SparkFun will be closing early at 3:30 Friday 5/27 and remain closed Monday for Memorial Day (5/30). Orders placed after 2pm MT on Friday (5/27) will process and ship out on Tuesday (5/31).
Track My Order
Frequently Asked Questions
International Shipping Info
Mon-Fri, 9am to 12pm and
1pm to 5pm U.S. Mountain Time:
Chat With Us
images are CC BY-NC-SA 3.0
added to your
Description: 10K thermistor with a negative temperature coefficient. Good choice for temp-sensing applications.
Vishay part #: NTCLE100E3103JB0
Note: You get only one thermistor.
Added to your cart!
This is the same temperature sensor that is included in our [SparkFun Inventor's Kit](http://www.sparkfun.com/products/12060)…
This is a breakout board for the incredibly small TMP102 digital temperature sensor. The TMP102 is a digital sensor (I2C a.k.…
Melexis' MLX90614ESF-BAA is an infrared thermometer designed for non-contact temperature sensing. An internal 17-bit ADC and …
Detecting temperature changes has never been easier. The MCP9700 is a small thermistor type temperature sensor. This sensor w…
Resistors are a good thing, in fact, they're actually crucial in a lot of circuit designs. The only problem seems to be that …
This is a very small light sensor. A photocell changes (also called a [photodetector](http://en.wikipedia.org/wiki/Photodetec…
This is your tried and true white solderless breadboard. It has 2 power buses, 10 columns, and 30 rows - a total of 400 tie i…
This is our new Hobby Motor now with a 6mm, 10 tooth, gear to make your basic projects a little simpler to manage. It works w…
This is the new Arduino Uno R3. In addition to all the features of the previous board, the Uno now uses an ATmega16U2 instead…
At SparkFun we use many Arduinos and we're always looking for the simplest, most stable one. Each board is a bit different an…
If you've ever wondered how to control the headlight of a car from a microcontroller, a MOSFET is what you need. This is a ve…
A row of headers - break to fit. 40 pins that can be cut to any size. Used with custom PCBs or general custom headers.
This is a time saving kit of jumper wires - cut, stripped, and pre-bent for your prototyping pleasure. Included with this kit…
It's blue! It's thin! It's the Arduino Pro Mini! SparkFun's minimal design approach to Arduino. This is a 5V Arduino running …
A simple flex sensor 2.2" in length. As the sensor is flexed, the resistance across the sensor increases. Patented technology…
This is a force sensitive resistor with a square, 1.75x1.5", sensing area. This FSR will vary its resistance depending on how…
The SparkFun Soil Moisture Sensor is a simple breakout for measuring the moisture in soil and similar materials. The soil moi…
The EasyDriver is a simple to use stepper motor driver, compatible with anything that can output a digital 0 to 5V pulse (or …
This is a force sensitive resistor with a round, 0.5" diameter, sensing area. This FSR will vary its resistance depending on …
The RHT03 (also known by DHT-22) is a low cost humidity and temperature sensor with a single wire digital interface. The sens…
This sealed digital temperature probe lets you precisely measure temperatures in wet environments with a simple 1-Wire interf…
Piezo elements come in handy when you need to detect vibration or a knock. You can use these for tap or knock sensors pretty …
If you've ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. The SparkFun bi-directiona…
There are lots of trimpots out there. Some are very large, some so small they require a screwdriver. Here at SparkFun, we jus…
An absolute bargain at only 5.5 times the cost of buying the exact same component in single-unit quantities from digikey and/or mouser ($1.95 versus $0.35) … or if you buy in lots of 100, you get an even better deal at 7.9 times the cost of the same order. $156 for 100 from SparkFun, $19.70 for 100 from digikey.
Come on SF, add VALUE, not just COST.
Well here’s the value, say you need one of these, and your buying a really nifty BOB, but you don’t need to do a digikey order and with digikey you’re looking at 5-10 for shipping, so for $1.7 extra you can save 5 on the shipping. I don’t know about you, but I go to Digikey and the like for large orders of generic stuff, I made one large order from them and haven’t bought from them since, I figure 500 1k resistor wouldn’t be much, now I know it’s a life time supply =P Spark fun has a niche. the various extra stuff they carry isn’t that niche but it’s a convenience that I love because I know that this is the thermistor that will work for 99.99% of my thermistor needs I’ll gladly pay that extra $1.7 than having to sort through 12,732 results for thermistor. Haters gonna hate.
I mean, they’re not forcing you to buy this. They probably don’t make any money selling things for less than $2.
They should probably sell a 5 pack for $3 or something, or sell them with resistors so Arduino users can immediately use them. That would be nice!
Lets not just complain though, lets try to suggest improvements when we can!
The pack of 5 for $3 would be nice.
Simple library for this thermistor based from code on Arduino Playground. Download the zip file here:
Didn’t see the datasheet on the Vishay site. Anyone have better luck?
Interesting that a major company such as National Instruments buys from Sparkfun. Here is a link to one of NI’s LabView tutorials using this 10K thermistor purchased from Sparkfun. http://www.ni.com/example/31408/en/
Listed in Step 3… “What you need”:
Can someone tell me if the coating on the thermistor can withstand constant exposure to boiling water?
Not sure if this will help anyone but I had to make a blog about something so I made one on how to make an electronic thermometer. It uses a thermistor and explains some basics of it:
Hope this helps!
Anyone ever tried using this for skin temperature measurement?
