Performance
| Measuring Range |
5 to 1500 ppm
|
| Sampling Hours |
1 to 10 hours
|
| Detecting Limit |
5 ppm (10 hours)
|
| Colour Change |
Yellow → Reddish Brown
|
| Reaction Principle |
CH3COCH3 + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
| Coefficient of Variation |
10% (for 50 to 1500 ppm-hr) |
| 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 |
| Aldehydes,Ketones |
|
+ |
Reddish brown |
| Acid gases |
|
+ |
Reddish brown
(Unclear demarcation) |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
Measuring Range |
| Methyl ethyl ketone |
1.3 |
0.5 to 1950 ppm |
| Methyl isobutyl ketone |
2.3 |
11.5 to 3450 ppm |
| Acetaldehyde |
0.8 |
4 to 1200 ppm |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 500 ppm |
750 ppm |
2.1 to 13% |
