General Purpose Glass Thermometers, 405 mm, LO-tox Filled, 76 mm Immersion

Description

The General Purpose Glass Thermometers, 405 mm, LO-tox Filled, also known as LO-tox laboratory thermometers, non-mercury liquid-in-glass thermometers or partial immersion thermometers, are designed for temperature measurement in educational, research and general laboratory environments. Manufactured by Brannan UK, these thermometers feature a specially developed LO-tox organic filling and graduated Celsius scales. Their liquid-in-glass construction provides a straightforward method of measuring temperature without batteries or electronic measuring instruments. The range includes four variations, covering -10°C to +260°C, -1°C to +51°C with 0.1°C divisions, -1°C to +51°C with 0.2°C divisions, and -1°C to +101°C with 0.2°C divisions.

The -10°C to +260°C thermometer features 1.0°C graduations and is suitable for laboratory procedures requiring an extended temperature range. Its manufacturer-specified accuracy is ±2.0°C at 90°C. The -1°C to +51°C variation with 0.1°C divisions provides finer graduation intervals for experiments involving relatively small temperature changes. It is suitable for temperature comparison exercises and laboratory investigations where detailed scale readings are required. The second -1°C to +51°C variation features 0.2°C divisions, providing an alternative graduation interval within the same measuring range. Both models have a manufacturer-specified accuracy of ±1.0°C at 35°C.

The -1°C to +101°C thermometer features 0.2°C graduations, providing a wider measuring range while retaining relatively fine scale intervals. Its specified accuracy is ±1.0°C at 90°C. All four thermometers measure 405 mm in length and approximately 6.5 mm in diameter. Their elongated glass construction provides space for clearly graduated scales, allowing convenient reading during laboratory measurements. The blue LO-tox liquid filling expands and contracts in response to temperature changes. As the coloured liquid moves through the narrow glass capillary, its position against the graduated scale indicates the measured temperature.

Brannan developed the LO-tox filling as a lower-hazard alternative to mercury. The organic liquid provides a visible measuring column, although appropriate precautions remain necessary when handling or cleaning up broken thermometers. Each model features a 76 mm partial immersion design. For measurements consistent with its specified calibration conditions, the thermometer should be immersed to the designated depth while the remaining stem stays outside the measured medium. A non-roll Evoprene end cap helps prevent the thermometer from rolling across laboratory benches. Its integrated suspension ring also allows convenient storage in a compatible thermometer holder.

These instruments are suitable for chemistry experiments, heating and cooling investigations, liquid temperature monitoring and general laboratory testing. The appropriate variation should be selected according to its temperature range, scale divisions and accuracy. For reliable measurements, immerse the thermometer correctly, allow the liquid column to stabilise and read the scale at eye level. Avoid contact between the sensing bulb and container surfaces that may affect the result.

Safety Precautions: Handle glass thermometers carefully and avoid impacts, sudden temperature changes and direct flame contact. Do not exceed the selected measuring range. Follow the manufacturer’s safety guidance when handling broken glass or spilled LO-tox filling. Each selected variation is supplied as one Brannan LO-tox Glass Thermometer in an individual protective telescopic tube. Calibration certification is available separately on request.

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