n-Butanol 10/a (10) Cross Sensitivity The tube does not differentiate between different alcohols. 2-butanol is indicated with the same sensitivity. During the measurement of isobutanol with n = 2/10 strokes, the concentration read must be multiplied by a factor of 0.4. During the measurement of tert-butanol with n = 2/10 strokes, the concentration read must be multiplied by a factor of 3.0. Methanol is indicated with 2 times (n=10) to 3 times (n=2) its sensitivity. Ethanol and isopropanol are indicated with 1 time (n=10) to 2 times (n=2) their sensitivity. Higher molecular alcohols are indicated with significantly decreasing sensitivity. Ethers are indicated with a different sensitivity. &le, 25 ppm formaldehyde, &le, 50 ppm acetaldehyde, and &le, 50 ppm toluene are not indicated. Aliphatic petroleum hydrocarbons, ketones, esters, halogenated hydrocarbons and benzene are not indicated. This Tube will replace Alcohol 25/a (8101631)