GASTEC Hydrogen Sulphide (H2S) Detector Tubes – Multiple Measurement Ranges

GASTEC Hydrogen Sulphide (H2S) Detector Tubes

GASTEC Hydrogen Sulphide Detector Tubes provide a convenient, direct-reading method for measuring hydrogen sulphide (H2S) 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 H2S measurements across a wide range of concentrations.

With available measurement ranges extending from 0.05–4.0 ppm to 1–40% hydrogen sulphide, GASTEC offers multiple H2S detector tube options for applications ranging from low-level industrial hygiene and environmental measurements to high-concentration industrial and process testing.

Choose the Hydrogen Sulphide Detector Tube for Your Application

GASTEC offers multiple Hydrogen Sulphide Detector Tubes designed for different H2S concentration ranges. Select the appropriate GASTEC product number based on the anticipated hydrogen sulphide concentration and the requirements of your sampling application.

GASTEC Product Number	Hydrogen Sulphide Measurement Range
4HT	1–40%
4HP	0.25–20%
4HH	0.1–4%
4H	10–4,000 ppm
4HM	25–1,600 ppm
4M	12.5–500 ppm
4L	1–240 ppm
4LL	0.25–120 ppm
4LK	1–40 ppm
4LB	0.5–12 ppm
4LT	0.05–4.0 ppm

Direct-Reading Colorimetric H2S 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 hydrogen sulphide concentration. The measurement is determined using the calibrated scale on the detector tube along with the sampling and correction instructions specified for the selected GASTEC product number.

This direct-reading approach provides a practical method for performing spot measurements and field screening without relying on laboratory analysis. The compact tube-and-pump system is particularly useful for industrial hygiene surveys, process checks, environmental investigations, maintenance work, and troubleshooting where H2S concentrations need to be evaluated directly at the sampling location.

H2S Detector Tubes from 0.05 ppm to 40%

The extensive selection of GASTEC Hydrogen Sulphide Tubes allows users to choose a measurement range that closely matches anticipated conditions. For very low concentrations, the GASTEC 4LT (0.05–4.0 ppm) provides the lowest available range in this product selection. Additional lower-range options include the 4LB (0.5–12 ppm), 4LK (1–40 ppm), 4LL (0.25–120 ppm), and 4L (1–240 ppm).

For higher ppm concentrations, options include the 4M (12.5–500 ppm), 4HM (25–1,600 ppm), and 4H (10–4,000 ppm). For applications involving much higher H2S concentrations, GASTEC offers percentage-range tubes including the 4HH (0.1–4%), 4HP (0.25–20%), and 4HT (1–40%).

Key Features

• Designed specifically for hydrogen sulphide (H2S) measurement
• Eleven GASTEC product and measurement range options available
• Measurement ranges available in both ppm and percent H2S
• Overall available measurement ranges from 0.05–4.0 ppm through 1–40%
• Direct-reading colorimetric gas detection method
• Calibrated detector tube scale for determining H2S concentration
• Multiple ranges for low, medium, high, and very high H2S concentrations
• Designed for rapid on-site measurements and field screening
• No electronic sensor or electrical power required at the detector tube
• Compact and portable gas measurement solution
• Designed for use with a compatible GASTEC gas sampling pump

Common Applications

• Hydrogen sulphide concentration measurement
• Industrial hygiene investigations
• Workplace air monitoring
• Wastewater treatment facilities
• Sewage and sewer system investigations
• Oil and gas operations
• Petroleum and petrochemical facilities
• Industrial process monitoring
• Environmental field testing
• Biogas and anaerobic digestion applications
• Pulp and paper facilities
• Maintenance and troubleshooting
• Occupational exposure investigations

Important Range Selection Information

Because hydrogen sulphide concentrations can vary significantly between applications, users should select a detector tube appropriate for the anticipated concentration before sampling. Each GASTEC product number may have its own sampling volume, number of pump strokes, sampling time, temperature considerations, interfering gases, and correction requirements. Always follow the instructions supplied for the specific detector tube being used.

GASTEC Detector Tubes for Professional H2S Measurement

Activated Carbon Depot supplies GASTEC detector tubes and gas sampling equipment for industrial hygienists, safety professionals, environmental consultants, wastewater professionals, laboratories, maintenance teams, and industrial facilities. With eleven Hydrogen Sulphide Detector Tube options covering concentrations from low-level ppm measurements through high percentage-level H2S, users can select the GASTEC product number that best matches their specific gas measurement application.