4nd citicel nitrogen dioxide sensor key features & benefits , industry leading reliability , improved performance variability 4nd citicel nitrogen dioxide sensor application Industrial safety: sensors for portable gas detectors used in industrial hygiene and confined space entry. 4nd citicel nitrogen dioxide sensor performance characteristics , nominal range: 0-20 ppm , expected operating life: two years in air , output signal: 0.6 , ± 0.15 ua/ppm , resolution: 0.1 ppm , repeatability:
