but its principles align with those of ISO 14644-1.

When considering cleanroom classification, it's essential to understand the specific requirements of the industry and region where the cleanroom is located. Manufacturers and regulatory bodies often follow one of these standards to ensure the appropriate level of cleanliness for their specific applications.

What are environmental swabs?

Environmental swabs are sampling tools used to collect samples from surfaces in the environment to test for the presence of various microorganisms, contaminants, or residues. These swabs typically consist of a sterile swab attached to a handle, which makes it easy to swipe and collect samples from different surfaces.

The primary purpose of environmental swabbing is to assess the cleanliness and hygiene of surfaces in various settings, including healthcare facilities, food processing plants, laboratories, and public spaces. By testing environmental swabs, organizations can monitor and identify potential sources of contamination, prevent the spread of infections, and ensure compliance with health and safety standards.

Common uses of environmental swabs include:

  • Microbial monitoring: Swabs are used to detect and quantify bacteria, fungi, and other microorganisms present on surfaces. This is particularly important in healthcare settings and food processing facilities to prevent the spread of infections and maintain product safety.
  • Allergen detection: Swabs are employed to identify the presence of allergens in food processing areas, helping to prevent cross-contamination and ensure product safety for individuals with specific allergies.
  • Residue detection: Swabs can be used to test for the presence of chemical residues, such as cleaning agents, pesticides, or heavy metals, on surfaces to ensure compliance with safety regulations.
  • Cross-contamination prevention: Environmental swabs can identify potential sources of cross-contamination in various industries, ensuring that proper sanitation measures are in place.

To use an environmental swab, the swab is rubbed or rolled over the targeted surface to collect any microorganisms or contaminants present. The swab is then returned to its sterile packaging for transport to a laboratory, where it is processed for analysis and identification of any potential hazards.

It is important to use proper sampling techniques and follow established guidelines to obtain accurate and reliable results. Environmental swabbing is a valuable tool in ensuring the safety and cleanliness of various environments.

What are the different types of cleanroom swabs?

Cleanroom swabs are essential tools used in controlled environments, such as cleanrooms, where maintaining high levels of cleanliness and avoiding contamination is crucial. Different types of cleanroom swabs are designed to meet specific requirements and are made from various materials to suit different applications. Some common types of cleanroom swabs include:

  • Foam Swabs: Foam swabs are made from polyurethane foam, which has excellent solvent compatibility and high absorbency. These swabs are ideal for cleaning delicate surfaces, applying solvents, and removing excess residues. Foam swabs come in different sizes and shapes to address various cleaning needs.
  • Polyester Swabs: Polyester swabs are constructed from a synthetic material that has low particle generation and good chemical resistance. These swabs are often used in precision cleaning applications, particularly in sensitive electronic components and hard-to-reach areas.
  • Microfiber Swabs: Microfiber swabs are designed to trap and remove microscopic particles effectively. They are often used in cleaning sensitive optical surfaces, camera lenses, and other high-precision equipment.
  • Cotton Swabs: Cotton swabs, also known as cotton-tipped swabs, have a cotton tip attached to a plastic or wooden handle. They are commonly used in less critical cleanroom environments for general cleaning and application of solutions.
  • ESD-Safe Swabs: Electrostatic discharge (ESD)-safe swabs are designed to prevent damage to sensitive electronic components that could be harmed by static electricity. These swabs are usually constructed with conductive materials that dissipate static charges.

It's important to select the right type of cleanroom swab based on the specific needs of the cleanroom environment and the surfaces or equipment being cleaned. Each type of swab has unique characteristics that make it suitable for different applications, so proper selection is essential to ensure effective cleaning and avoid any risk of contamination.

What are the uses of cleanroom swabs?

Cleanroom swabs are essential tools used in various industries, especially in environments that require strict contamination control, such as cleanrooms and sensitive manufacturing processes. These swabs are designed to effectively clean and remove particles, residues, and contaminants without leaving any trace of lint or other foreign matter. Some common uses of cleanroom swabs include:

