Temperature sensors are used just about everywhere. There are in the homes we live in, the cars we drive, the schools we learn in. They are even in planes, trains and boats. You will also find them in all sorts of electrical appliances and electronic devices. Refrigerators, stoves, hot water tanks as well as computers,…
2-wire configuration: This type of configuration has the least accuracy. There is no wire provided for compensation. Hence, in this configuration, error is more.An alternate method to compensate lead wire resistance is by connecting a 2 or 3-wire RTD to a transmitter. A transmitter converts RTD resistance into a low current signal and then transmits it…
Type K (Chromel / Alumel) Salient features: Widest operating range among all other types of thermocouple. Therefore, the most widely used thermocouple is type K. Best suited for use in oxidizing or inert atmospheres up to 1260 ̊C. Should not be used in atmosphere containing Sulfur. Should not be used in partially oxidized conditions or where…
Big differences exist between different temperature sensor or temperature measurement device types. Using one perspective, they can be simply classified into two groups, contact and non-contact. The two links below take you to descriptive pages on each type with a breakdown by more specific, detailed types under that simple, first breakout. There are also vendors…
Thermocouples, Resistance Temperature Detectors (RTDs), Thermistors, Infrared, and Semiconductor Sensors. What is a Temperature Sensor? Usually, a temperature sensor is a thermocouple or a resistance temperature detector (RTD) that gathers the temperature from a specific source and alters the collected information into an understandable type for an apparatus or an observer. Temperature sensors are used…
How RTD works A resistance temperature detector(RTD) is a temperature measuring device made of materials such as platinum whose resistance change is known at different temperatures. The R v/s T curve is used to determine the temperature. The platinum RTD’s are the most stable, linear and accurate among all the RTD’s The Common material used…
The Seebeck effect is fairly linear; that is, the voltage produced by a heated junction of two wires is directly proportional to the temperature. This means that the temperature of the metal wire junction can be determined by measuring the voltage produced. Thus, the Seebeck effect provides for us an electric method of temperature measurement.…
What are RTDs? Resistance Temperature Detectors or RTDs for short, are wire wound and thin film devices that measure temperature because of the physical principle of the positive temperature coefficient of electrical resistance of metals. The hotter they become, the larger or higher the value of their electrical resistance. They, in the case of Platinum…
Thermocouples are among the easiest temperature sensors to use and obtain and are widely used in science and industry. They are based on the Seebeck effect that occurs in electrical conductors that experience a temperature gradient along their length. They are “simple”, rugged, need no batteries, measure over very wide temperature ranges and more. They…
