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Temperature sensors are instruments that measure the temperature of a provided surrounding, liquid, or object. A precise temperature reading is important for controlling and managing the relevant climate in industrial and commercial settings. Temperature sensors can be described as either contact or non-contact.
In this post, we will discuss the difference between contact temperature sensors and non-contact, as well as the benefits of each of the types.
Contact temperature sensors are an instrument that directly touches the item it is measuring the temperature of, using heat transfer via physical contact to identify the temperature. In industrial environments, these sensors are generally used to check the temperature of liquids in pipes, machinery, and various critical process variables. Thus, offering significant data for quality control and process optimization crossways different industries such as chemical processing, manufacturing, and power production.
They evaluate temperature by coming into direct touch with the object of relevance. They are the most normal temperature sensors and are employed in different industrial applications.
They work by assessing the heat energy that is transferred from the substance to the sensor. The most general types are thermistors, thermocouples, and resistance temperature detectors RTDs), which each use different methods to measure and calculate temperature.
The key difference between thermocouples, thermistors, and RTDs is the kind of material utilized to measure temperature. Thermocouples employ two different metals, thermistors utilise a semiconductor material, and RTDs employ a wire.
1. Thermocouples measure the voltage produced by two different metals when combined together. The difference in temperature between the two diverse metal wires creates an electrical current to flow, which the thermocouple evaluates.
2. Thermistors identify the resistance of a semiconductor substance when uncovered to various temperatures. As the material temperature varies, so does its electrical resistance, which is then evaluated by the thermistor.
3. Resistance Temperature Detectors or RTDs measure temperature by assessing the resistance of a wire when uncovered to various temperatures. As the temperature of the wire varies, so does its electrical resistance, which the Resistance Temperature Detector then measures.
Contact temperature sensors are generally used in conditions where precision is important and contact with the object is feasible, for example, in medical, pharmaceutical, and food processing uses.
The main benefits of these sensors are their precision and accuracy. In addition, they are not impacted by backdrop radiation and are less likely to be obstructed by dust or dirt.
Non-contact temperature sensors measure temperature without any contact with the object of relevance. They are generally referred to as infrared sensors as they use infrared radiation (heat) to assess temperature. They tend to be faster than contact sensors and are employed in a number of industrial applications.
They work by checking the amount of infrared radiation discharged through an object. They are normally used in conditions where touch with the object is not feasible, for example, in dangerous surroundings.
The different kinds of non-contact temperature sensors are infrared thermometers, thermal sensors, pyrometers, and thermographic cameras.
1. Infrared thermometers identify the temperature of an object by verifying and evaluating the heat energy, also called infrared, discharged from the object.
2. Pyrometers identify an object’s temperature by checking and measuring the infrared radiation discharged from the object.
3. Thermographic cameras assess an object’s temperature by verifying and analysing the infrared radiation emitted by the object.
The key benefits of non-contact temperature sensors are their precision, speed, and flexibility. They can measure temperature from a specified distance, making them perfect for dangerous surroundings and for measuring very high temperatures that will not be possible to measure with contact-type sensors. In addition, they are able to measure temperature from a wide variety of objects, such as solids, liquids, and gases.
In conclusion, a temperature sensor is used to measure the temperature of objects, liquids, and surroundings accurately in industrial or commercial settings. Thus, measuring temperature with electronic sensing devices like contact or non-contact temperature sensors is beneficial as even the smallest variation in degree can be identified. If you are also looking for a sensing device that can identify accurate temperature within a facility, whether commercial or industrial, you can consult Tempsense Instrument Pvt. Ltd.
