Match the reference to the application.
The equipment specifies a 10 kΩ NTC with an identified curve. Preserve its coefficient definition, tolerances and probe construction when replacing it.
Review the specification →GUILCOR · NTC thermistors
10 kΩ NTC
Identify the characteristic behind the 10 kΩ label.
A common nominal value is not a universal curve. Use two resistance readings to estimate β25/85 and compare a 10 kΩ replacement with the controller’s requirement.
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Understand the reference
What defines a 10 kΩ NTC?
10 kΩNominal resistance at 25 °C
NegativeResistance decreases as temperature rises
Curve + packageBoth must match the application
The 10 kΩ nominal value appears in many control and measurement systems, with different curve families. Choosing a replacement requires its reference resistance, coefficient definition, tolerances and construction.
A 10 kΩ NTC is a negative temperature coefficient thermistor with a nominal resistance of 10,000 Ω at 25 °C (R25). The value is a reference point, not a fixed resistance during use. Select the resistance–temperature characteristic together with tolerance, excitation and the completed probe construction.
SELECTION / YOUR APPLICATION
Is 10 kΩ NTC the right starting point?
Review 15 kΩ NTC alongside 10 kΩ NTC.
Compare the nominal resistance, reference temperature and full R/T characteristic. Matching at one temperature does not establish a compatible replacement over the operating interval.
Explore 15 kΩ NTC →Keep the complete specification together.
Keep the controller reference and the specified NTC curve together. Check tolerances, cable and probe construction rather than selecting by resistance or connector alone.
Prepare your enquiry →These links support a specification review. They do not establish interchangeable parts or availability of a complete assembly.
Application check
Check a replacement at two known temperatures.
Tool input range: 100 to 1e+06
Tool input range: 1 to 1e+06
Tool input range: 1000 to 6000
Enter equilibrated resistance measurements at 25 °C and 85 °C. The tool estimates B25/85 and shows deviations from a 10 kΩ reference and your controller’s β requirement.
Estimated B₂₅/₈₅
R₂₅ deviation
β deviation
Reference resistance ratio
Enable JavaScript to calculate.
Temperatures must be known at the element, and excitation must not appreciably warm it. A two-point estimate does not establish the entire curve, calibration uncertainty or an assembled probe rating.
Model equationB₂₅/₈₅ = ln(R₂₅/R₈₅) / (1/298.15 − 1/358.15)
Use the controller’s actual named curve or table if available. Do not substitute B25/50 for B25/85 without checking the manufacturer’s definition.
Operating principle
Read the characteristic, not just R25.
Illustrative resistance values
| Temperature | Resistance |
|---|---|
| -20 °C | 105,384.69 Ω |
| 0 °C | 33,620.60 Ω |
| 25 °C | 10,000.00 Ω |
| 50 °C | 3,588.18 Ω |
| 85 °C | 1,086.67 Ω |
| 100 °C | 697.52 Ω |
From resistance to temperature
The constant-β approximation uses R(T) = R25 × exp[β(1/T − 1/298.15)], with absolute temperature in kelvin. It is useful for comparing circuit assumptions; a real part may need its specified R/T table or Steinhart–Hart coefficients for the required interval.
For Steinhart–Hart, 1/T = A + B ln(R) + C[ln(R)]³. Use coefficients and resistance units supplied for the selected part. A coefficient labelled B here is not automatically the same as a thermistor’s β value.
The temperatures in this example are calculation points, not an operating-temperature rating. Confirm the element, cable, seals and assembled probe limits.
Availability of a 10 kΩ element does not make every 10 kΩ probe interchangeable. Cable, seals, mounting, curve and calibration can all differ.
Selection checklist
Specify the complete sensing assembly.
Electrical and thermal requirements
- R25 tolerance and the exact R/T curve, β interval or coefficients.
- Required temperature interval and complete measurement error budget.
- Measuring current, allowable dissipation and self-heating under the actual mounting conditions.
- Response time with its stated medium, flow and test method; no universal response time follows from R25.
- Ageing, drift and environmental qualification documented for the selected part.
Mechanical and installation requirements
- Element or assembled probe dimensions, sheath and contact arrangement.
- Cable length, insulation, connector and total two-wire loop resistance.
- Sealing, media compatibility, pressure and ingress requirements where applicable.
- Controller curve support, supply, input range, loading and acquisition timing.
- Calibration points and required documentation for the final assembly.
Wiring and measurement
Connect the sensor and account for the circuit.
Example two-wire divider
Supply → fixed pull-up Rs → measurement node
Measurement node → NTC → ground
ADC measures the node relative to ground
For an unloaded input, Vout = Vs × RNTC / (Rs + RNTC). In this arrangement, warming an NTC lowers the output voltage. The element has no polarity, although an assembled cable or connector can have a specified pin assignment.
Separate electrical and thermal errors
Lead resistance, leakage, finite input impedance and sampling transients can alter the measured signal. Measuring current also dissipates power in the element: P = I²R. The approximate steady-state self-heating rise is P/δ when the dissipation factor δ applies to the actual installation.
A robust coating or sheath can improve environmental protection while changing heat transfer. Validate the completed probe in its intended medium instead of carrying over the bare element’s response figure.
Application contexts
Where to evaluate a 10 kΩ NTC.
Thermostats and HVAC
Match the controller’s configured sensor family and connection.
Water and air probes
Specify immersion or ambient construction and its response conditions.
Battery and embedded monitoring
Check the excitation, ADC and thermal contact for the chosen sensing point.
Application examples are selection contexts. Suitability and any required certification depend on the identified reference and completed assembly.
Probe construction
Choose the installation format.
Match the sensing point, medium and mounting to the probe construction. These links explore construction families; confirm the required NTC characteristic when requesting a reference.
Frequently asked questions
10 kΩ NTC questions.
Can an Arduino or ESP32 read any 10 kΩ NTC directly?
A suitable circuit and conversion are required. Verify supply and input limits, the divider, ADC behaviour and the exact sensor curve. The microcontroller name alone does not establish compatibility.
Is every 10 kΩ NTC interchangeable?
No. Match R25, the complete curve and tolerances, then verify electrical excitation, construction, cable, environmental limits and controller configuration.
Can the example values replace a product datasheet?
No. The table and tool illustrate stated assumptions. Use the selected reference’s data, curve and test conditions for specification and validation.
What information should I send for a probe request?
Include the required R25 and curve, temperature range, allowable error, medium, mounting, dimensions, cable and connector, controller input and expected quantity.
Technical background: Manufacturer guidance on sensing and readout. Example calculations are educational models with the assumptions stated above.
GUILCOR / YOUR ENQUIRY
Define your 10 kΩ NTC enquiry.
Send the electrical reference and the installation details together. A nominal resistance alone does not define the right replacement or assembled probe.
Missing a reference or datasheet?
Send the component marking, equipment reference and any photographs or documents you have. These provide a starting point for identifying what must be confirmed.
The outline helps prepare your enquiry. Copying it does not send a request.
FOUR DETAILS THAT MOVE THE DISCUSSION FORWARD
01
Sensor and controller
Part number, nominal resistance and reference temperature, R/T data or specified β interval, tolerance and controller input.
02
Measurement conditions
Operating and peak temperatures, required accuracy and response target, measured medium and exposure to moisture or cleaning.
03
Assembly and connection
Probe dimensions, mounting or insertion, cable length and insulation, connector or lead termination. Attach a drawing or photo.
04
Project and validation
Sample and production quantities, target delivery, calibration or documentation needs, and the checks required before approval.