{"data":{"allPosts":{"posts":[{"post":{"body":{"id":"a8fa66cf-de8d-560c-a480-585b971ab1c4","text":"Are you looking for more common sense? Spoiler alert - Selco Products manufactures sensors too!\n\nAlong with a wide variety of electro-mechanical thermostats, there’s a whole world out there of temperature components that just sense. \n\nBy just sense, unlike thermostats that are sensing temperature AND opening/closing circuits accordingly, these sensors need some brains at the end of their wires to translate their reading into something that can be acted on and utilized.\n\nThermistors, Thermocouples, and RTD’s are all sensor options that provide a resistance or voltage output, but what makes them different than other components, such as a resistor?  \n\nThese sensors’ resistance and voltage outputs mean something, that when paired with electronics utilizing the [corresponding RT (Resistance-Temperature) tables](https://s3-us-west-2.amazonaws.com/selco-products-assets-production/resources/rt_tables.pdf \"RT (Resistance-Temperature) Table\") or lookup tables, Base resistances and Beta value’s, etc., lets the system know what temperature the sensor is reading.\n\n![Common Sense Fig 7A Graph](//images.ctfassets.net/mavy5e93vdj4/1vVWhWxBwQFwVo0nTEHhwa/d7728f617c7140ef148fed898d922472/Common_Sense_Fig_7A_Graph.png)\n\nFor example, say you have a thermistor sensing the air temperature inside of a refrigerator.  Someone leaves the door open too long so the air temperature starts increasing, thermistors (being NTC, or Negative Temperature Coefficient devices) “sense” this increase in air temperature by the reported resistance value decreasing.  The electronics read this decrease in resistance and know the fridge is warming up, so it starts the cooling process to bring the temperature back down.  \n\nWith this information...DING dinner’s ready, CRASH the ice-maker kicks on, or RUMBLE-RUMBLE the compressor in your fridge starts up!\n\nSelco can help provide all the information you need to correlate these readings and get the most out of your sensors…want to get even more technology? Check out what electronic temperature controls or “brains” needed for your next temperature control project here.\n\n","mdx":{"code":{"body":"function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }\n\nfunction _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }\n\nreturn ((_ref) => {\n  let {\n    components\n  } = _ref,\n      props = _objectWithoutProperties(_ref, [\"components\"]);\n\n  return React.createElement(MDXTag, {\n    name: \"wrapper\",\n    components: components\n  }, React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `Are you looking for more common sense? Spoiler alert - Selco Products manufactures sensors too!`), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `Along with a wide variety of electro-mechanical thermostats, there’s a whole world out there of temperature components that just sense. `), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `By just sense, unlike thermostats that are sensing temperature AND opening/closing circuits accordingly, these sensors need some brains at the end of their wires to translate their reading into something that can be acted on and utilized.`), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `Thermistors, Thermocouples, and RTD’s are all sensor options that provide a resistance or voltage output, but what makes them different than other components, such as a resistor?  `), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `These sensors’ resistance and voltage outputs mean something, that when paired with electronics utilizing the `, React.createElement(MDXTag, {\n    name: \"a\",\n    components: components,\n    parentName: \"p\",\n    props: {\n      \"href\": \"https://s3-us-west-2.amazonaws.com/selco-products-assets-production/resources/rt_tables.pdf\",\n      \"title\": \"RT (Resistance-Temperature) Table\"\n    }\n  }, `corresponding RT (Resistance-Temperature) tables`), ` or lookup tables, Base resistances and Beta value’s, etc., lets the system know what temperature the sensor is reading.`), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, React.createElement(MDXTag, {\n    name: \"img\",\n    components: components,\n    parentName: \"p\",\n    props: {\n      \"src\": \"//images.ctfassets.net/mavy5e93vdj4/1vVWhWxBwQFwVo0nTEHhwa/d7728f617c7140ef148fed898d922472/Common_Sense_Fig_7A_Graph.png\",\n      \"alt\": \"Common Sense Fig 7A Graph\"\n    }\n  })), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `For example, say you have a thermistor sensing the air temperature inside of a refrigerator.  