This month's Safety E-Book topic highlight is: Area Monitoring.
Indoor and outdoor gas hazards that exist in open areas are usually monitored using diffusion-type sensors.
This sensor type has no active sample-drawing system; it relies on the ambient air movement and pressure to deliver the sample to the sensing element. When being installed, the weight of the sample in relation to ambient air is important, and will determine sensor placement.
Diffusion sensors are a reliable and cost-effective way to monitor open area gas hazards.