Measuring Range
2 to 30 ppm 30 to 75 ppm
Number of Pump Strokes
4 2
Correction Factor
1 2.5
Sampling Time 2 minutes per pump stroke
Detecting Limit 0.2 ppm (n=4)
Colour Change Pale Yellow → Yellow
Reaction Principle Cyclohexanone reacts with 2,4-dinitrophenylhydrazine to form dinitropnenylhydrazone to produce yellow in colour.
Coefficient of Variation 10% (for 2 to 10 ppm), 5% (for 10 to 30 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Ketones   + Yellow
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Furfural 1.0 4 2 to 30 ppm
Diacetone alcohol by scale 2 2.5 to 100 ppm
Isophorone 1.0 8 2 to 30 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
25 ppm - 1.1 to 9.4%

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