Abstract
This paper presents a low-cost temperature-controlled chamber based on the natural radiation principle. The temperature-controlled chamber assembled using a 1.0 mm thick aluminum sheet equipped with expanded polystyrene lagging material, temperature controller, K-type thermocouple and solid-state relay. A high precision temperature sensor (K-type thermocouple) attached to the sample under test (SUT) near the instrument’s measuring point gives a feedback signal to the temperature integrated derivative (TID) controller. The accuracy of temperature readings from the chamber investigated and the chamber itself, calibrated with temperature sensor by Fluke, show temperature readings that correspond to the set temperature values. In addition, perovskite thin film deposited on a glass substrate of 75 × 25 mm was tested and the temperature readings equally correspond to the temperature set values. This low-cost and low-energy-consumption chamber could use in laboratories in the developing world where there is scarce power supply.
Highlights
A temperature controlled-chamber is an apparatus used to monitor the effects of temperature on the material under test
The temperature values detected by a K-type thermocouple attached to the substrate shows that temperature reading is comparable to the average temperature reading from the chamber
Mean temperature of 100.35 ± 0.78 ◦ C recorded in the chamber at set temperature of 100 ◦ C during chamber testing
Summary
A temperature controlled-chamber is an apparatus used to monitor the effects of temperature on the material under test. Two experiments carried out based on (a) without rabbit; and (b) with rabbits, showed that the chamber provided precise temperature control during heat stress studies in rabbits [4]. (2015), developed a low-cost integrated constant-temperature chamber with high precision, based on the natural convection principle. The National Institute of Standard and Technology (NIST), which minimized the measurement uncertainty of an invented molecular measuring machine [8], developed a spherical temperature chamber with a multiplayer. They reported that stable temperature of 20 ± 0.001 ◦ C achieved when the room maintained at 17 ± 0.01 ◦ C. We present a fabricated and calibrated low-cost temperature-controlled chamber that uses an electric filament bulb, rather than a metal halide lamp
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