Monitors use the proven scientific principle of diffusion, which involves the gradual mixing of molecules of two or more substances.

• Formaldehyde monitor uses a bisulphite-impregnated filter and is analysed by colorimetry
• Can be used for eight-hour TWA sampling
• Does not have the sensitivity for short-term exposure limit (STEL) monitoring

Designed for measuring personal exposure in work areas in a variety of industries.

18-month shelf life.