When it comes to protecting yourself and your laboratory from harmful particles and contaminants, a flow hood is an essential piece of equipment. Also known as a laminar flow hood, these devices create a sterile work environment by directing airflow to push away any potential contaminants.
Due to their importance, flow hoods can be quite expensive when purchased new. However, buying a used flow hood can be a cost-effective solution for labs looking to save money without compromising on quality. In this article, we will discuss how to choose the right used flow hood for your lab.
1. Consider the Size and Type of Flow Hood
The first step in choosing a used flow hood is to consider the size and type that you need for your lab. Flow hoods come in various sizes, with the most common being benchtop and floor-standing models. Benchtop flow hoods are ideal for smaller spaces and individual workstations, while floor-standing models are better suited for labs with larger work areas.
Additionally, you will need to decide between a vertical or horizontal flow hood. Vertical flow hoods direct airflow from the top of the hood downwards, while horizontal flow hoods push airflow from the back of the hood towards the front. The type of flow hood you choose will depend on your specific lab requirements and the type of work you will be doing.
2. Check the Certification and Quality of the Flow Hood
Before purchasing a used flow hood, it is important to check the certification and quality of the equipment. Look for flow hoods that have been certified by reputable agencies, such as NSF or UL, to ensure that they meet the necessary safety and performance standards.
Inspect the flow hood for any signs of wear and tear, such as cracks or damage to the safety glass. Check the filters to see if they need to be replaced, as dirty filters can compromise the effectiveness of the flow hood in removing contaminants. It is also a good idea to ask the seller for any maintenance records or service history of the flow hood.
3. Consider the Age and Usage of the Flow Hood
When buying a used flow hood, consider the age and usage of the equipment. Older models may have outdated technology or may be nearing the end of their lifespan, which could lead to higher maintenance costs in the long run. However, a well-maintained flow hood that has been lightly used could still provide years of reliable service.
Ask the seller about the age of the flow hood and how often it was used. Look for any signs of corrosion or rust, which could indicate that the flow hood has been exposed to moisture or harsh chemicals. It is also a good idea to test the flow hood before purchasing it to ensure that it is functioning properly.
4. Check the Airflow and Filtration System
The airflow and filtration system of a flow hood are crucial to its effectiveness in removing contaminants from the work area. Check the airflow velocity of the flow hood to ensure that it meets the necessary standards for the type of work you will be doing.
Inspect the filters of the flow hood to see if they are clean and in good condition. Some used flow hoods may come with used filters that need to be replaced, so factor in the cost of new filters when considering the overall price of the equipment.
In conclusion, buying a used flow hood can be a cost-effective solution for labs looking to save money on essential equipment. By considering the size and type of flow hood, checking the certification and quality of the equipment, considering the age and usage of the flow hood, and checking the airflow and filtration system, you can choose the right used flow hood for your lab. Remember to test the flow hood before purchasing it and consult with a professional if you have any doubts about the equipment. By following these tips, you can ensure that your lab is equipped with a reliable and effective flow hood to protect yourself and your work from harmful contaminants.