UK Alphasense dual gas carbon monoxide/hydrogen sulfide sensor (CO/H2S sensor) - CO/H2S-D2

I.CO/H2S-D2 Carbon monoxide/hydrogen sulfide sensor (CO/H2S sensor) product description: 
The dual gas carbon monoxide/hydrogen sulfide sensor (D2 type sensor) provides a special approach in terms of external dimensions and electrode structure. A high-capacity filter is used on the carbon monoxide working electrode to completely eliminate cross-sensitivity of the channel to hydrogen sulfide, acid gases, and similar gases like sulfur dioxide and nitrogen oxides. In portable instrument designs, using the D2 series sensors allows precise factory-level, maintenance-level, and field-level calibration with mixed gases, without worrying about incorrect calibration of the CO channel.

II. Technical parameters of the carbon monoxide channel:
Resolution: 1ppm
Response time t90: <25s
Measurement range: 1000 ppm
Zero current: < +/-6
Sensitivity: 34–55nA/ppm @ 22C, 400ppm CO
Linearity: 40ppm / linearity error at full scale (zero, 400ppm)
Overload range: 5,000ppm / maximum concentration of stable response gas pulse

III. Technical parameters of the hydrogen sulfide channel:
Resolution: 0.25ppm
Response time t90: <30s
Measurement range: 100 ppm
Zero current: < +/-0.6
Sensitivity: 90–150nA/ppm @ 22C, 20ppm H2S
Linearity: -9ppm / linearity error at full scale (zero, 20ppm)
Overload range: 400ppm / concentration of stable response gas pulse