Gastec Hydrogen Sulphide (H_2S) Detector Tube – No. 4LL

Accurate Low-Level Gas Detection in Seconds

The Gastec No. 4LL detector tube is a world-class solution for the rapid measurement of Hydrogen Sulphide ($H_2S$) in the air. Known for its high sensitivity and "Extra Low" detection range, this tube is an essential safety tool for identifying toxic gas presence in industrial environments before it becomes a hazard. Manufactured in Japan, these tubes are recognized globally for their precision and ease of use.

Key Features

• Ultra-Sensitive Range: Specifically designed to detect H_2S concentrations starting from as low as 0.25 ppm, providing critical early warnings.

• Direct Reading: The clear, printed scale on the glass tube allows for immediate results without the need for laboratory analysis or electronic calibration.

• Rapid Response: Provides a clear colorimetric change (White to Brown) for easy visual confirmation of gas levels.

• Extended Reach: Available for use with a 30-meter extension hose, making it ideal for sampling confined spaces or deep tanks safely.

• Long Shelf Life: High-quality chemical reagents ensure stability and reliability when stored correctly.

Technical Specifications