GASTEC Carbon Monoxide (CO) Detector Tubes
GASTEC Carbon Monoxide Detector Tubes provide a fast, convenient method for measuring carbon monoxide (CO) concentrations directly at the sampling location. Designed for use with a compatible GASTEC gas sampling pump, these short-term detector tubes provide a direct-reading indication of carbon monoxide concentration through a visible color change and calibrated scale printed directly on the tube.
With measurement ranges extending from low-level 1–30 ppm measurements to concentrations as high as 1–50%, GASTEC offers multiple Carbon Monoxide tube configurations for industrial hygiene, workplace safety, environmental testing, process monitoring, indoor environments, and other applications where rapid on-site CO measurements are required.
Choose the Carbon Monoxide Detection Range for Your Application
GASTEC offers multiple CO detector tubes to accommodate different anticipated carbon monoxide concentrations. Selecting the appropriate tube allows users to target the measurement range that best matches the testing environment.
| GASTEC Tube No. | Carbon Monoxide Measuring Range |
|---|---|
| 1HH | 1–50% |
| 1H | 0.1–10% |
| 1M | 0.05–4% |
| 1LM | 25–2,000 ppm |
| 1L | 2.5–2,000 ppm |
| 1La | 8–1,000 ppm |
| 1LK | 5–600 ppm |
| 1LKC | 5–100 ppm |
| 1LL | 5–50 ppm |
| 1LC | 1–30 ppm |
Direct-Reading Carbon Monoxide Measurement
GASTEC detector tubes are thin glass tubes containing detection reagents selected for the target gas. When a measured volume of air is drawn through the appropriate Carbon Monoxide Detector Tube, the reagent produces a distinct color-change layer. The carbon monoxide concentration can then be determined using the calibrated scale printed directly on the tube.
This direct-reading approach provides a practical solution for applications where professionals need carbon monoxide measurements in the field without relying on complex analytical equipment.
Multiple Ranges for Low and High CO Concentrations
The broad selection of GASTEC Carbon Monoxide Tubes allows users to choose a tube for the expected concentration instead of relying on a single general-purpose range. Low-range options such as the 1LC (1–30 ppm), 1LL (5–50 ppm), and 1LKC (5–100 ppm) are available for lower CO concentrations, while options such as the 1H (0.1–10%) and 1HH (1–50%) extend measurement capabilities into much higher concentration ranges.
Key Features
- Designed specifically for carbon monoxide (CO) measurement
- Multiple measurement ranges available from 1–30 ppm through 1–50%
- Direct-reading colorimetric measurement system
- Calibrated scale printed directly on the detector tube
- Designed for rapid on-site measurements
- Multiple tube numbers available for different expected CO concentrations
- Measurement range can be extended on applicable tubes by adjusting sampling volume according to GASTEC instructions
- Each GASTEC detector tube production lot is independently tested and calibrated
- Suitable for professional industrial, environmental, safety, and process-monitoring applications
Common Applications
- Carbon monoxide measurement
- Industrial hygiene testing
- Workplace air monitoring
- Indoor environment testing
- Industrial safety programs
- Environmental field testing
- Combustion-related investigations
- Process monitoring
- Maintenance and troubleshooting
- Occupational exposure investigations
- Field screening for carbon monoxide
GASTEC Gas Detection Equipment from Activated Carbon Depot
Activated Carbon Depot supplies GASTEC detector tubes and gas sampling equipment for industrial hygienists, safety professionals, environmental consultants, laboratories, maintenance teams, and industrial facilities. With multiple Carbon Monoxide Detector Tube ranges available, customers can select the appropriate GASTEC tube for both low-level CO measurements and applications involving significantly higher carbon monoxide concentrations.
Ways to Contact Us
Activated Carbon Depot
Email: sales@activatedcarbondepot.com
Phone: 949-229-2587




