Gastec Formaldehyde (HCHO) Detector Tube – No. 91LL

High-Sensitivity Detection for Indoor Air Quality & Occupational Safety

The Gastec No. 91LL detector tube is an advanced tool for the rapid measurement of Formaldehyde (HCHO). Designed for "Extra Low" concentration levels, this tube allows safety officers and laboratory technicians to detect even trace amounts of this toxic gas. Manufactured in Japan to rigorous standards, it provides immediate, on-site results to ensure compliance with health and safety regulations.

Key Features

• Ultra-Low Detection: Optimized for trace analysis with a measurement range of 0.05 to 1.0 ppm.

• Direct Reading Scale: Features a clear, pre-calibrated scale on the glass for instant concentration readings without electronic equipment.

• Rapid Safety Assessment: Provides a distinct colorimetric change (Yellow \rightarrow Reddish Brown) for easy visual confirmation of gas presence.

• Quality Assured: Each box is manufactured under strict Japanese quality control (QC No. 51012) for consistent performance.

• Extension Ready: Compatible with Gastec 30-meter extension hoses for sampling air in restricted or hard-to-reach areas.

Technical Specifications