Table 5. Specifications for the AVL-DI GAS 444 Gas Analyzer and AVL 437 Smoke Meter.
| gas analyzer AVL-DI GAS 444 | |||
|---|---|---|---|
| emissions | measurement principle | resolutions | ranges |
| CO | NDIR | 0.01 vol % | >10 vol % |
| HC | NDIR | >10 ppm | >20 000 ppm |
| NOX | electrochemical | 1 ppm | >5000 ppm |
| AVL 437C Smoke Meter Measuring Principle: Smoke Opacity Technique | |||
| range (for measuring) | 0–100 (HSU) | ||
| temperature (smoke) | 2500 °C (maximum at entering) | ||
| temperature (ambient) | >50 °C | ||
| humidity | 90% at 50 °C (nonconditioning) | ||
| power supply | 11.5–36 V DC | ||