Difference Between Autoclave and Dry Heat Sterilizer

Difference Between Autoclave and Dry Heat Sterilizer

There are many other sorts of microbial life forms that may be eliminated or killed during the sterilization process, such as bacterial spores and viruses. Autoclaves and heat sterilizers, for example, employ heat, steam, and pressure to sanitize items. Both do the same thing, although they’re distinct from one another in a variety of ways.

Autoclave Vs. Dry Heat Sterilizer

Autoclaves employ temperature and pressure to sterilize, while heat sterilizers use heat to achieve the same.. As a side note, an autoclave may finish the procedure in less time than a heat sterilizer, which is slower and takes longer to do so.

Equipment may be sterilized in an autoclave using high pressure and temperature, which is a pressure chamber, vessel-shaped. To sterilize, it is the most efficient, oldest, and most widely used mode of action. Both pathogenic and non-pathogenic bacteria as well as spores and viruses may be killed by this product.

A dry heat sterilizer uses an oven to destroy germs by maintaining a high temperature. Only the temperature of the heat sterilizers affects the time it takes to perform the process. Another common way for sterilizing is to use this procedure. Moist heat may cause harm to certain goods, thus it is only utilized for them.

Autoclave: What Is It?

Microorganisms, viruses, and spores may all be killed by using an autoclave, which has a pressure chamber and a vessel. Steam sterilizers and autoclaves are both typical names for the same device. To sanitize dental or medical equipment or supplies, it is most often employed. Autoclaves come in a variety of sizes and varieties. Sterilization is carried by using a combination of heat and pressure.

Autoclaving is the oldest and most widely used technique of sterilizing because it is devoid of environmental dangers. Autoclave sterilization remains the preferred approach in hospitals and labs, despite the introduction of new technologies and instruments. First, the microorganisms are put in an autoclave pressure vessel, where they are heated to an adequate temperature in a certain time period, which ultimately kills them. Equipment or materials being sterilized are heated by the moisture in the steam.

Time, temperature, and pressure quality are all critical in the Autoclave when sterilization is concerned. Vapor steam with a moisture content of 3% is required for vital sterilization since this is the only steam that will do the job (liquid water). An very dry and effective method of transporting heat to the pressure vessel is termed superheated steam.

What Is a Dry Heat Sterilizer Used For?

An oven-like structure, heat sterilizer devices sanitize equipment or materials damaged by moisture using heat. The process is carried out by use of hot air. Conduction is used in heat sterilizers to finish the sterilizing process. To sterilize an object, the item’s outer layer absorbs heat from the sterilizer and passes it to the item’s inner layer, and so on, until the item reaches the desired temperature.

Dry heat sterilizers and wet heat sterilizers are the two main kinds of heat sterilizers. Because water or any other liquid might interfere with or harm a sterilizing process, it’s important to make sure that any equipment or item that will be sterilized using dry heat is entirely dry before putting it in, even if it’s just for a short period of time.

Moisture content speeds up heat transmission in moist heat sterilizers, enhancing the sterilizing process as a whole. The heat sterilizers’ high-velocity hot air mechanism employs detribalized hot air that is accelerated through the jet curtain at a fast pace, making it more efficient.

Difference Between Autoclave and Dry Heat Sterilizer

Dry heat sterilizers, on the other hand, are oven-like devices that utilize temperature and time to remove microbiological life from the surface of instruments, while autoclaves employ temperature, pressure, and time to sterilize instruments.

Heat sterilizers are less expensive than autoclaves.

It is more expensive to buy and maintain an autoclave than to use a heat sterilizer. The initial cost of a heat sterilizer is lower than that of a steam autoclave.

Temperatures in autoclaves need to be maintained at 121°C or 250°F for at least 15 minutes, whereas in heat sterilizers the temperature needs to be maintained at 350°F for at least an hour, or 340°F for at least an hour.

Autoclaves can sterilize several materials at the same time in the shortest feasible time, while heat sterilizers sterilize at a slower rate and must thus be used for longer periods of time to accomplish the work.


Both autoclaves and heat sterilizers may sterilize the same thing, but there are a few benefits to each that make them distinct from one another in a variety of ways.. As a result of their straightforward construction, heat sterilizers have cheap operating and maintenance costs. Despite the noted differences, the operational costs for both are essentially the same.

Any piece of equipment that can withstand heat and moisture may be sterilized in an autoclave. For goods that cannot be sterilized with steam or that cannot take moisture, dry heat sterilizers provide an alternative.

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