GASTEC Chlorine (Cl2) Detector Tubes
GASTEC Chlorine Detector Tubes provide a convenient, direct-reading method for measuring chlorine (Cl2) concentrations in air and gas samples. Designed for use with a compatible GASTEC gas sampling pump, these colorimetric detector tubes allow professionals to perform rapid on-site chlorine measurements across a broad range of concentrations.
With available measurement ranges extending from 0.025–2 ppm to 0.25–10% chlorine, GASTEC offers multiple Cl2 detector tube options for applications ranging from low-level industrial hygiene and workplace air monitoring to high-concentration industrial and process measurements.
Choose the Chlorine Detector Tube for Your Application
GASTEC offers multiple Chlorine Detector Tubes designed for different Cl2 concentration ranges. Select the appropriate GASTEC product number based on the anticipated chlorine concentration and the requirements of your sampling application.
| GASTEC Product Number | Chlorine Measurement Range |
|---|---|
| 8HH | 0.25–10% |
| 8H | 25–1,000 ppm |
| 8LA | 0.1–16 ppm |
| 8LL | 0.025–2 ppm |
Direct-Reading Colorimetric Chlorine Measurement
GASTEC detector tubes use chemical detection reagents that react with the target gas as a measured volume of sample is drawn through the tube. The resulting color change provides a visual indication of chlorine concentration. The concentration can then be determined using the calibrated scale on the detector tube and the sampling instructions specified for the selected GASTEC product number.
This direct-reading approach provides a practical solution for spot measurements, workplace assessments, industrial hygiene surveys, process checks, environmental investigations, and maintenance applications where chlorine concentrations need to be evaluated directly at the sampling location.
Chlorine Detector Tubes for Low to High Concentrations
The selection of GASTEC Chlorine Tubes allows users to choose a measurement range that more closely matches anticipated conditions. For low-level Cl2 measurements, the GASTEC 8LL (0.025–2 ppm) provides the lowest available measurement range in this selection. The GASTEC 8LA (0.1–16 ppm) extends measurement capability across a broader low-ppm range.
For higher chlorine concentrations, the GASTEC 8H (25–1,000 ppm) provides measurement capability into the thousands-of-ppm range. For applications involving percentage-level chlorine concentrations, the GASTEC 8HH (0.25–10%) provides the highest concentration range in this product selection.
Key Features
- Designed specifically for chlorine (Cl2) measurement
- Four GASTEC product and measurement range options available
- Measurement ranges available in both ppm and percent Cl2
- Available ranges from 0.025–2 ppm through 0.25–10%
- Direct-reading colorimetric gas detection method
- Calibrated detector tube scale for determining chlorine concentration
- Options for low, medium, and high chlorine concentrations
- Designed for rapid on-site measurements and field screening
- No electronic sensor or electrical power required at the detector tube
- Compact and portable solution for professional gas measurement
- Designed for use with a compatible GASTEC gas sampling pump
Common Applications
- Chlorine concentration measurement
- Industrial hygiene investigations
- Workplace air monitoring
- Water and wastewater treatment facilities
- Chlorination system monitoring
- Chemical processing facilities
- Industrial process monitoring
- Manufacturing operations
- Environmental field testing
- Maintenance and troubleshooting
- Occupational exposure investigations
- Field screening for Cl2
Important Range Selection Information
Chlorine concentrations can vary substantially between applications, making proper detector tube selection important. Individual GASTEC product numbers may require different sample volumes, pump strokes, sampling times, temperature corrections, or other measurement procedures. Potential interfering gases may also vary by tube. Always follow the instructions supplied with the specific GASTEC Chlorine Detector Tube being used.
GASTEC Detector Tubes for Professional Chlorine Measurement
Activated Carbon Depot supplies GASTEC detector tubes and gas sampling equipment for industrial hygienists, safety professionals, environmental consultants, water and wastewater professionals, laboratories, maintenance teams, and industrial facilities. With four Chlorine Detector Tube options covering low-level ppm measurements through percentage-level Cl2 concentrations, users can select the GASTEC product number and measurement range that best matches their gas testing application.
Ways to Contact Us
Activated Carbon Depot
Email: sales@activatedcarbondepot.com
Phone: 949-229-2587




