Range 0.01 to 1.0 ppm; sensitivity to better than 0.01 ppm sulfur dioxide; precision 2 pct.; operating temp 10 to 110 degrees f; cabinet dimensions 9 in. W, 10 in. H, 16 in. D; power pac dimensions 5 in. W, 7 in. H, 6 in. D; dry detection via flame photometric detector