Model : PSO- 451
A hot-air oven is a piece of laboratory equipment used to sterilize equipment and materials by dry heat. It works on the principle of hot-air circulation at a constant temperature, typically 50°C to 300°C, and is designed for uniform heat distribution. Commonly used for glassware, metal instruments, and powders, it destroys microorganisms through oxidation.
Unlike moist-heat sterilization (autoclaving), the hot air oven is suitable for materials that cannot tolerate high temperatures if they are moist. Used extensively in microbiology, pharmaceuticals, and research laboratories, it aims at attaining sterile conditions to avoid contamination of experimental material.
A hot air oven is utilized in the laboratory for the sterilization of equipment and materials with the help of dry heat. This is extensively used for the sterilization of glassware, metal instruments, and powders that cannot be wet sterilized in microbiology, pharmaceuticals, and chemical laboratories.
The hot air oven uses the principle of dry heat sterilization, where hot air is circulated within the chamber through convection currents to perform sterilization. This hot air removes the moisture from microorganisms; as a result, they get oxidized and their proteins are denatured, hence killed. The operating temperature usually ranges between 160°C and 180°C to ensure complete sterilization.
Here are the uses of a hot air oven explained in detail:
Sterilization of Laboratory Glassware
Laboratory glassware such as test tubes, Petri dishes, and flasks are sterilized in hot air ovens, with dry heat efficiently killing the microorganisms and spores without moisture. The glassware is thereby free from any contaminant microorganism or spores and safe for microbiological and chemical experiments.
Sterilization of Metal Instruments
Metal instruments, such as scalpels, forceps, and surgical tools, are usually sterilized in hot air ovens, since they are heat-resistant. Dry heat removes moisture and kills bacteria, fungi, and spores, making the instruments clean and reusable for laboratory or clinical procedures.
Drying Laboratory Materials
Hot air ovens are ideal for drying chemical substances, powders, and glassware after having been washed. The uniform circulation of hot air removes moisture completely to prevent microbial growth and maintain the quality and accuracy of samples or reagents used during laboratory testing.
Heat Treatment of Materials
They are utilized for heat treatment processes in research and industrial laboratories, such as baking, curing, or annealing different materials. Controlled heating improves material stability, strength, and chemical properties, thus making it suitable for various testing and production applications.
Hot Air Oven Temperature
The hot air oven temperature usually ranges from 50°C to 300°C, depending on the application. For sterilization, common settings are 160°C for 2 hours or 180°C for 1 hour. The uniform dry heat ensures the destruction of microorganisms by oxidation, whereby materials are made completely sterile without the use of moisture.
Here are the applications of a hot air oven explained in detail:
Microbiological Sterilization
Most microbiology laboratories sterilize glassware and instruments with metal tools using hot air ovens. The dry heat kills the bacteria, spores, and fungi by oxidation; this ensures that all the materials are free of any microbial contamination before using them in experiments or culture preparation.
Pharmaceutical Industry
Hot air ovens are used in the pharmaceutical field for the sterilization of glass containers, powders, and syringes, which are sensitive to moisture. The process ensures that medicines and packaging materials remain germ-free, hence ensuring product safety, purity, and hygiene standards, while manufacturing and testing drugs.
Chemical laboratories
Laboratory hot air ovens are used in chemical laboratories to dry samples, reagents, and containers that may contain moisture. It guarantees the correctness of weight and measure, avoids the chemical reaction with water, and maintains the integrity and stability of the chemicals stored or tested.
Food Industry
In the food industry, hot air ovens are used to sterilize utensils, glass jars, and containers employed during the processing and packaging of foods. This dry heat method ensures that the treated items are free from harmful microbes and makes food safe for a longer period without deterioration in quality.
Presto Instruments Hot Air Oven is highly preferred because of its precision, reliability, and durability. The oven exhibits uniform heat distribution through its advanced air circulation system, which helps in the proper sterilization and drying of the materials. Constructed with high-quality material and digital temperature controllers, it offers consistency in performance and energy efficiency. It is perfect for laboratories and industry sectors, as it assures safe, contamination-free, and efficient operations.
Presto Instruments is a leading manufacturer and supplier of Hot Air Oven. For the best price, contact us for a quote or call now!
The hot air oven is a laboratory appliance designed for the process of sterilization of materials with the use of dry heat. It circulates hot air around the chamber to eliminate microorganisms through oxidation. Ideal for the sterilization of glassware, metal instruments, powders, and oils that are sensitive to moisture.
Temperature control in a hot air oven is maintained with a digital temperature controller or thermostat. These are highly sensitive and maintain the set temperature by controlling the electric heating elements and distributing the temperature uniformly inside the chamber using air circulation fans.
The price of hot air ovens depends on size, capacity, and features. Generally, it ranges between ₹25,000 and ₹45,000 for laboratory models and goes even higher; whereas the more advanced or industrially used models with digital controls and safety features are available at much higher prices.
Hot air ovens come in a range of capacities, usually from 20 liters to 300 liters and upwards. The smaller ones are used in laboratories for sterilizing glassware, while their bigger units find application in pharmaceuticals and industries for the processing of bulk material.
The calibration of a hot air oven is usually necessary every 6 to 12 months so that it can correctly measure the temperature for good performance. Regular calibration verifies that the oven maintains proper sterilization conditions, ensuring the reliability and safety of laboratory or industrial operations.
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