# Simple, Reversible Gradient Seebeck Coefficient Measurement System for 300-600K

## TL;DR

This paper introduces a simple, reversible, and real-time compatible measurement system for the Seebeck coefficient in the 300-600K range, avoiding hot chambers and enabling accurate thermoelectric characterization.

## Contribution

The developed system allows for accurate, reversible Seebeck coefficient measurements across a wide temperature range without the need for hot walled chambers.

## Key findings

- System measures Seebeck coefficient with high accuracy.
- Operates effectively under large temperature differences.
- Suitable for real-time thermoelectric applications.

## Abstract

An in-house Seebeck coefficient measurement system has been developed which can measure the thermoemf (Seebeck coefficient) of the sample, under large temperature difference, in the temperature range 300-600 K. Unlike majority of reported instrumental designs, the system does not have a hot walled chamber and hence is much closer to real time thermoelectric applications conditions. The system consists of two brass blocks supported heaters. These heaters are placed on either side of the sample through silver caps, thus allows individual temperature control. A reversible temperature gradient is applied across the sample and the measurement is carried out in quasi-static direct current mode. Hence, a more accurate Seebeck coefficient measurement is obtained.