When it comes to thermocouple calibration furnaces, there is a wide range of options available. Understanding the differences between various types can help you make the right choice for your specific needs.
Tube Furnaces
Tube furnaces are a popular choice for many applications. They typically feature a long, cylindrical tube where the thermocouples are placed for calibration. Tube furnaces are often used for base - metal thermocouples. They are relatively simple in design and can provide a high - temperature environment. However, they may not offer the same level of temperature uniformity as some other types of furnaces. In addition, they may have limited immersion depth options.
Box Furnaces
Box furnaces have a rectangular chamber, providing more space for calibrating multiple thermocouples simultaneously. They are suitable for a variety of thermocouple types and can achieve high temperatures. Box furnaces often offer better temperature uniformity in the horizontal plane. Some models come with multiple heating zones, allowing for more precise temperature control. However, they may be larger and more expensive than tube furnaces.
Isothermal Block Furnaces
Isothermal block furnaces use a block of material, such as ceramic alumina, to create a highly uniform temperature environment. These furnaces are ideal for calibrating noble - metal thermocouples. The isothermal block helps to minimize temperature gradients, ensuring accurate calibration. Isothermal block furnaces are often used in applications where high precision is required. However, they may have a limited temperature range compared to some other furnace types.
By comparing the features, advantages, and limitations of different types of thermocouple calibration furnaces, you can select the one that best meets your calibration requirements.
