Reliable Testing Laboratory offers DOP testing (Dispersable Oil Particle Tests) using PAO (Poly Alpha Olefin). DOP tests are carried out to check the integrity of the HEPA (High Efficiency Particulate Arrestor) filters. Reliable Testing Laboratory offers both onsite and offsite tests for your HEPA filtered equipment. Our technicians use state of the art equipment and are well trained, certified and experienced. DOP testing is done using the safest procedures and conform to international standards. Reliable Testing Laboratory can also test for Clean Rooms.