• Sensitivity: 400 to 660 nA/ppm in 50ppm NO.
• Response Time: Less than 20 seconds to reach 90% of the final value from zero to 50ppm NO.
• Zero Current: 0 to +3 ppm equivalent in zero air.
• Resolution: RMS noise less than 0.15 ppm equivalent.
• Range: Performance warranty limit at 250 ppm NO.
• Linearity: Error at full scale is between -20 to -25 ppm.
• Overgas Range: Stable response to gas pulse up to 1200 ppm.

• Zero Drift: Not determined (nd) for ppm equivalent change/year in lab air.
• Sensitivity Drift: Not determined (nd) for % change/month in lab air.
• Operating Life: More than 24 months until 80% of the original signal is maintained.
• Temperature Sensitivity: 87 to 95% at -20°C and 97 to 105% at 50°C compared to 20°C at 50ppm NO.
• Zero Temperature Change: ±1 ppm at -20°C and 6 to 10 ppm at 50°C from 20°C.

• NO2: Less than 5% at 10ppm NO2.
• SO2: Less than 4% at 20ppm SO2.
• Cl2: Less than 5% at 10ppm Cl2.
• H2: Less than 0.1% at 400ppm H2.
• H2S: Less than 60% at 20ppm H2S.
• CO: Less than 0.1% at 400ppm CO.
• C2H4: Not determined (nd) at 400ppm C2H4.
• NH3: Less than 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 a sealed pot.
• Load Resistor: Recommended 10 to 100 Ω.
• Weight: Less than 13 g.

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

• Figure 1: Schematic Diagram of NO-B1 Sensor.
• Figure 2: Sensitivity Temperature Dependence shows variation in sensitivity due to temperature changes.
• Figure 3: Zero Temperature Dependence shows variation in zero output due to temperature changes.
• Figure 4: Response to 1200ppm NO demonstrates rapid response to gas concentrations.