Introduction: The Conductivity of Liquids and Gases unit has been specifically designed to enable to measure and compare the thermal conductivities of various liquids and gases. It’s designed to facilitate quick and effective cleaning and to minimise thermal losses. The unit comprises a cylindrical, electrically heated, nickel-plated aluminium core surrounded by a nickelplated aluminium sleeve. The core and the sleeve are arranged so that a uniform narrow annular gap is created between the two parts, which is filled by the liquid or gas to be analysed.

Specifications: A small-scale accessory to allow students to measure the thermal conductivity k of various liquids and gases.Comprises a water-cooled, aluminium outer sleeve surrounding a heated aluminium core creating an annular gap 0.5mm wide that is filled with the fluid under test.Nominal heat transfer area 1.225 x 10-2 m2.Gas or liquid sample volume 6.126ml.Heater power is variable up to 200W.Heater can be voltage or PID controlled allowing for the temperature set-point to be achieved rapidly and maintained within 0.1°C.Two PT100-type thermocouples measure the temperature gradient across the liquid or gas under test. Nickelplated surfaces to minimise radiation losses, narrow annular gap to minimise convection losses and thermally insulated to minimise heat exchange with the atmosphere.A comprehensive instruction manual describing how to carry out the laboratory teaching exercises to measure thermal conductivity as well as installation and commissioning is included.