Research Article

Virtual Instrument for Emissions Measurement of Internal Combustion Engines

Table 1

Sensors characteristics and operating ranges.

FeaturesOperating conditions
SO2NOO2COCO2

Operating ranges0–2000 ppm0–250 ppm0–30% O20–500 ppm0–100% Vol.
ModelEC4-2000-SO2 EC4-250-NOEC410EC4-500-COIR11BR
Sensitivity8–20 nA/ppm SO2320–480 nA/ppm NON/A55–85 nA/ppm CON/A
Maximum overloadN/A1000 ppm100% O21500 ppm CON/A
Zero in air at 20°C<±50 ppm SO2−0.06 To 4.5 ppm NON/A<±3.1 ppm of CON/A
Zero deviation (−20 to +40°C)0 to 4 ppm SO2N/AN/AN/AN/A
Resolution5 ppm SO20.5 ppm NO0.1% O21 ppm CON/A
Response time90 < 60 s90 = 35 s90 < 15 s90 < 30 sN/A
Temperature range−20 to +50°C−20 to +50°C−20 to +50°C−20 to +50°C−20 to +50°C
Operating humidity15–90% RH noncondensing15–90% RH noncondensing15–95% RH15–90% RH noncondensing0–99% noncondensing
Pressure range90–110 kPa90–110 kPa 90–110 kPa 90–110 kPa 80–120 kPa.
DC supply recommendedN/AN/AN/AN/A5 V