Petroleum Naphtha Detection Tubes (0.5 to 28 mg/l)
Gastec Detection Tube No. 5LC measures Sulfur Dioxide with a Range of 0.1 to 25 ppm.
- Measuring Range:
- 0.5 to 1 mg/l
- 1 to 14 mg/l
- 14 to 28 mg/l
- No. of Pump Strokes: 2, 1, 1/2
- Correction Factor: 1/2, 1, 2
- Sampling time: 45 seconds per pump stroke
- Detecting Limit: 0.1 mg/l (2 pump strokes)
- Color Change: Yellowish brown to Greenish brown
- Corrections for temperature & humidity: Unnecessary
- Reaction principle: Petroleum naphtha + Cr6+ + H2SO4 ? Cr3+
- Relative Standard Deviation: 10 % (for 1 to 4 mg/l), 5 % (for 4 to 14 mg/l)
- 3 Year Shelf Life
- Store the tubes at a cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Acetylene |
? 3 % |
+ |
Blackish brown (whole layer) |
| Propane |
? 0.2 % |
+ |
Blackish brown (whole layer) |
| Hydrogen sulfide |
? 500 ppm |
+ |
Blackish brown |
| Organic solvents |
|
+ |
Greenish brown |
| Sulfur dioxide |
? 500 ppm |
+ |
Green |
Other substance measurable with this detector tube:
| Substance: |
Correction Factor: |
No of Pump Strokes: |
Measuring Range:
mg/l |
| Petroleum benzine |
2
1
0.5 |
1/2
1
2 |
14 to 28
1 to 14
0.5 to 1 |
| Petroleum ether |
2
1
0.5 |
1/2
1
2 |
14 to 28
1 to 14
0.5 to 1 |
Petroleum Naphtha Detection Tubes (0.5 to 28 mg/l)
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| Substance |
Concentration |
Interference |
Changes color by itself to |
| Acetylene |
? 3 % |
+ |
Blackish brown (whole layer) |
| Propane |
? 0.2 % |
+ |
Blackish brown (whole layer) |
| Hydrogen sulfide |
? 500 ppm |
+ |
Blackish brown |
| Organic solvents |
|
+ |
Greenish brown |
| Sulfur dioxide |
? 500 ppm |
+ |
Green |
Other substance measurable with this detector tube:
| Substance: |
Correction Factor: |
No of Pump Strokes: |
Measuring Range:
mg/l |
| Petroleum benzine |
2
1
0.5 |
1/2
1
2 |
14 to 28
1 to 14
0.5 to 1 |
| Petroleum ether |
2
1
0.5 |
1/2
1
2 |
14 to 28
1 to 14
0.5 to 1 |
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