Fundamental of Laboratory Hot Air Oven

Fundamental of Laboratory Hot Air Oven

Laboratory hot air ovens are used in the research centers and laboratories to test or treat the glassware and chemicals at a temperature up to 250oC. Hot Air Ovens are not limited to labs for treating chemicals; it finds wide application in manufacturing industries, research institutions, research and development centers of production industries, hospitals, to fulfill the purpose of heating, sterilizing and drying.

The main frame body or external body of this device are constructed using mild steel and strong, seamless welding and covering with a thick bright chrome or zinc plating to protect the device from being corroded in adverse environmental conditions. These specifications of oven provide a strong and heat resistant surface for a long lasting and attractive finish of the testing device. To design high-quality of ovens, manufacturers follow the instructions of standards that are introduced by standardization authorities.

Working Principle of Laboratory Hot Air Oven

The double wall chamber of the device is filled with glass wool that helps to prevent heat loss so that the chamber can reach the temperature up to 250 degree Celsius easily. The hot air ovens work on the principle of forced circulation of hot air inside the chamber. It is a universal fact that in any chamber the temperatures rises up to the top of the chamber and then circulates back to the bottom, similarly in hot air ovens, hot air rotates throughout the chamber evenly with the help of blower fans for maintaining an even temperature throughout the chamber.

Detect the change in the physical characteristics of the material with a Presto hot-air oven

The Presto hot air oven is versatile and reliable equipment designed to detect changes in the physical characteristics of materials. It is equipped with advanced features that ensure precise temperature control and accurate test results, making it an ideal choice for various industrial and laboratory applications.

The oven features a double-walled chamber, with the inner body constructed using heavy-duty stainless steel for durability and efficient heat distribution. The outer body is made of mild steel and neatly powder coated, providing a sleek and professional appearance.

To ensure optimal insulation, imported mineral glass wool is used between the double walls, minimizing heat loss and maximizing thermal efficiency. This insulation, coupled with the microprocessor-based programmable digital temperature controller cum indicator, allows for uniform temperatures throughout the chamber, enabling highly accurate test results.

The temperature control system incorporates a special T/P action, which prevents temperature overshooting and maintains a stable and precise environment for testing. The PT-100 sensor enables accurate temperature sensing, further enhancing the reliability of the oven. You can also read about the purpose of using a hot air oven and test your products accurately. 

This unique test cabinet has been designed as per industry standards that include ASTM D1776, ASTM D1776M-15, and BS950 Part-1(D65). This will ensure accuracy in test results. 

This hot air oven also includes a digital preset timer, displayed in hours, minutes, and seconds. This timer offers the convenience of setting both the desired time and process time, allowing for precise control over the testing duration. Additionally, the oven features an inbuilt auto-tuning function, further simplifying the operation and ensuring optimal performance.


Features of Presto hot air oven

The Presto hot air oven is a dependable and efficient and cost-effective lab testing instrument that will accurately detect the changes in the physical characteristics of materials. Its advanced features, such as the double-walled chamber, precise temperature control, and digital preset timer, make it a valuable asset in various industries and laboratory settings.

Below we have listed the advanced features of this quality testing equipment:

  • Inbuilt Auto tuning function
  • Water Level Indicator
  • Equipped with rapid air circulation
  • German imported fan for uniform and
  • Homogenous heating, cooling
  • Humidity, de-humidity inside the Chamber
  • Inbuilt Calibration feature
  • Auto stop feature to stop the machine at Set time


  • Other capacities/sizes are also available
  • Tower Lamp (optional) 3 Identification lights (Red, Yellow, Green)
  • Communication port USB 

Technical specifications:

  • Inside Dimension : 455 x 455 x 710 mm
  • Display: HMI Based Touch Screen
  • Accuracy Temperature : ± 2ºC / Humidity ± 5%
  • Least Count/Resolution Temp / Humidity: 0.1ºC / 1 %
  • Power : 15A, 220V , Single phase, 50 Hz
  • Temperature Range : 15ºC to 60ºC
  • Humidity Range: up to 95%RH
  • Timer: 9999 Hrs.
  • No. of Sample racks: 2
  • Wet Heater: 1 kW, 1 no.
  • Dry Heater: 500 Watt, 1 no.
  • Temperature Sensor: 1 (PT-100)
  • Humidity Sensor: 1 (RH)
  • Movement: Castor Wheels
  • Material: Exterior and Interior Stainless Steel Finish Stain Steel matt finish for corrosion resistance
  • Water Level Low: Alarm output

You can read more on the maintenance tips for lab hot air ovens. Just give us a call at +91 9210903903 or email us at Our experts will guide you well regarding your queries related to this testing instrument.

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