Thursday, April 3, 2008

Gravity Ovens

There are so many different types of ovens to choose from.

The smallest and least expensive, is the Gravity Convection oven.

Gravity Convection is most similar to what we all use in our homes. The heating coils are located at the bottom of the chamber, and through natural convection, (heat rises, no fan) heat the chamber to your desired temperature.

These ovens are used for drying parts in a general Laboratory, Life Science, or Industrial setting. I've had customers who dry soil, glassware, metal and moisture test in these ovens.

While not as precisely accurate as a Mechanical Convection Oven, and usually at lower temperatures, Gravity Ovens are a good workhorse to have in the lab when you don't have big batches to do, or you require a lower heat.

Since the introduction of the digital controller about 15 years ago, these Gravity Convection ovens are fairly accurate in maintaining a constant temperature... usually within a 5% range or less.

You can still purchase these ovens with analog controls, and with an independent thermometer can achieve good accurate results.

Gravity ovens come in many sizes.

They come in pretty handy when you can't afford for your powered samples to be blowing around in the chamber, as would be the case with a Mechanical Convection oven.

Although it would work, I wouldn't recommend heating your leftover pizza in these, but for your small batches, a Gravity Convection oven is a good way to go..... more on Mechanical Convection ovens next week.

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