The HV-500R high volume air sampler can also collect dioxins when combined with shuttle tubes or other optional parts. HV-500RD and HV-500RD1 are portable dioxin samplers.A dia. 110 mm round filter is designed to be attached to the HV-500RD, and an 8″ × 10″ square filter to the HV-500RD1. The available suction flowrate varies with differences in the filter shape, so select the model in accordance with the measurement specifications.