Someone leaves the door open too long so the air temperature starts increasing, thermistors (being NTC, or Negative Temperature Coefficient devices) “sense” this increase in air temperature by the reported resistance value decreasing.  The electronics read this decrease in resistance and know the fridge is warming up, so it starts the cooling process to bring the temperature back down.  `), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `With this information...DING dinner’s ready, CRASH the ice-maker kicks on, or RUMBLE-RUMBLE the compressor in your fridge starts up!`), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `Selco can help provide all the information you need to correlate these readings and get the most out of your sensors…want to get even more technology? Check out what electronic temperature controls or “brains” needed for your next temperature control project here.`));\n});","scope":"/opt/build/repo/.cache/gatsby-mdx/mdx-scopes-dir/3010b3badc54a9dfa4a4c80e419a41b2.js"},"excerpt":"Are you looking for more common sense? Spoiler alert - Selco Products manufactures sensors too! Along with a wide variety of electro…"}},"heroImage":{"fluid":{"aspectRatio":1.7783094098883572,"src":"//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=1115&h=627&q=90&fit=thumb&f=top","srcSet":"//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=279&h=157&q=90&fit=thumb&f=top 279w,\n//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=558&h=314&q=90&fit=thumb&f=top 558w,\n//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=900&h=506&q=90&fit=thumb&f=top 900w","srcWebp":"//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=1115&h=627&q=90&fm=webp&fit=thumb&f=top","srcSetWebp":"//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=279&h=157&q=90&fm=webp&fit=thumb&f=top 279w,\n//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=558&h=314&q=90&fm=webp&fit=thumb&f=top 558w,\n//images.ctfassets.net/mavy5e93vdj4/2whqlkJafVTY1l39jrXgiS/89fbfe9250b83489216890fdb99dcaef/Common_Sense_Hero_Image.jpg?w=900&h=506&q=90&fm=webp&fit=thumb&f=top 900w","sizes":"(max-width: 1115px) 100vw, 1115px"}},"author":{"name":"Selco Products"},"date":"September 30","id":"65a8bee1-a27d-5343-a1c7-f4103f015d41","slug":"common-temperature-sense","tags":[{"name":"ask the expert","slug":"ask-the-expert"},{"name":"how it works","slug":"how-it-works"},{"name":"resistance","slug":"resistance"},{"name":"sensor","slug":"sensor"},{"name":"thermistor","slug":"thermistor"}],"title":"Common [Temperature] Sense?"}},{"post":{"body":{"id":"cffef35f-a3e7-5953-9128-725bd3f87756","text":"__ASK OUR EXPERT - What Sensor Do I Need?__\n\nHow do you know which sensor is best for your particular application? It depends on your needs!\n\nThis post will go over three main types of non-mechanical sensors: they are the [NTC thermistor](https://www.selcoproducts.com/ntc-thermistors \"NTC thermistor\"), the [thermocouple](https://www.selcoproducts.com/thermocouple-and-rtd-assemblies \"thermocouple\"), and the [RTD](https://www.selcoproducts.com/thermocouple-and-rtd-assemblies \"RTD\"). We provide you some information to help you determine which one is best for your application.\n\n__Negative Temperature Coefficient (NTC) thermistor__\n![IN-01](//images.ctfassets.net/mavy5e93vdj4/6VQACqxcjtUWeG6mth3o4n/4d5fbe9a227a5338076b97af79c3054b/IN-01.jpg)\nAn [NTC thermistor](https://www.selcoproducts.com/products/in-series \"NTC thermistor\") measures temperature based on the resistance changes of a ceramic or polymer resistor. This resistance is read by an electronic control and converted into a temperature reading.\n\n____ Thermocouple____\n![Thermocouple3](//images.ctfassets.net/mavy5e93vdj4/2MP002LNclu9fN6osxvbBi/7df5112eccd0894e94b1fb32a7a91325/Thermocouple3.png)\nA [thermocouple](https://www.selcoproducts.com/thermocouple-and-rtd-assemblies \"thermocouple\") uses two wires made up of different materials to produce a voltage. This voltage changes relative to the temperature, so the electronic control can read the voltage and convert it to a temperature reading. There are type J and type K.\n\n__Resistance Temperature Detector (RTD)__\n![RTD1](//images.ctfassets.net/mavy5e93vdj4/2p4cwJvq3C9qHt2bzDtKl/887f5483b64fc8d2f9e2aae342d2b0c5/RTD1.png)\nAn [RTD](https://www.selcoproducts.com/thermocouple-and-rtd-assemblies \"RTD\") is like an NTC thermistor, but uses a metal resistance wire element. They can be manufactured using platinum RTDs.\n\n*So which one do I need?*\nIt depends on what is most important in your application. Do you need something very high temp? The [thermocouple](https://www.selcoproducts.com/thermocouple-and-rtd-assemblies \"thermocouple\") can handle higher temperatures than the [NTC thermistor](https://www.selcoproducts.com/ntc-thermistors \"NTC thermistor\") and [RTD](https://www.selcoproducts.com/thermocouple-and-rtd-assemblies \"RTD\"). Is accuracy key? Try an NTC thermistor or an RTD as they tend to have better accuracy than thermocouples. Response time critical? An NTC thermistor or thermocouple could work well. Do you need long-term stability? RTD’s are the best (though likely also the most expensive) option.