The ACD-300 Activated Charcoal Deodorizer is designed to remove odorant from natural gas “bleed” associated with natural gas control instrumentation. The ACD-300 saves money by minimizing leak call outs in populated areas. The ACD-300 may be installed on all Becker Precision Equipment control instrumentation that discharges natural gas to atmosphere. The ACD installs on the vent exhaust port of the control instrument and is applicable for units that “bleed” constantly or intermittently.