Research Article
Virtual Instrument for Emissions Measurement of Internal Combustion Engines
Table 1
Sensors characteristics and operating ranges.
| Features | Operating conditions | SO2 | NO | O2 | CO | CO2 |
| Operating ranges | 0–2000 ppm | 0–250 ppm | 0–30% O2 | 0–500 ppm | 0–100% Vol. | Model | EC4-2000-SO2 | EC4-250-NO | EC410 | EC4-500-CO | IR11BR | Sensitivity | 8–20 nA/ppm SO2 | 320–480 nA/ppm NO | N/A | 55–85 nA/ppm CO | N/A | Maximum overload | N/A | 1000 ppm | 100% O2 | 1500 ppm CO | N/A | Zero in air at 20°C | <±50 ppm SO2 | −0.06 To 4.5 ppm NO | N/A | <±3.1 ppm of CO | N/A | Zero deviation (−20 to +40°C) | 0 to 4 ppm SO2 | N/A | N/A | N/A | N/A | Resolution | 5 ppm SO2 | 0.5 ppm NO | 0.1% O2 | 1 ppm CO | N/A | Response time | 90 < 60 s | 90 = 35 s | 90 < 15 s | 90 < 30 s | N/A | Temperature range | −20 to +50°C | −20 to +50°C | −20 to +50°C | −20 to +50°C | −20 to +50°C | Operating humidity | 15–90% RH noncondensing | 15–90% RH noncondensing | 15–95% RH | 15–90% RH noncondensing | 0–99% noncondensing | Pressure range | 90–110 kPa | 90–110 kPa | 90–110 kPa | 90–110 kPa | 80–120 kPa. | DC supply recommended | N/A | N/A | N/A | N/A | 5 V |
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