Typically, we read the temperature shown on a glass rod thermometer, which reflects the air temperature under normal ambient conditions. However, when placed inside a vacuum chamber, the same thermometer still shows a reading. But can we confidently say that this reading represents the actual temperature inside the vacuum chamber? The answer is no. In a vacuum, there is no air, and therefore, no air temperature exists. What the thermometer measures in such an environment is not the temperature of the surrounding space, but rather the heat it absorbs from radiation. The temperature measured by the glass rod thermometer in a vacuum depends largely on the surface properties of the thermometer itself—such as its roughness and its ability to absorb, reflect, or transmit infrared radiation. In technical terms, this is referred to as "emissivity." The higher the emissivity (closer to 1), the more infrared radiation the object absorbs, leading to a higher measured temperature. Conversely, a lower emissivity means less absorption and a lower reading. Therefore, the reading on the glass rod thermometer in a vacuum does not represent the true temperature of the objects inside the chamber. It only indicates the temperature of the thermometer after absorbing infrared radiation. This is especially important when dealing with different materials, as their surface characteristics can significantly affect how much heat they actually absorb. As a result, relying solely on the thermometer's reading may not provide an accurate representation of the actual thermal conditions experienced by the samples being tested or dried. When using an electric vacuum drying oven, it's essential to understand that the thermometer reading in the vacuum chamber is just one factor to consider. Operators should combine this information with their own experience, observe the behavior of the materials, and adjust the process accordingly to achieve optimal results. Over time, this hands-on approach helps improve accuracy and efficiency in vacuum-based applications. ABLE Electric Log Sets, made of light ceramic raw materials or cement materials , light weight but strong not easy to break, hand-painted, natural colors and amazing details & realistic shapes, easy turn redness in the fire, can enhance the fireplace flame, all made of inorganic materials, odorless, fire-resistant temperature >900℃, product can be used for a long time, with reasonable price. Electric Log Sets,Electric Firepit Log Set,Electric Log Set Insert , Electric Ceramic Log Set Insert Yixing Able Ceramic Fibre Products Co., Ltd , https://www.ablegaslogs.com
ABLE also have advanced molding technology for ceramic log called cast log, it is lighter, stronger, fuller details, and glowing area is larger in the fire.ABLE can supply many kind of log accessories for fireplace, such as pebbles, coals, charcoals, pine cones, maple leaves, aglow ember, top-grade rock wool, stained vermiculite, small coal chips, barks, balls and hollow ball, ceramic pitted pebble and rough Lava rock that won't burst in outdoor fire pit, Pumpkin lamp, Skull and bone for Halloween Decor fire, fireplace log grate etc.
ABLE factory is located in Yixing City, Jiangsu. It is a well-known production base for fire resistant insulation materials and environmental protection products. Yixing is also a city has developed commerce and convenient transportation. Our company sincerely hopes to cooperate with professional customers, and welcome to visit our factory!