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tutorials:learn:sensors:thermistor.html [2011/06/07 19:23]
daigo
tutorials:learn:sensors:thermistor.html [2016/01/28 18:05] (current)
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   *They work at any voltage (digital sensors require 3 or 5V logic). ​   *They work at any voltage (digital sensors require 3 or 5V logic). ​
   *Compared to a thermocouple,​ they don't require an amplifier to read the minute voltages - you can use any microcontroller to read a thermistor. ​   *Compared to a thermocouple,​ they don't require an amplifier to read the minute voltages - you can use any microcontroller to read a thermistor. ​
-  *They can also be incredibly accurate for the price. For example, the 10K 1% thermistor in the shop is good for measuring with ±0.1°C accuracy! (Assuming you have an accurate enough analog converter)+  *They can also be incredibly accurate for the price. For example, the 10K 1% thermistor in the shop is good for measuring with ±0.25°C accuracy! (Assuming you have an accurate enough analog converter)
   *They are difficult to break or damage - they are much simpler and more reliable   *They are difficult to break or damage - they are much simpler and more reliable
  
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 <class center> <class center>
-[[http://​www.adafruit.com/​products/​372|You can pick up a 10K 1% waterproof thermistor in the Adafruit shop]]+**[[http://​www.adafruit.com/​products/​372|You can pick up a 10K 1% waterproof thermistor in the Adafruit shop]]**
 </​class>​ </​class>​
  
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 [[http://​www.adafruit.com/​products/​372|Here are technical details for the thermistor in our shop]] [[http://​www.adafruit.com/​products/​372|Here are technical details for the thermistor in our shop]]
  
-    * Resistance at 25°C: 10K ±1% +    ​* **Resistance at 25°C:** 10K ±1% 
-    * B25/50: 3950 ±1% +    ​* **B25/50:** 3950 ±1% 
-    * Thermal time constant <= 15 seconds +    ​* **Thermal time constant** <= 15 seconds 
-    * Thermistor temperature range -55°C to 125°C +    ​* **Thermistor temperature range** -55°C to 125°C 
-    * Wire temperature range -55°C to 105°C +    ​* **Wire temperature range** -55°C to 105°C 
-    * 28 AWG PVC Wire +    ​* **28 AWG PVC Wire** 
-    * Diameter: 3.5mm/​0.13in +    ​* **Diameter: 3.5mm/​0.13in** 
-    * Length: 18in/45cm +    ​* **Length: 18in/45cm** 
-    * Resistance/​Temperature table+    * [[http://​www.adafruit.com/​datasheets/​103_3950_lookuptable.pdf|Resistance/​Temperature table]]
  
 Note that even though the thermistor can go up to 125°C the cable itself maxes out at 105°C so this thermistor is not good for measuring very very hot liquids Note that even though the thermistor can go up to 125°C the cable itself maxes out at 105°C so this thermistor is not good for measuring very very hot liquids
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