Changsha Panran Technology Co., Ltd.
Common Methods for Calibrating Glass Thermometers
Source: | Author:Olivia | Published time: 2025-02-08 | 26 Views | Share:

There are various methods for calibrating glass thermometers. Below are several common ones:

  1. Ice Point Method
    The ice point method is a simple and commonly used calibration method suitable for calibrating the 0°C point. The specific steps are as follows:

    • Prepare a clean container filled with a pure ice-water mixture, ensuring the ice-to-water ratio is appropriate and the mixture temperature stabilizes at 0°C.

    • Insert the thermometer to be calibrated into the ice-water mixture, avoiding contact with the container's bottom or sides.

    • Wait for the thermometer reading to stabilize, then record the reading. If the reading is not 0°C, adjust the thermometer or record the error value for subsequent correction.

  2. Boiling Point Method
    The boiling point method is used to calibrate the 100°C point and is suitable for environments near sea level. The specific steps are as follows:

    • Heat pure water to boiling, ensuring the water temperature stabilizes at 100°C (note: the boiling point varies with atmospheric pressure and should be adjusted based on local pressure).

    • Insert the thermometer into the boiling water, avoiding contact with the container walls.

    • Wait for the reading to stabilize, then record the reading and adjust the thermometer or record the error value.

  3. Comparison Method
    The comparison method involves placing the thermometer to be calibrated alongside a standard thermometer of known accuracy in a constant temperature bath. The error is determined by comparing the readings of the two thermometers. This method is suitable for calibrating multiple temperature points and offers high precision.