\n\n__Selection chart__\n\n| Sensor Type      | Temp Range | Accuracy   | Response Time* | Price (USD)|\n| -------------    | ---------- | ---------- | ---------- | ---------- |\n| NTC Thermistor | -50-300°C | ±0.05-1.0°C over an accuracy range| 0.4-5 seconds| $-$$ |\n| Thermocouple| -100-1750°C | ±1.1-2.2°C      | 0.1-10 seconds       | $-$$       |\n| Platinum RTD      | -200-1000°C       | ±0.03-0.3°C at 0°C      | 5-50 seconds| $$$     |\n\n*Based on bare elements. Element packaging, housing and environment can affect response time. \n\n__Typical applications for each sensor type__\n[Thermocouples](https://www.selcoproducts.com/thermocouple-and-rtd-assemblies \"Thermocouples\") are most commonly used in industrial settings. Thermocouples are vibration resistant, relatively low cost, can measure high temperatures, and have fast response times. RTDs are also suitable for high temperatures, and have the added bonus of a high immunity to electrical noise. This makes the RTD a great option for industrial automation environments or anywhere else you would find generators, motors and other high voltage equipment. Lastly, NTC thermistors are best when consistent accuracy is needed over a specific temperature range (RTDs and thermocouples measure their accuracy at 0°C only). NTC thermistors also have the best sensitivity, and are typically 2-3 times less expensive than RTD’s.\n\nArmed with this new knowledge, we hope you are better able to decide which sensor will work best for your specific application. Still not sure or have more questions? Feel free to contact Selco Products and check with a technical expert here. \n\n\nThermally Yours,\nSelco Thermal Experts\n","mdx":{"code":{"body":"function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }\n\nfunction _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }\n\nreturn ((_ref) => {\n  let {\n    components\n  } = _ref,\n      props = _objectWithoutProperties(_ref, [\"components\"]);\n\n  return React.createElement(MDXTag, {\n    name: \"wrapper\",\n    components: components\n  }, React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, React.createElement(MDXTag, {\n    name: \"strong\",\n    components: components,\n    parentName: \"p\"\n  }, `ASK OUR EXPERT - What Sensor Do I Need?`)), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `How do you know which sensor is best for your particular application? 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They can be manufactured using platinum RTDs.`), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, React.createElement(MDXTag, {\n    name: \"em\",\n    components: components,\n    parentName: \"p\"\n  }, `So which one do I need?`), `\nIt depends on what is most important in your application. Do you need something very high temp? 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Element packaging, housing and environment can affect response time. `), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, React.createElement(MDXTag, {\n    name: \"strong\",\n    components: components,\n    parentName: \"p\"\n  }, `Typical applications for each sensor type`), React.createElement(MDXTag, {\n    name: \"a\",\n    components: components,\n    parentName: \"p\",\n    props: {\n      \"href\": \"https://www.selcoproducts.com/thermocouple-and-rtd-assemblies\",\n      \"title\": \"Thermocouples\"\n    }\n  }, `Thermocouples`), ` are most commonly used in industrial settings. Thermocouples are vibration resistant, relatively low cost, can measure high temperatures, and have fast response times. RTDs are also suitable for high temperatures, and have the added bonus of a high immunity to electrical noise. This makes the RTD a great option for industrial automation environments or anywhere else you would find generators, motors and other high voltage equipment. Lastly, NTC thermistors are best when consistent accuracy is needed over a specific temperature range (RTDs and thermocouples measure their accuracy at 0°C only). NTC thermistors also have the best sensitivity, and are typically 2-3 times less expensive than RTD’s.`), React.createElement(MDXTag, {\n    name: \"p\",\n    components: components\n  }, `Armed with this new knowledge, we hope you are better able to decide which sensor will work best for your specific application. Still not sure or have more questions? 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