Opacity Certification Services, LLC (OCS) is now compliant with the most current PS-1, Procedure 3 (Appendix F) and ASTM D6216-12.
OCS opacity filter recertifications are performed in-house with a laboratory-based spectrophotometer, and calibrated with NIST SRM's to provide NIST traceability. OCS meets or exceeds requirements set in 40 CFR Part 60, Appendix B, Performance Specification 1.
We recertify and manufacture opacity filters for just about any brand of monitor on the market.
If you are experiencing issues with your original Teledyne-Monitor Labs LightHawk 560 filters, OCS can help. Our new opacity filters are guaranteed not to drop more than 0.3 absolute opacity over a one-year period. We manufacture filters for most brands and models on the market, including: