Benzene Detection Tubes (0.2 to 66 ppm)Gastec Detection Tube No. 121SP measures Benzene with a Range of 0.2 to 66 ppm.
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Measuring Range:
- 0.2 to 20 ppm - 3 pump strokes
Correction factor: 1
- 20 to 66 ppm - 1 pump stroke
Correction factor: 3.3
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Sampling Time: 2 minutes per pump stroke
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Detecting Limit: 0.1 ppm (3 pump strokes)
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Color Change: White to Brown
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Corrections for temperature & humidity: Unnecessary
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Relative Standard Deviation: 10% (for 0.2 to 5ppm) , 5% (for 5 to 20 ppm)
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2 Year Shelf Life
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Reaction Principle:
- 2C6H6 + HCHO → C6H5 - CH2 - C6H5
- C6H5 - CH2 - C6H5 + H2S2O7 → Reaction product
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Store the tubes at a cool and dark place
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Comes in a box of 5 detector tubes and 5 pre tubes

- On-site measurements can be performed easily by anybody, anytime and anywhere, in a short time
- Easy-to-check direct reading possible due to calibrated scale directly printed on the tube
- An extensive measuring range can be obtained by adjusting the sampling volume
- In order to assure high precision, each production lot is tested and calibrated independently, Each detector tube has its own quality control number printed on the tube
- Long shelf-life with excellent long-term stability
TUBE NAME |
Aromatic Hydrocarbon |
CHEMICAL FORMULA |
C6H6 |
MEASURING RANGE |
0.2-66ppm |
NO. TESTS PER BOX |
5 |
STORAGE |
Store tubes in a cool dark place |
TUBE NUMBER |
121SP |