Temperature Sensors

Kele Precision Manufacturing manufactures interchangeable NTC thermistors with a wide variety of resistance curves.  We also provide RTDs and thermocouples for those applications where they are the best choice.  Below you will find detailed information about these types of temperature sensors.  Note that any of these devices can be used in any of our standard probe housings or in your custom probe design.

NTC Thermistors
Kele Precision Manufacturing manufactures Negative Temperature Coefficient (NTC) thermistors for use in a wide variety of applications.  The resistance of NTC thermistors, which decreases as temperature increases, changes 4-6% for each degree in temperature change, making them an excellent choice for high accuracy applications and where the signal must travel long distances.  Thermistors offer very fast response times, and are also small, rugged and interchangeable in the field.

Bare Bead
Bare bead or coated chip thermistors are the most commonly used type of NTC thermistor.  They are typically placed into a probe or well and sealed in place with an epoxy or similar material.  Epoxy coated chip thermistors can be trimmed to the tight accuracy requirements needed for interchangeable thermistors.
KPM Thermistor Specifications
R25 (Ohms) Type Accuracy*
2,252 II +/- 0.36 oF
3,000 II +/- 0.36 oF
10,000 II +/- 0.36 oF
100,000 II +/- 0.36 oF
10,000 III +/- 0.36 oF
20,000 IV +/- 0.36 oF
* Over the range of 0 - 70 oC (32 - 158 oF)

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RTDs or Resistive Temperature Detectors, are ceramic devices with a thin layer of metal, typically platinum, deposited on one side.  They offer the advantage of producing a linear electrical output, which provides for simple signal processing.  Although they do not provide as large a signal as thermistors, they are often recommended where accuracy is required over a wide temperature range.
RTD Sensor Specifications
R25 (Ohms) Type Accuracy TCR
100 81 +/- 0.1% 0.00385
1,000 85 +/- 0.1% 0.00385
1,000 91 +/- 0.1% 0.00375


Link to RTD Resistance Temperature Table

Kele Precision Manufacturing can design and manufacture custom temperature and humidity products for the most demanding applications. 

 Kele Precision Manufacturing’s package includes:

Low Cost OEM supplier
Standard and custom products
Fast response time
Volume production capability
35 years of manufacturing experience
Made in the USA


  • Food Processing Equipment
  • Pool and Spa Systems
  • Industrial Process Control
  • Remote System Monitoring
  • Semiconductor Fabrication
  • Commercial Equipment


Thermistor Resistance
Temperature Table

RTD Resistance
Temperature Table



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