Reading 1 ppm on legacy Interscan sulfuryl fluoride monitors [Model GF-1900]
1.0 Background 1.1 Historical In the mid-1980’s, Interscan developed an instrument to be used in the clearance of structures treated with Vikane® gas fumigant. At the time, the reentry level was set at 10 ppm (parts-per-million). The measuring range of the instrument was 0-50 ppm, with an integral analog meter. The units were…