GASTEC Nitrogen Oxides (NOx) Detector Tubes – Multiple Measurement Ranges

GASTEC Nitrogen Oxides (NOx) Detector Tubes

GASTEC Nitrogen Oxides Detector Tubes provide a convenient, direct-reading method for measuring nitrogen oxides (NOx) 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 NOx measurements across a broad range of concentrations.

With available measurement ranges extending from 0.04–16.5 ppm to 50–2,500 ppm, GASTEC offers multiple Nitrogen Oxides Detector Tube options for applications ranging from low-level air monitoring and industrial hygiene investigations to higher-concentration industrial and process measurements.

Choose the Nitrogen Oxides Detector Tube for Your Application

GASTEC offers multiple Nitrogen Oxides Detector Tubes designed for different NOx concentration ranges. Select the appropriate GASTEC product number based on the anticipated nitrogen oxides concentration and the requirements of your sampling application.

GASTEC Product Number	Nitrogen Oxides Measurement Range
11HA	50–2,500 ppm
11S	5–625 ppm
11L	0.04–16.5 ppm

 

Direct-Reading Colorimetric NOx Measurement

GASTEC detector tubes use chemical detection reagents that respond to the target gas as a measured volume of sample is drawn through the tube system. The resulting color-change layer provides a visual indication that can be used to determine nitrogen oxides concentration according to the calibrated scale and measurement instructions for the selected GASTEC product number.

This direct-reading approach provides a practical solution for spot measurements, industrial hygiene surveys, process checks, combustion-related investigations, environmental testing, maintenance, and troubleshooting where NOx concentrations need to be evaluated directly at the sampling location.

NOx Detector Tubes for Low to High Concentrations

For applications requiring sensitive low-level measurements, the GASTEC 11L (0.04–16.5 ppm) provides the lowest concentration range in this product selection. This makes it useful when relatively small concentrations of nitrogen oxides need to be measured.

The GASTEC 11S (5–625 ppm) provides a broader intermediate measurement range, while the GASTEC 11HA (50–2,500 ppm) extends measurement capabilities to substantially higher NOx concentrations. Together, these three options allow users to select a detector tube that more closely matches the anticipated conditions of the sampling environment.

Key Features

• Designed for nitrogen oxides (NOx) measurement
• Three GASTEC product and measurement range options available
• Available ranges from 0.04–16.5 ppm through 50–2,500 ppm
• Options for low, intermediate, and higher NOx concentrations
• Direct-reading colorimetric gas measurement method
• Designed for rapid on-site measurements and field screening
• Compact and portable gas measurement solution
• No electronic gas sensor or electrical power required at the detector tube
• Suitable for professional industrial, environmental, and occupational monitoring
• Designed for use with compatible GASTEC gas sampling equipment

Common Applications

• Nitrogen oxides concentration measurement
• NOx air monitoring
• Industrial hygiene investigations
• Workplace air monitoring
• Combustion-related testing
• Industrial process monitoring
• Environmental air investigations
• Manufacturing facilities
• Boiler and combustion system investigations
• Maintenance and troubleshooting
• Occupational exposure investigations
• Field screening for nitrogen oxides

Important Range Selection Information

Nitrogen oxides concentrations can vary significantly between applications, making selection of the appropriate detector tube important. Individual GASTEC product numbers may have different sampling procedures, sample volumes, pump strokes, sampling times, temperature considerations, pretreatment requirements, interfering gases, and correction factors. Always follow the instructions supplied with the specific GASTEC Nitrogen Oxides Detector Tube being used.

GASTEC Detector Tubes for Professional NOx Measurement

Activated Carbon Depot supplies GASTEC detector tubes and compatible gas sampling equipment for industrial hygienists, safety professionals, environmental consultants, laboratories, maintenance personnel, process operators, and industrial facilities. With three Nitrogen Oxides Detector Tube options covering concentrations from 0.04 ppm through 2,500 ppm, users can select the GASTEC product number and measurement range that best matches their NOx testing requirements.