This particular design has a platinum element that is surrounded by a porcelain insulator. The insulator prevents a short circuit between the wire and the metal sheath. Inconel, a nickel-iron-chromium alloy, is normally used in manufacturing the RTD sheath because of its inherent corrosion resistance. When placed in a liquid or gas medium, the Inconel sheath quickly…
With technology playing such an important role in today’s society, it’s kind of hard to imagine life without relying on certain devices and machines for performing both complex and simple tasks. Though the pace at which technology is developing is moving very rapidly, it’s a painstaking process. And while most of the technology that we…
Types of Thermocouples with Temperature Ranges & Color Codes Thermocouple can be defined as a sensor or device which is used for sensing or measuring temperature. The thermocouples are consisting of two metals or wires and the metals are known as legs. Both legs are welded together so as to create two junctions. Temperature is measured in these junctions…
What Is a Temperature Sensor? A temperature sensor is a device, usually an RTD (resistance temperature detector) or a thermocouple, that collects the data about temperature from a particular source and converts the data into understandable form for a device or an observer. Temperature sensors are used in many applications like HVand AC system environmental…
Resistance Temperature Detectors (RTD) Working Principle Thermo-resistive Temperature Measuring Devices A change in temperature causes the electrical resistance of a material to change. The resistance change is measured to infer the temperature change. There are two types of thermo-resistive measuring devices: Resistance temperature detectors (RTD) and Thermistors Resistance Temperature Detectors A resistance temperature detector (abbreviated…
Thermocouples are transducers that convert temperature directly into voltage. They are active transducers simply made by joining two different metals. It produces a voltage when the temperature in the joint changes. Types of Thermocouples: There are many different types of thermocouples, made of different types of cables and that have very different properties. The five standard…
Materials used for Thermocouples For the formation of the thermocouple at least two metals should be joined together to form two junctions. The thermocouple cannot be formed if the two junctions are not formed. Both the junctions are maintained at different temperatures. One is at the known temperature and the other at the unknown temperature.…
Principle: The principle of temperature measurement with a thermistor is that its resistance changes with temperature. Most thermistors differ from normal resistors in that they have a negative coefficient of resistance, this means that the resistance decreases with an increase in temperature. Negative (NTC) thermistors are the more common although positive (PTC) are also available.…
Introduction The thermocouple is a simple, widely used component for measuring temperature. This article provides a basic overview of thermocouples, describes common challenges encountered when designing with them, and suggests two signal conditioning solutions. The first solution combines both reference-junction compensation and signal conditioning in a single analog IC for convenience and ease of use;…
Thermocouple can be defined as a sensor or device which is used for sensing or measuring temperature. The thermocouples are consisting of two metals or wires and the metals are known as legs. Both legs are welded together so as to create two junctions. Temperature is measured in these junctions with the help of a reference of known temperature.…