What Is a Temperature Sensor? [caption id="attachment_281" align="aligncenter" width="300"] Temperature Sensor[/caption] 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…
Continue pressing the pilot button for 30 to 60 seconds after lighting the pilot light. Release the button. If the pilot light goes out, the trouble is most likely a defective thermocouple Original Source ]]>
Thermocouples What are Thermocouples? Thermocouples are temperature sensors. They operate under the principle that the junction of two dissimilar metals (forming a closed circuit) produces a measurable voltage (electromotive force) when the two ends of the thermocouple are at different temperatures (see Figure 1). Because thermocouples have simple construction and are superior in reliability, they…
‘The world is getting warmer day by day.’ This sentence has started to crop up every now and then in our day to day lives. But seldom do we wonder what it means. What is warmer? How warm is warm? Is it hotter than hot, or just hotter than cold? To our human senses, temperature…
Temperature control in the food industry is an essential input for a variety of reasons: Optimal food storage in freezers, fridges or near ambient control Cooking control for food processing Preservation process i.e. Pasteurisation Energy cost control Food hygiene through bacterial control Storage during distribution Consistency is the secret in the recipe and the process…
Probe thermometers aren’t perfect. One of the first strikes against them comes from the manufacturers themselves, who promote the “set it and forget it” approach—suggesting that once you set the target doneness temperature, you can walk away until the alarm sounds. In our experience, there’s no substitute for checking on roasting meats visually, tactilely, and—as they…
Working Principle The working principle of thermocouple is based on three effects, discovered by Seebeck, Peltier and Thomson. They are as follows: 1) Seebeck effect: The Seebeck effect states that when two different or unlike metals are joined together at two junctions, an electromotive force (emf) is generated at the two junctions. The amount of emf…
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…