General Purpose Glass Thermometer, Green Filled, -10 to +110°C, 200 mm

Description

The General Purpose Glass Thermometer, Green Filled, -10 to +110°C, 200 mm, also known as a laboratory glass thermometer, green spirit thermometer or partial immersion thermometer, is designed for measuring temperatures during routine laboratory experiments and educational science activities. Manufactured under the Initial™ Brand by Brannan, this thermometer combines a traditional liquid-in-glass measuring system with a clearly printed Celsius scale. Its construction allows students and laboratory personnel to observe temperature changes without batteries or electronic measuring equipment.

The thermometer measures temperatures from -10°C to +110°C, covering a range commonly encountered in school science experiments, liquid temperature investigations and general laboratory procedures. Its scale is graduated in 1.0°C divisions, allowing users to read temperatures directly. The green non-mercury liquid filling expands and contracts with temperature changes. As the liquid moves through the narrow glass capillary, its position against the graduated scale indicates the temperature being measured. The green column is designed to provide good visibility during practical work. This makes the instrument useful for students learning how to read liquid-in-glass thermometers and record temperature measurements correctly.

Measuring 200 mm in length and approximately 6.5 mm in diameter, the thermometer has a slim glass body suitable for use with compatible laboratory containers. Its length allows the graduated scale to remain accessible during partial immersion measurements. The instrument is designed for 76 mm partial immersion, meaning the thermometer should be immersed to its specified depth when taking readings. Immersing it substantially above or below this depth can introduce measurement errors. The manufacturer’s stated accuracy is ±1.5°C at 35°C. This is different from its 1.0°C scale division, which describes the spacing between graduation marks rather than the overall accuracy of the instrument.

A moulded triangular non-roll top helps prevent the thermometer from rolling across laboratory benches. This practical feature supports safer handling and storage, although the glass body remains fragile and requires care. The thermometer is suitable for monitoring liquid temperature changes, heating and cooling experiments, water bath investigations and introductory thermal science activities, provided the measurement conditions remain within the specified operating range. For reliable readings, immerse the sensing section to the marked depth, allow sufficient time for the liquid column to stabilise and read the scale at eye level. Avoid touching the bulb against the container walls when this could affect the reading.

Safety Precautions: Handle glass thermometers carefully and avoid impacts or sudden temperature changes. Do not expose the thermometer directly to flames or temperatures outside its measuring range. If broken, follow laboratory procedures for collecting glass fragments and cleaning the filling liquid. Each unit is supplied as one Initial™ Brand Green Filled Glass Thermometer with a reusable protective storage tube. A separate calibration certificate is not confirmed as included.

LabChoice Australia supplies laboratory glass thermometers and educational temperature measurement equipment for secondary schools, universities, research facilities and science teaching laboratories across Australia.