Lab Equipment for Teaching Physics

Features 

• High performance temperature controller and sensor

• Simple structure, stable and reliable

• Affordable

  
  

Introduction

The thermal conductivity coefficient is a key physical property that indicates how well a material conducts heat. Changes in the material's structure or the presence of impurities can significantly affect its thermal conductivity. As such, it is essential to experimentally measure this property in various materials to understand their heat transfer characteristics. 

This apparatus uses the steady-state method to measure the thermal conductivity of a poor conductor, such as rubber or bakelite. The steady-state method involves heating a specimen with a known heat source and observing the temperature distribution within the material until thermal equilibrium is achieved. The material's thermal conductivity can then be calculated based on the temperature differences observed.

The LETI-20 Thermal Conductivity Measurement Apparatus is designed with precision and ease of use in mind, offering a reliable way for students to explore the thermal properties of materials.

This apparatus uses an adaptive heating plate that is controlled by a microcomputer, ensuring precise temperature regulation with a reading resolution of 0.1°C. It is specifically designed to measure the thermal conductivity of poor conductors such as rubber and bakelite, making it suitable for materials with low thermal conductivity. The instrument ensures stable and accurate data collection, allowing students to calculate the transfer rate and cooling rate effectively.

This apparatus is commonly used in university-level thermal physics experiments, providing an educational tool for understanding heat conduction principles. Students can perform the following experiments with the LETI-20 Apparatus:

1. Measure the Thermal Conductivity of Poor Conductors:

    Objective: Measure the thermal conductivity of materials such as rubber and bakelite.

    Method: Using the steady-state method, students heat the specimen and record the temperature distribution. From these measurements, they can calculate the material's thermal conductivity.

2. Calculate Heat Conduction Rate Using Cooling Rate:

    Objective: Learn how to calculate the heat conduction rate and the cooling rate of a material.

    Method: By monitoring the cooling rate of the specimen once the heat source is removed, students can determine how efficiently the material conducts heat.

3. Use of Integrated Temperature Sensor:

    Objective: Understand how temperature sensors work and how to integrate them into experiments for precise measurements.

    Method: The apparatus includes an integrated temperature sensor, allowing students to directly measure and record temperature variations within the material.

The LETI-20 Thermal Conductivity Measurement Apparatus is an excellent tool for students to learn and understand key concepts in heat transfer, especially thermal conductivity. Through hands-on experimentation, students will:

- Learn the Steady-State Method: Understand the process of heating a specimen and achieving thermal equilibrium, then using temperature data to calculate thermal conductivity.

- Explore Material Properties: Gain insights into how materials like rubber and bakelite conduct heat and the factors that influence thermal conductivity.

- Develop Data Analysis Skills: Enhance their ability to analyze experimental data, calculate heat conduction rates, and draw meaningful conclusions about material properties.

The instruction manual of LETI-20 Apparatus comes with:

- Experimental Configurations: Detailed setup instructions for assembling and operating the apparatus.

- Step-by-Step Instructions: A guide for conducting the experiment, ensuring accurate results and a clear understanding of the principles.

- Theoretical Insights: An explanation of the steady-state method and the science behind thermal conductivity measurements.

- Example Results: Sample data and analysis to help students compare their results and understand the methods of calculation.

For further details on the experiment theory, setup, and applications of the LETI-20 Thermal Conductivity Measurement Apparatus, refer to the  Experiment Theory and Contents. This apparatus provides an interactive and educational way for students to explore the fundamentals of heat transfer and thermal properties.

Main Specifications

Part List