• Sensitivity: 320 to 480 nA/ppm in 50ppm NO.
• Response Time: t90 < 20 seconds from zero to 50ppm NO.
• Zero Current: 3 ppm equivalent in zero air.
• Resolution: RMS noise < 0.2 ppm equivalent.
• Range: Performance warranty limit at 250 ppm NO.
• Linearity: Error at full scale, linear at zero and 50ppm NO, +32 to +36 ppm.
• Overgas Range: Maximum stable response to gas pulse at 800 ppm.
• Lifetime: Zero drift and sensitivity drift not determined (nd); operating life > 24 months until 80% original signal.

• Sensitivity at -20°C: 83 to 93% (output at -20°C/output at 20°C) at 50ppm.
• Sensitivity at 50°C: 101 to 105% (output at 50°C/output at 20°C) at 50ppm.
• Zero at -20°C: ±0.5 ppm equivalent change from 20°C.
• Zero at 50°C: 1 to 3 ppm equivalent change from 20°C.

• NO₂: < 5% at 50ppm NO₂.
• SO₂: < 2% at 20ppm SO₂.
• Cl₂: < 15% at 10ppm Cl₂.
• H₂: < 0.1% at 400ppm H₂.
• H₂S: < 15% at 20ppm H₂S.
• CO: < 0.1% at 400ppm CO.
• NH₃: < 0.1% at 20ppm NH₃.
• CO₂: 0% at 5% Vol CO₂.

• Bias Voltage: +300 mV.
• Temperature Range: -30 to 50°C.
• Pressure Range: 80 to 120 kPa.
• Humidity Range: 15 to 90% rh continuous.
• Storage Period: 6 months at 3 to 20°C in sealed pot.
• Load Resistor: Recommended 10 to 100 Ω.
• Weight: < 6 g.

All sensors are tested at ambient conditions with a 10 ohm load resistor unless otherwise stated. Customers should test under their own conditions to ensure suitability. Alphasense Ltd provides this information without legal responsibility.

• Figure 2: Shows sensitivity variation with temperature. Response time increases as temperature decreases.
• Figure 3: Shows zero output variation with temperature, expressed as ppm gas equivalent.
• Figure 4: Response time (t90) temperature dependence with mean and ±95% confidence intervals.