Methylene Chloride Detection Tubes (20 to 500 ppm)
Gastec Detection Tube No. 138 measures Methylene Chloride with a Range of 20 to 500 ppm.
- Measuring Range: 20 to 50 ppm, 50 to 500 ppm
- Number of Pump Strokes: 2, 1
- Correction Factor: 0.4, 1
- Sampling Time: 3 minutes per pump stroke
- Detecting Limit: 10 ppm (2 pump strokes)
- Corrections for temperature & humidity: Temperature Correction is necessary
- Reaction Principle:
- CH2Cl2 + CrO3 + H2S2O7 → Cl2
- Cl2 + 3,3',5,5'-Tetramethylbenzidine → Pale pink product
- Relative Standard Deviation: 15% (for 50 to 100 ppm), 10% (for 100 to 500 ppm)
- Changes from White to Pale Pink
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
- Comes in a Box of 5 pre tubes and 5 detector tubes
Possible coexisting substances and their interferences:
| Substance |
Interference |
Changes color by itself |
| Chlorine, Bromine, Iodine |
+ |
Pale pink |
| Unsatruated halogenated HCs |
+ |
Pale pink |
| Saturated halogenated HCs |
+ |
Pale pink |
Other substance measurable with this detector tube:
| Substance: |
Correction Factor: |
No. of Pump Strokes: |
Measuring Range: |
| Ethyl Chloride |
0.3 |
1 |
15 to 150 ppm |
Methylene Chloride Detection Tubes (20 to 500 ppm)
There are no reviews yet.