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An instrumentation unit that measures heat flow along the test column ofsolid metal samples is described. The study also describes the design of adatalogger using Arduino Mega Microcontroller. The designed instrumentationunit incorporates current and voltage sensing unit, ten thermocouple sensorsand amplifiers, microSD card shield, two LCDs, four microcontrolled switchingrelays and a 12 V DC water pump motor. The heat flow parameters measured by theinstrumentation unit includes temperature gradient, heater current and heatervoltage. The designed datalogger logs the measured value of temperature,current and voltage at a time of ten minutes. An area of application for thisstudy is in the development of a device for measurement of thermal conductivityof solid metals. It is an improvement over existing heat flow measurementtechniques.

Design of an Instrumentation Unit with Datalogger for Heat Flow Measurement in Solid Metals