As a NRPP certified radon professional I am required to engage in continued education as a requirement of my certification renewal. NRPP certified radon professionals are required to have both class time hours and proficiency testing prior to certification.
I use a Radstar RS300 continuous radon monitor for most radon tests. The Radstar RS300 takes hourly radon samples from the surrounding air. The machine is tamper resistant, durable and offers consitant, accurate results immediately at the time of pickup.