Definer 220 successfully calibrates Met One Super SASS (TM) Speciation Sampler

Last week Bios engineers performed successful field calibrations using the new Definer 220 primary calibrator with the latest Met One Super SASS speciation sampler.  Three US EPA staff members an two state EPA staff members were present for the testing which validated the use of the Definer 220 as an acceptable flow standard for the calibration of these modern, highly capable compliance monitoring speciation samplers.