Thermal conductivity is an important property in engineering, and this device utilizes the guarded hot plate method to measure it. The setup consists of an electrical heater, or hot plate, placed between two plates. To minimize heat loss from the hot plate, two guard heaters are employed. Additionally, water circulation is used to dissipate heat from the liquids. The heater input is controlled to regulate the temperature, ensuring accurate measurements of thermal conductivity.

Experimental Objective 

determine the thermal conductivity of liquid
study of heat transfer through liquid.

Specifications 

The guarded hot plate assembly features a main heater, ring guard heater, and top guard heater, all positioned above the liquid test cavity.
A cold plate assembly with water connections is included.
The entire setup is enclosed in a well-insulated box lined with glass wool.

The instruments panel includes:

• Digital voltmeter and ammeter with appropriate ranges
• Three 2-amp dimmer stats for precise heater input control
• Multichannel digital temperature indicator for accurate readings

Floor space of approximately 0.75meters x 1.5meters at working height. 

230V AC electrical supply with earthing connection. 

Water flow rate of around 10-15litres/min at constant head.