A Simple Thermistor Design for Industrial Temperature Measurement

Abstract

This paper presents a simple temperature measurement design using thermistor for industrial purposes. This paper establishes the characteristics of the resistance via temperature and it's constant since it has been difficult to determine if a thermistor has a positive or negative temperature coefficient. The practical approach was adopted to determine its characteristics where it was revealed that all thermistors are nonlinear in nature. In this design, the empirical and the practical design were compared; its implementation considers the temperature within the ranges of 35 0 C to 60 0 C which is 308K to 333K respectively. Other considerations were given to the output voltages between 0.155V -1.055V, ambient temperature of 0 0 C -25 0 C, Percentage non-linearity as low as 0.16, and a sensitivity of 0.0367V/ºC but the resolution of this device is 1ºC.The result obtained were analysed to ascertain the functionality of the experimented design via its performance and suggestions on further improvement were made.

Rancang Bangun Termometer Tubuh Digital Berbasis Sensor NTC W1209 10k

“…Pada saat ini, banyak digunakan termometer digital berbasis sensor NTC karena relatif lebih kecil, cepat, kuat, stabil, handal, dan aman dibandingkan dengan termometer merkuri [4]- [6]. Meskipun sensor ini memiliki karakteristik yang non-linier antara suhu dengan resistansi yang dihasilkan [1], [4], [7]- [9], namun telah banyak diteliti metode-metode untuk memperbaiki ketidaklinieran tersebut. Beberapa metode yang digunakan adalah dengan menggunakan rangkaian konversi resistansi menjadi tegangan [1] seperti rangkaian Jembatan [7], [9], [10] dan rangkaian pembagi tegangan, serta dilakukan pendekatan terhadap karakteristik tersebut dengan persamaan interpolasi [11], [12].…”

Negative Temperature Coefficient Properties of Natural Clinoptilolite

“…They have formulated an electrical conduction model based on the existence of a 'free ionic conduction zone' in the crystalline lattice [11][12][13] that consists of free cationic conduction bands located just in the middle of the largest channels (that is, those channels containing super-cages). According to this model, zeolites have negative temperature coefficient behavior; indeed, their resistivity significantly decreases in a linear manner with increasing temperature [14,15]. This fully reversible phenomenon could be advantageously exploited for many technological applications, like for example the fabrication of new types of thermistors for the AC circuits [16], thermal switches/regulators for AC circuits, temperature sensors, and many other types of temperature-related devices [17][18][19][20][21][22].…”

Use of a Natural Clinoptilolite Monolith as a Negative Temperature Coefficient Thermistor

“…Zeolites are interesting electrical conductors (single-charge carrier ionic conductors) [5] that could be exploited for developing 'green' thermistors; however, to the best of our knowledge, such an application has never been proposed. A thermistor is an electrical conductor with a resistance value depending on temperature much more strictly than an ordinary resistor [6,7]. Thermistors are classified according to their conduction behaviour and the negative temperature coefficient thermistors (NTC thermistors) have lower resistance at higher temperature.…”