Laboratory Ovens & Heating Devices
Several styles and models of ovens are available. The most commonly used ovens in the materials testing industry are listed; however, should you require an oven not listed, we can help you. Please contact us.
When choosing a laboratory oven you should consider the following:
Temperature-You will want to select an oven with a maximum temperature rating greater than your maximum temperature requirements. This will allow the set temperature to be maintained more accurately.
Circulation-Ovens use either gravity convection or mechanical draft (forced draft) to heat the oven contents. Gravity convection ovens may have "cold" and/or "hot" spots as the air inside the oven can become stagnant. Circulation depends on the difference in the air temperature within the oven. Typically, mechanical or forced draft ovens have fans that induce air flow through the oven to produce even heating. Many ASTM and AASHTO standards require use of a forced draft oven.
Size-Sample container size, the number of samples and personal preference are important factors in properly sizing an oven. An oven with extra interior capacity might be nice to have but oversized ovens require more energy to heat, special electrical power and can take up valuable space in the laboratory. Multiple smaller ovens rather than one large oven may be a good choice. Nevertheless, large ovens do have a place in the high-production laboratory or when large sample sizes are needed such as aggregate or asphalt testing.
Controls-Digital controls allow the operator to easily set the temperature requirements and display the actual oven temperature.
Location-Choose your oven location carefully. Proper location can be a great time saver. Scales, balances and ovens are the most frequently used items in the materials lab. Placing them in the flow path of samples in the laboratory can be a great time and labor saver. Ovens are often placed along a wall, with the scales and balances located beside the oven or on a work table in front of the oven. Be sure to consider exhaust requirements as well!
Motor protection- Should it be explosion-proof for volatile samples?
Mounting-Should it be a table top or floor mount model?