1. We work with safety conscious at all time.
2. We take responsibility in Fast Respond, Quality Control, and Efficiency in Executing our Work and Customer Satisfaction.
3. We learn on every situational issues and improve ourself each day.
4. We build our company with team spirit and help each others like a family member.
5. We observe good discipline and learn to take instruction in detail.
6. We engage in succession plan for company future.
7. We put our effort to improve on 3M’s Man, Money, and Management.
8. We encourage staff loyalty and long service.
9. We encourage staff to sincerely tell the truth but not one half truth on every event happened during their daily work.
10. We want staff to take responsibility of their duties and encourage them to be aggressive with competitive fighting spirit to carry out the daily mission.

Cleanroom Test & Certification
PMT provides cleanroom test and certification services to confirm that your cleanroom performs to its specified class. Airborne particle counts are assessed against the limits in ISO 14644-1 (2015), together with the supporting environmental tests listed below.
Test Description
- Airborne Particle Count Test
- Airflow Velocity Test
- Temperature Test
- Relative Humidity Test
- Room Pressurization Test
- Scan Leak Test
- Light Intensity Level Test
- Sound Pressure Level Test
- Airflow Parallelism Test
- Flooring Resistance Test
- Recovery Test
- Other tests on request
Test Conditions
As Built
The installation is complete, with all services connected and functioning, but with no production equipment, materials or personnel present.
At Rest
The installation is complete, with equipment installed and operating in a manner agreed between the customer and supplier, but with no personnel present.
Operational
The installation is functioning in the specified manner, with the specified number of personnel present and working in the manner agreed upon.
Airborne Particle Classes (ISO 14644-1)
| Class | 0.1 µm | 0.2 µm | 0.3 µm | 0.5 µm | 1.0 µm | 5.0 µm |
|---|---|---|---|---|---|---|
| ISO 1 | 10 | – | – | – | – | – |
| ISO 2 | 100 | 24 | 10 | – | – | – |
| ISO 3 | 1,000 | 237 | 102 | 35 | 8 | – |
| ISO 4 | 10,000 | 2,370 | 1,020 | 352 | 83 | – |
| ISO 5 | 100,000 | 23,700 | 10,200 | 3,520 | 832 | 29 |
| ISO 6 | 1,000,000 | 237,000 | 102,000 | 35,200 | 8,320 | 293 |
| ISO 7 | – | – | – | 352,000 | 83,200 | 2,930 |
| ISO 8 | – | – | – | 3,520,000 | 832,000 | 29,300 |
| ISO 9 | – | – | – | 35,200,000 | 8,320,000 | 293,000 |
Need a cleanroom test or certification quote? Call 02-900-6900-5 or email [email protected]
Request a QuotePartner
PMT was founded in September 2000 with the aim is to provide excellent and speedy services to many diverse markets including semi-conductors, electronics, pharmaceutical, medical devices, chemical supply, computer disk drive, automotive, food& drink, institution & other high technology driven environments.





