PERFORMANCE
Sensitivity       nA/ppm in 1ppm SO2                     250 to 550
Response time     t90(s) from zero to 1ppm SO2           < 40
Zero current      ppm equivalent in zero air             < ± 0.03
Resolution        RMS noise (ppm equivalent)              < 0.005
Range             ppm limit of performance warranty       10
Linearity         ppm error at 200ppb SO2, linear at zero and 140ppb SO2      < ± 0.03
Overgas limit     maximum ppm for stable response to gas pulse            200