Clean Room Testing and
Contamination Control Services

Clean Room Testings is critical to maintaining contamination-free environments for industries like semiconductors, pharmaceuticals, and biotech. At Cesstech, our Cleanroom and Contamination Control Testing services offer third-party performance certification with over 30 years of proven experience.

Our Approach to Clean Room Testing

Cesstech (s) Pte Ltd offers a comprehensive range of auditing, qualification and testing/certification services for micro-contamination control. We are a certified third-party cleanroom performance testing firm, backed by a team of professionals that include NEBB-qualified and -certified Cleanroom Performance Testing (CPT) supervisors.

Our key staffs have an exemplary track record over 30 years across a wide range of industrial sectors. Our services are designed to:

Develop test methodology/acceptance criteria/compliance verification plan
Provide performance testing and contamination studies
Identify problems and generate formal reports with recommendations
Facilitate historical data compilation and trend analysis over time

Benefits:

Independent 3rd party assessment
Development of test methodology / acceptance criteria/compliance verification plan
Problem identification and solution provision
Formal reports with recommendation
Conformance with industry recognised standards and protocols
Compliance with quality assurance guidelines within the facility
Facilitation of historical data compilation and trend analysis over time

Advantage:

Experience in a diversity of industrial sectors
Exemplary track record
All testing and studies supervised by qualified NEBB certified cleanroom testing supervisors
On-smiddle shop for performance testing and contamination studies
Comprehensive arsenal of equipment – both hardware and software
Trained technicians and engineers with relevant experience

Benefits:

Independent 3rd party assessment
Development of test methodology / acceptance criteria/compliance verification plan
Problem identification and solution provision
Formal reports with recommendation
Conformance with industry recognised standards and protocols
Compliance with quality assurance guidelines within the facility
Facilitation of historical data compilation and trend analysis over time

Advantage:

Experience in a diversity of industrial sectors
Exemplary track record
All testing and studies supervised by qualified NEBB certified cleanroom testing supervisors
On-smiddle shop for performance testing and contamination studies
Comprehensive arsenal of equipment – both hardware and software
Trained technicians and engineers with relevant experience

Clean Room Performance Testing

The performance tests that we conduct include :

Air Volume, Velocity & Uniformity Tests
Temperature/RH (General & Comprehensive) Test
Airflow Parallelism Test
Flooring Resistance Tests (RTG/PTP)
Vibration Test
Airborne Particle Count
Sound Pressure Level Test

Lighting Level Test
Air Visualisation Study
HEPA/ULPA Installation Leak Test
Aerosol challenge/Photometer Method
Aerosol Particle Challenge/Particle Counter Test Method
Recovery Test
Room Integrity Test
Electrostatics/Air Ionizer Performance Tests
Cleanroom Suitability Assessment of Equipment
Cleanroom Equipment Testing and Certification

Cleanroom Performance Testing

Certificates

Our Testing & Certification Services

Re-certification/Compliance verification

We will periodically test and certify your operational clean rooms, clean-air devices or mini-environments to ensure continued compliance of critical parameters such as:

airborne particle levels (cleanliness class)
airflow velocity
pressurisation and temperature/RH

Training

We provide training for your technicians and engineers in:

Cleanroom/Mini-environment Performance Testing and Certification
ISO Cleanroom Standards and Application
Implementation of a Monitoring Plan for Periodic Verification of Clean Rooms
Basics of Cleanroom Testing

Our training sessions incorporate practical exercises and can be delivered either as a half-day or full-day seminar.

Monitoring Plan per ISO 14644-2

We will assess your cleanroom facilities and provide a written monitoring plan based on ISO 14644-2 Cleanroom guidelines. This plan covers:

frequency of re-testing
sampling plan
parameters to be monitored
acceptance limits
remedial-action or contingency plans
compliance verification plans
training requirements

Contamination control studies/ surveys

We will survey your clean room or clean environment for particle contamination. This will involve a series of tests and data collection via real-time monitoring of the hardware/software and may include an air visualisation study to assess the airflow within the clean room.

We will then make recommendations for the reduction and control of the contamination.

Material compatibility with cleanliness classes

Testing of materials like fans, motors, fan filter units, conveyor parts, etc., to ascertain their compatibility to cleanroom cleanliness classes with regard to particulation. This involves the formulation of a detailed test plan based on the:

test methodology
monitoring parameters
monitoring duration
criteria for acceptance

In most cases, the conclusion is drawn based on a proper statistical analysis of the results obtained.

Long-term particle count studies

Some clean rooms are vulnerable to intermittent particle contamination and longer-term studies need to be conducted to ascertain the sources of the contamination.

Appropriately placed remote particle sensors and software monitor the particle trends at different locations within the cleanroom facility over time. The results are analysed and the sources of contamination identified so that remedial action can be taken.

These studies can take between one week and a few months to complete depending on the individual circumstances.

Particle count measurements in utilities/facilities

We use standard or modified particle counters to measure the airborne particle counts within compressed air piping, de-ionized water and speciality tools within clean-air devices, according to recognised test methods and protocols.

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Why Choose Our Clean Room Testing Services?

NEBB-Certified Cleanroom Performance Testing Professionals and technicians
Our Certified Cleanroom Specialists bring years of hands-on experience across pharmaceutical, semiconductor, medical device, and biotech sectors with over 30 years of experience.
We test in full compliance with ISO 14644, IEST, GMP, and other international regulations, ensuring your cleanroom is always audit-ready.
We use state-of-the-art, regularly calibrated instruments to ensure precise and reliable results every time.
Our reports are comprehensive, detailed, and easy to understand — perfect for satisfying both management and regulatory inspectors.
We have in-depth knowledge of pharmaceutical, medical device, food, and electronics cleanroom environments, allowing us to tailor our approach.
Trusted by leading local and global brands, we have a strong track record of successful cleanroom qualifications and re-certifications.
We uphold the highest standards of accuracy, safety, and professionalism, protecting your product integrity and compliance status.

At Cesstech, we go beyond standard testing — we design tailored methodologies, track compliance trends, and deliver clear, actionable reports. From routine re-certifications to pinpointing contamination sources, we provide precise, industry-compliant testing and verification you can trust.(p)

With over 30 years of expertise in clean room testing and contamination control services, Cesstech has built a reputation for testing integrity that never compromises on compliance. Every cleanroom performance test we conduct follows rigorous, documented methodologies in full alignment with ISO 14644, IEST, GMP, and other global standards. Our independence as a third-party certification provider ensures that results are unbiased, precise, and fully defensible during audits. From initial clean room qualification to routine re-certifications and contamination troubleshooting, our NEBB-certified specialists combine deep industry knowledge with state-of-the-art instrumentation to safeguard operational compliance, product integrity, and environmental control

Achieve uncompromising compliance and performance — choose Cesstech for certified cleanroom testing and contamination control.

Clean Room Testing and Contamination Control Services

Our Approach to Clean Room Testing

Benefits:

Advantage:

Benefits:

Advantage:

Clean Room Performance Testing

The performance tests that we conduct include :

Cleanroom Performance Testing

Certificates

Our Testing & Certification Services

Why Choose Our Clean Room Testing Services?

Let's start a new project together!

Clean Room Testing and
Contamination Control Services