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PERFORMANCE SensitivitynA/ppm in 50ppm NH3： 25 to 45
               Response time t90(s) from zero to 50ppm NH3：<60
               Zero current ppm equivalent in zero air：< ±7
               Resolution RMS noise (ppm equivalent)：<0.3
               Range ppm NH3 limit of performance warranty： 100
               Linearity ppm error at full scale, linear at zero and 140ppm NH3：+5 to -5
               Overgas limit maximum ppm for stable response to gas pulse： 200

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