I can’t get a reasonable temperature to come up. It thinks room temperature is ~107 C with the http://www.arduino.cc/playground/ComponentLib/Thermistor2 code. It’s clearly just a math problem, because maxm’s libary uses totally different multipliers.
maxm’s library looks great, but I am not enough of a coder to figure out how to make it work! Is there any “example code” or something?
This information is in the datasheet, albeit difficult to read. If I didn’t have a datasheet and were starting from scratch with an unknown thermistor, here’s how I would do it, which isn’t the only way.
Using a known good thermometer, I’d try and get on the order of five points where you record both the known temperature and the analog value coming from your thermistor circuit. Ice water (0C) and boiling water (100C) are easy, and get a few other points in between, the more evenly spaced the better.
Now if you graph those pairs of points (real temperature vs. analog value), you’ll start to see a curve. What you need is the equation of that curve, where real_temperature = f(analog_value). This is known as curve fitting. If you have (and remember) the math background, you can find a polynomial equation that fits the points. If not, there are online calculators that do the hard work for you (use a degree of 3 or 4 and be sure to hit “show graph” to see how well the curve matches the points).
When you’re done, you’ll have an equation that’s something like y = A x3 + B x2 + C x + D (where A,B,C,D are numbers that come from your curve-fitting calculations) that you can use to directly translate your analog measurement to temperature. (The datasheet uses a similar equation and provided numbers if you want to go that route.) You’ll need to use floating point numbers in the Arduino, but that’s a small price to pay. I hope this helps, good luck! =)
Whoops, sorry, I messed up. I meant that Fabio Ornellas' library looks great, not maxm’s. It’s here:
https://github.com/fornellas/sketchbook/tree/416ae0f095d1d6ba232a5951ccbb620a85386ca8/libraries/Thermistor . I think Fabio has already figured out all these constants for us, saving me (and anyone else) all the work you suggest above.
So I’m just trying to figure out how to call the library function or whatever. I’m trying “Thermistor thermistor(0)” and “thermistor.read()” and things like that (based on this tutorial: http://arduino.cc/en/Hacking/LibraryTutorial ), but I really have no idea what I’m doing.
Fabio, you’re awesome! Why did you not give us any example code? >:^( . ;^)
what is the B coefficient for this part?
This looks great!
+1 to maxm’s comment. i like the approach of putting the computation in a separate function. just know that you need to replace “Wprogram.h” with “Arduino.h” in the files.
Plus, the equation works well. Measured within 2 degrees F in both boiling water and an ice bath.
Any idea if these are waterproof?
no, water bridging between the wires alters the signal.
Arduino library for part #: NTCLE100E3103JB0. Works independently of VCC (eg. 3.3V or 5V).
Having some inexplicable difficulties with thermistor measurements (using this NTCLE100E3103JB0)
First, I breadboarded the thermistor in a voltage-divider using a 10K resistor. Fine - no problems. Then I took 2 x five ft. lengths out of an ethernet cable (measured the resistance of each strand - less than 2 Ohms - solid copper ), and put the thermistor on the extension. Now the temperature fluctuates up and down by about + and -1F. Makes no sense to me.
Any ideas anyone?
Is my simple V-divider circuit inadequate? (Arduino Uno, 5-v supply, 10K resistor, and this thermistor).
I would like to use this in conjunction with an XBee Series 2 where the voltage is 3.3v. Since the maximum voltage that can be measured on the XBee analog pins is 1.2v, based on the O'Reilly sensor networks book, a quick way to bring the max measured voltage down to 1.2v is to have fixed resistor that is approximately double that of the maximum resistance of the sensor. However, the advertised resistance of these types of thermistors is at room temperature or 25C (in this case 10K Ohms). Does anyone know what the maximum resistance of this sensor is? I couldn’t figure it out from the Vishay datasheet since they don’t show the specs for the 10k at 25C model.
Nevermind. Found the PDF mentioned by TomA above (was page 10 actually). Resistance of this thermistor ranges from 332,094 Ohms (-45C) to 182.6 Ohms (150C).
Here’s the code for measuring temperature with Arduino for those who need it.
I’m measuring the voltage drop across the thermistor instead of the 10K resistor.
remember to include the math.h library
float ts1 = analogRead(A0);
ts1 = ts1 * 5 / 1023;
ts1 = ts1/((5 - ts1)/10000);
ts1 = 1 / ((.003354016)+(.0002569850(log(ts1/10000)))+(.000002620131(pow((log(ts1/10000)),2)))+(.00000006383091*(pow((log(ts1/10000)),3))));
ts1 = ts1 - 273.15;
Serial.print(“Sensor 1 Temperature = ”);
Serial.println(“ Celcius ”);
Stupid question, but does this come with one or three thermistors?
Only one, according to the product description.
Like the above post, it works great with the arduino code.
My comment on it is why doesn’t the equation provided in the .pdf work? And why does it have an extra log (as compared to the Steinhart-Hart equation)
What do you mean the equation in the datasheet doesn’t work? The equation is the “extended” Steinhart-Hart, so it has an extra squared term, but it’s essentially the same.
Worked great with the arduino code (and schematic) from here: http://www.arduino.cc/playground/ComponentLib/Thermistor2
To save some of you time the ….3103 thermistor data of R vs. Temp. is on page 11 of the Thermistor23816403-1.pdf file ( Vishay’s page 84).
I think you meant:
No reviews yet.
Forgot your password?
No account? Register one!