Choosing the right fume hood is crucial to ensuring safety from dangerous chemicals and vapors in your lab. The process of researching and purchasing the right lab hood can seem overwhelming. We are here to help. Below are important questions and considerations to help you choose the right fume hood for your lab. Give us a call to speak with one of our product specialists or feel free to send an email, or reach out on live chat. Terra manufactures and stocks fume hoods in Fullerton, CA and distributes industry-leading models by Labconco.
Activated charcoal, the most common purification filtration medium, adsorbs chemicals with a molecular weight above 30 and a boiling point above 60°C. Carbon filters are also effective with many other chemicals because of their particular molecular structure.
Adsorption takes place in the active filter zone, the small cross-section of the filter bed in which the material to be removed comes in contact with the filtering medium (see illustration). This active filter zone moves upward as the filter becomes saturated. When it reaches the filter's top surface, there is an initial breakthrough by the contaminant gas; thereafter the percentage of contaminant gas that escapes filtration increases until total saturation of the filter is reached.
Whether you’re using a laboratory hood to limit exposure to chemical fumes or you require a particle-free work environment, all components of your hood work in tandem to attain optimal functionality. Hoods are enclosures, sometimes called work benches, work stations, or cabinets, that either blow filtered air down onto the work surface (positive pressure) or exhaust filtered air to the outside (negative pressure), based on the nature of the application. Below is a guide to understanding the different components of your cleanroom hood.