Benzene Detection Tubes (2 to 312 ppm)
Gastec Detection Tube No. 121S measures Benzene With a Range of 2-312 ppm.
- Measuring Range:
- 2 to 5 ppm - 4 pump strokes
Correction factor: 0.4
- 5 to 120 ppm - 2 pump strokes
Correction factor: 1
- 120 to 312 - 1 pump stroke
Correction factor: 2.6
- Sampling Time: 2 minutes per pump stroke
- Detecting Limit: 0.5 ppm (4 pump strokes)
- Changes from White to Dark Green
- Corrections for temperature & humidity: Unnecessary
- Relative Standard Deviation: 20% (for 5 to 40 ppm), 15% (for 40 to 120 ppm)
- 3 Year Shelf Life
- Reaction Principle: C6H6 + I2O5 + H2S2O7 → I2
- Store the tubes at a cool and dark place.
- Comes in a Box of 5 pretubes and 5 detector tubes
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Hexane |
≦ 100 ppm |
No |
No |
| Toluene |
≦ 200 ppm |
No |
No |
| Xyelene |
≦ 300 ppm |
No |
No |
Benzene Detection Tubes (2 to 312 ppm)
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