User Manual for Gastec 126L Chlorobenzene Detector Tube

Quick guide from the manual

The Gastec 126L Chlorobenzene Detector Tube is designed for detecting Chlorobenzene in air or industrial atmospheric conditions. It must be used in conjunction with a Gastec Gas Sampling Pump. The tube features a specific measuring range depending on the number of pump strokes: 0.5-10 ppm (3 strokes) or 10-57 ppm (1 stroke). Always verify the expiration date on the box before use.

Safety precautions

• Warning: Use only Gastec detector tubes with Gastec pumps. Using non-Gastec parts may result in property damage, serious injury, or death and voids all warranties.
• Handling: When breaking the tube ends, keep them away from your eyes. Do not touch broken glass or the reagent with bare hands.
• Disposal: The reagent contains a small amount of lead. Dispose of the tubes according to local government regulations, regardless of whether they have been used.

Specifications

• Measuring Range: 0.5-10 ppm (3 pump strokes) or 10-57 ppm (1 pump stroke).
• Sampling Time: 1.5 minutes per pump stroke.
• Temperature Range: 0 - 40°C (32 - 104°F).
• Humidity Range: 0 - 90% relative humidity.
• Reaction Principle: Chlorobenzene reacts with PbO2 and H2SO4 to produce HCl, which then reacts with a base to form Chloride.

Measurement procedure

1. Check the pump for leakage by inserting a fresh sealed detector tube. Follow the pump's operating manual.
2. Break the tips off a fresh detector tube using the pump's tip breaker.
3. Insert the tube into the pump inlet, ensuring the arrow on the tube points toward the pump.
4. Align the guide mark on the pump body with the guide mark on the handle.
5. Pull the handle all the way out until it locks (100 mL). Wait 1.5 minutes and confirm sampling completion. Repeat this two more times for the 0.5-10 ppm range.
6. For concentrations higher than 10 ppm, use a fresh tube and perform only one pump stroke.
7. Read the concentration level at the interface where the stained reagent meets the unstained reagent.
8. Apply temperature or pressure corrections if necessary using the provided formulas and tables.

Interferences

The following gases may cause interference and result in false positive readings: Chlorine, Hydrogen chloride, Trichloroethylene, and Tetrachloroethylene. The test result may be affected by other substances not listed; contact Gastec representatives for more information.