RH-I Digital Glass Softening Point Tester (Hanging Wire Method)

The testing principle of this instrument is to uniformly heat a glass fiber sample of a certain specification in an electric furnace. After the glass fiber is heated, it elongates due to its own weight. When the temperature rises to a glass fiber elongation rate of 1mm/min, the temperature at this time is equivalent to the temperature at which the viscosity of the glass is 4.5 * 106Pa. s.
Pull the glass into a wire with a length of 235mm+1mm, heat it in an electric furnace, and measure the length change of the wire with a projection camera micrometer. The measured value is the expansion value.
Technical parameters:
1. Testing method: Hanging wire method testing
2. Operating temperature: 1000 ℃
3. Accuracy: less than 0.5%