  • Electronics Manufacturing: Cleanroom swabs are extensively used in the electronics industry for cleaning delicate electronic components, printed circuit boards (PCBs), and other sensitive equipment during assembly, testing, and maintenance processes.
  • Pharmaceutical and Biotechnology: In pharmaceutical and biotech cleanrooms, swabs are used to sample surfaces and equipment to ensure proper hygiene and prevent cross-contamination.
  • Aerospace and Defense: Cleanroom swabs are employed in aerospace and defense applications for cleaning critical components, optics, and precision instruments to maintain performance and reliability.
  • Medical Device Manufacturing: During the manufacturing of medical devices and equipment, cleanroom swabs are utilized to ensure proper cleanliness and quality of the products.
  • Optics and Photonics: In the optics and photonics industry, where precision is crucial, cleanroom swabs are used to clean lenses, mirrors, and other optical components without scratching or damaging them.
  • Semiconductor Industry: Cleanroom swabs are widely used in the semiconductor manufacturing process to clean and maintain the purity of wafers, chambers, and other semiconductor equipment.
  • Automotive Manufacturing: In automotive manufacturing facilities, cleanroom swabs are used for cleaning sensitive electronic components, sensors, and precision parts.
  • Food and Beverage Production: In the food and beverage industry, cleanroom swabs are used to monitor and maintain cleanliness in processing equipment and packaging areas.
  • Printers and Print Head Maintenance: Cleanroom swabs are employed to clean print heads and other critical components in printers, ensuring consistent print quality.
  • Laboratories: In research and analytical laboratories, cleanroom swabs are used for sampling, cleaning, and handling sensitive instruments and equipment.

It's important to note that different cleanroom swabs are designed for specific applications and requirements, such as solvent compatibility, particle generation, and overall cleanliness. When selecting cleanroom swabs, it is crucial to consider the specific needs of the application and ensure that the swabs meet the required standards and specifications for cleanliness and performance.

What is a cleanroom swab?

A cleanroom swab is a specialized cleaning tool used in controlled environments such as cleanrooms, laboratories, and manufacturing facilities where maintaining a high level of cleanliness and eliminating contaminants is essential. Cleanrooms are environments with low levels of airborne particles and other pollutants to ensure the integrity of sensitive processes, products, or experiments.

Cleanroom swabs are designed to be non-shedding, low in particle generation, and non-reactive, so they do not introduce contaminants or interfere with the materials being processed or tested. They come in various shapes and sizes, typically with a handle or shaft made of materials like plastic, wood, or metal, and a head made from materials like foam, polyester, or microfiber.

The choice of swab material and construction depends on the specific cleaning requirements and the type of surface or equipment being cleaned. Some cleanroom swabs are pre-saturated with isopropyl alcohol or other cleaning agents to aid in removing residues and contaminants.

Cleanroom swabs play a critical role in various industries, including semiconductor manufacturing, pharmaceuticals, biotechnology, aerospace, and medical devices, where even tiny particles or contaminants can cause significant defects or compromise product quality. Proper cleaning and maintenance of cleanrooms and equipment are vital to ensure consistent and reliable performance in these industries.

What is the best swab to use for high temperature applications, like cleaning out a hot mold?

The head of a foam swab with degrade, tackify and breakdown around 275°F. The polypropylene handle will melt around 320°F. A better option to resist the degrading effect of the high temperatures is a polyester swab head on a nylon handle such as 51353, 51121 or 52121. 52121 would probably be the best, because it’s 6 inches long which keeps more safe distance between the hot mold and the user. It should be able to handle temperatures approaching 500°F.

Are swabs available for cleaning static sensitive electronics?

Yes, Chemtronics offers a full line of ESD swabs. They include foam, knit polyester, or knit microfiber heads with static dissipative handles. The proprietary handle material has surface resistivity of 1.0 x 10_10 ohms/sq, and will dissipate 99% of (5 kV) charge in 0.5 seconds. This avoids static generation, and can dissipate a charge when the user is grounded.

Are Q-tips / cotton bud swabs lint free?

No, cotton bud swabs (aka Q-tips) can’t be considered lint-free. Cotton tends to lead behind threads and particulates. Open cell polyurethane foam swabs are a common, very clean replacement for cotton. If harsh solvents are being used on the swabs, or even more cleanliness is needed, knit polyester or microfiber swabs are an excellent choice.

What is a foam swab? / Why should I use a foam swab?

While cotton bud swabs (aka Q-tips) are commonly used for all kinds of precision cleaning, foam swabs are commonly used to reduce contamination from cotton threads and particulates. Foam swabs are usually made of open cell polyurethane for maximum cleanliness and absorbency.

What is a sterile swab?

Sterile swabs are free from bacteria or other living microorganisms. Common methods for sterilization include autoclaves, ETO (ethylene oxide gas), and Gamma irradiation. Sterile swabs are generally used for biological sample collection to avoid sample contamination, and for medical use to avoid infection.


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