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A hot air oven is an electrical device that uses a thermostat to control the temperature. The unit uses dry heat sterilization as pressure built up is less. The insulation prevents heat loss. The material sterilize is usually dry as pressure is less. It is not suitable to heat the materials having liquid content.

 The materials used in the laboratories are needed to get sterilized after use. The hot air oven is used to deliver the heat treatment to the product. It has been widely used in the pharmaceutical industry, research laboratories, etc. The unit has a standard and simplified process which is cost-efficient. So the hot air oven is useful in various industries for a quick-drying process.

 Dry sterilization

Hot air oven generally uses dry heat sterilization technique for material sterilization. As the process is dry the material heated also has to be in a solid state like glassware, powder, metal equipment, oil containers. Usually, the material which has a high melting point or does not catch the fire is used for this type of sterilization.

 The working principle is simple. It operates on the conduction where the heat is conducted first at the bottom. Then it travels to the centre towards the top with or without the help of a fan. As the temperature starts raising the hot air mixture get lighter and move to the top. Then from the top, it crashes down to the bottom and creates the circular airflow. Due to the circular airflow, the temperature inside the chamber is constant everywhere. To reduce the temperature difference even more the fan and motor assembly is used to circulate the heated air mixture. The dry heat sterilization process is comparatively long time than autoclave.    

 Wet sterilization

An autoclave is equipment used for wet sterilization. It has a similar process as a hot air oven with a boiling pressure. Inside an autoclave, the water is filled that creates the water vapours and the pressure build-up which sterilizes the equipment faster. This process is generally used to kill the poison. But this process is generally more hazardous due to the high pressure.

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Hot air oven is a laboratory and scientific equipment which uses dry heat (hot air mixture) for sterilization of laboratory equipment.

Water is not needed for sterilization like an autoclave.

The pressure build is less which is safer while operating.

More effective to work and smaller in size.

Operation is simple

Hot air ovens are laboratory and scientific equipment which uses dry heat (hot air mixture) for sterilization of laboratory equipment.

The dry heat sterilization process is developed by Louis Pasteur to sterilize the equipment using the hot air ovens. Dry heat sterilization is the heating process in which the material which is placed inside the oven has the characteristics which will not melt, catch fire or changes its form while heating at high temperature.

Our hot air oven runs at extremely high temperature for several hours to destroy the bacteria. The general temperature range required for operation varies from 5°C to 450°C as per the customer need.

Hot air oven

Hot air oven

The hot air oven uses dry heat to sterilize the equipment. This equipment will not melt or catch fire while heating. The process destroys the microorganisms and bacteria while heating. The temperature range of hot air oven is between 50°C to 450°C with different types. The types are listed below

 1) Natural convection oven – Inside the natural convection oven the fan and the motor is not available. The air circulated naturally by the means of gravity. Hence it is also called a gravity convection oven. As the hot air oven starts operating the air gets heated up and the air flows up. The temperature is not wholly uniform in this oven.

 2) Force convection oven – These types of laboratory oven has a fan and a motor assembly. So that the heated air is circulated from top to the bottom. This method provides a uniform temperature throughout the chamber and also provides the fast heat up time.

 3) Side Draughts oven – This oven has the fan and the motor assembly but from the side. The hot air flows from the left to right direction or vice versa depending upon the fan placement. These hot air ovens also provide a uniform temperature distribution all over the chamber.

Natural convection oven – In natural convection oven the temperature is achieved naturally (gravity convection) without the use of a motorized blower. The temperature distribution is not uniform in this type of oven.

Forced convection oven – In a forced convection oven the motorized blower is used to achieve the desire working temperature. The blower is fitted to the motor. The temperature achieved is fast and uniform in this type of oven as compared to the natural type.

The hot air oven by Tempo Instruments Pvt Ltd

The hot air oven uses dry heat sterilization to kill the bacteria from the equipment. They are available in different types with various capacities and temperature range. The complete hot air oven details are provided on our website. In this post, you will get to know the different advantages and disadvantages which will help you in better identify the equipment.

 Advantage

1. Hot air oven uses dry heat sterilization so there is no much pressure build-up within the oven which makes it safer o work.

2. The less pressure builds up inside the hot air oven makes it suitable to work in a laboratory environment.

3. It kills the bacteria which is not possible with other treatments.

4. Hot air ovens are more rapid than autoclave

5. Does not leave any chemical residue after the process.

 Disadvantage

1. Some organisms like prion remain inactivated.

2. The hot air oven is not useful for heat-sensitive materials or plastic.

3. There is the possibility of glasses become smoky due to the high temperature.

4. The electricity requirement is continuous.

5. Dry heat sterilization is a slow and uneven process.

 TEMPO Instruments

 is an ISO certified manufacturer of high quality and innovative Laboratory & Scientific equipment to the global market.