Indicator: 1 ~ 15 mg/m^3
Measuring Range: 1 ~ 15 mg/m^3, Number of Pump Strokes 1
Sampling Time: 20 minute per pump stroke
Colour Change:
+ TBM tube: Yellow → Pink
+ DMS tube: Pink → Pale yellow
Reaction Principle:
+ (CH3)3CSH + HgCl2 → (CH3)CSHgCl + HCl,
+ HCl + Base → Chloride compound,
+ (CH3)2S + KMnO4 (Pink) → Pale yellow product
Coefficient of Variation: 10% (for 1 to 5 mg/m^3), 5% (for 5 to 15 mg/m^3)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance (Simultaneous detector tube)
| Detector Tube |
|
| Measuring Range |
| 1 to 15 mg/m3 |
1 to 15 mg/m3 |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.2 mg/m3 (n=1) |
| Colour Change |
| Yellow → Pink |
Pink → Pale yellow |
|
| Reaction Principle |
(CH3)3CSH + HgCl2 → (CH3)CSHgCl + HCl
HCl + Base → Chloride compound
(CH3)2S + KMnO4 (Pink) → Pale yellow product |
| Coefficient of Variation |
10% (for 1 to 5 mg/m3), 5% (for 5 to 15 mg/m3) |
| 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)
| TBM Tube |
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Hydrogen sulphide |
|
+ |
Pink |
| Mercaptans |
|
+ |
Pink |
| DMS Tube |
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Olefins |
|
+ |
Pale yellow |
| Tetrahydrothiophene |
|
+ |
Pale yellow |
| Calibration gas generation |
TBM Tube:Diffusion tube method
DMS Tube:Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| DMS:10ppm(2014) |
- |
- |
