Description
Dräger Tubes For Short Term Measurements: Chromic Acid 0.1/a
Dräger Safety offer a massive range of short-term gas detection tubes for the measurement of various gases. This particular set of tubes is for (Chromic Acid 0.1/a).
The tubes come in a pack of 9 tubes and have a shelf life of 2 years.
| Part no | Dräger Tube | Substance | Measurement Range |
| 6728681 | Chromic Acid 0.1/a | Chromic Acid | 0.1 to 0.5 mg/m3 |
| Sodium Chromate | 0.1 to 0.5 mg/m3 | ||
| Sodium Chromate | 0.2 to 1 mg/m3 | ||
| Zinc Chromate | 0.2 to 1 mg/m3 |
Application Range:
| Standard Measuring Range: | 0.1 to 0.5 mg/m3 Discoloration compared to color standard. |
| Number of Strokes n: | 40 |
| Time for Measurement: | approx. 8 min |
| Standard Deviation: | ± 50 % |
| Colour Change: | white to violet |
Ambient Operating Conditions:
| Temperature: | 5 to 40 °C |
| Absolute Humidity | < 20 mg H2O / L |
Reaction Principle:
a) CrO3 + H2SO4 ~> CrVI b) CrVI + diphenylcarbazide ~> CrIII + diphenylcarbazone
Cross Sensitivity:
Metal chromates such as zinc or strontium chromate are indicated with about half the sensitivity. CrIII compounds do not affect the indication. Very high chromate concentrations lead to a rapid bleaching of the indication. Measurements should be repeated with less strokes..
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