Low-Range Glass Thermometers, 305 mm, Red Spirit, Total Immersion

Description

The Low-Range Glass Thermometers, 305 mm, Red Spirit, Total Immersion, also known as low-temperature laboratory thermometers, spirit-filled glass thermometers or total immersion thermometers, are designed for measuring temperatures below and above 0°C in scientific laboratories and educational environments. These thermometers use a liquid-in-glass measuring system with red spirit filling and graduated Celsius scales. Their construction provides a straightforward method of monitoring temperature without requiring batteries or electronic measuring instruments. The range includes two temperature options: -100°C to +50°C and -50°C to +50°C, allowing users to select a suitable thermometer for their expected measurement conditions.

The -100°C to +50°C thermometer provides an extended low-temperature measuring range for suitable laboratory investigations. Its white-backed scale offers contrast against the red liquid column, helping users identify temperature readings. The -50°C to +50°C thermometer covers a narrower temperature range for routine sub-zero investigations and temperature comparison experiments. Its red spirit filling provides a visible indication of temperature changes throughout the specified range. Both thermometers feature 1.0°C scale divisions, allowing temperatures to be read directly in Celsius. These graduations indicate the spacing between scale marks and should not be confused with the instrument’s measurement accuracy.

Each thermometer measures 305 mm in length, providing an elongated glass body with sufficient space for the graduated temperature scale. The slim construction makes the instruments suitable for compatible laboratory vessels and experimental arrangements. The red spirit filling expands and contracts as the surrounding temperature changes. This movement shifts the liquid column through the glass capillary, allowing the temperature to be determined from the corresponding scale marking. Both variations feature a total immersion design. This means the thermometer is calibrated for immersion to the level of the indicated temperature, with appropriate allowance for safe handling and the manufacturer’s instructions.

Correct immersion is important because differences between the temperature of the exposed liquid column and the measured medium can introduce errors. These thermometers support low-temperature experiments, cooling investigations, freezing-point demonstrations and general thermal science activities, provided the selected model is compatible with the measurement conditions. The -100°C variation is particularly useful when the required measurement extends below the operating range of conventional general-purpose laboratory thermometers.

For reliable measurements, position the thermometer correctly, allow the liquid column to stabilise and read the scale at eye level. Avoid contact with container walls or surfaces that may affect the reading. Safety Precautions: Handle glass thermometers carefully to prevent breakage. Avoid direct flame contact, sudden temperature changes and measurements outside the specified range. Follow laboratory procedures when handling broken glass or spilled spirit filling. Each selected variation is supplied as one Red Spirit Glass Thermometer, 305 mm, with the chosen temperature range. Protective packaging and calibration certification should be confirmed separately.

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