Skip to Content

 470KΩ 
 Temperature sensors 

Ultra high-resistance NTC thermistor for specialized temperature monitoring in low-power electronics.

 Maximum precision
+/- 0,20°K

 Minimum temperature
-50°C

 Maximum temperature
+150°C

 Minimum dimensions
2 x 10

Response time

Medium

 Drift

Low

 Self-warming
Low

Price
Low

What is a NTC 470KΩ sensor ?Operating principleTechnical SpecificationsWiring ConfigurationSelf-warmingApplication areas

What is a NTC 470KΩ sensor ?

The NTC 470 kΩ is a thermistor with an extremely high nominal resistance (470,000 Ω at 25 °C).

This type of sensor is used when power consumption must be minimal while ensuring good accuracy around ambient temperature.

It is perfectly suited for long-term monitoring systems, wireless sensors, and portable medical devices.

Operating principle

Its resistance decreases exponentially with temperature according to:

R(T) = R₂₅ × e^{β (1/T - 1/T₂₅)}

where:

  • R₂₅ = 470000 Ω 
  • β ≈ 3950 K
  • T in kelvins

The relationship is numerically compensated using the formula β or the Steinhart–Hart equation to linearize the R/T curve.

Technical Specifications

Parameter
 Typical value

Nominal resistance (25 °C)

 470 000 Ω ±1 %
Constant β 3950 K

Sensitive material

Metallic oxide (Mn, Ni, Co)

Type of case Epoxy / glass

Maximum measurement current

0,01 mA

Response time

0.3 to 1 s

Linearity

Exponential

Operating temperature

−50 → +150 °C

Lifetime

100,000 thermal cycles

Wiring Configuration

The NTC 470 kΩ is mounted in a voltage divider connected to a high-impedance analog input.

It is often used with a 24-bit converter for very low current measurements.

 +Vcc
   │
  [Rfixe]
   │────► ADC (µC)
  [NTC 470kΩ]
   │
  GND

Self-warming

The dissipated energy is minimal (< 0.005 °C/mW), allowing for stable measurements even over long sampling periods.

Application areas

🔋 Low-power wireless sensors (IoT, BLE)

🩺 Portable medical instrumentation

🌡️ Precision environmental measurement

🧠 Data loggers or calibration systems

⚙️ High-impedance measurement electronics


Should I choose a 470KΩ sensor ?

Strengths points

  • 🔋 Ultra-low consumption
         → With a resistance of 470 kΩ, the measurement current becomes almost zero: perfect for autonomous sensors, IoT, and wearable devices.
  • 🎯 Great thermal stability
         → Excellent drift (< ±0.05 K/year), ensuring consistent measurement reliability over several years.
  • 💧 Negligible self-heating
         → Thermal dissipation less than 0.005 °C/mW — no influence on the measurement, even in continuous reading.
470kΩ sensors

Weaknesses points

  • 🐢 Reactivity a bit slower
    → The very high impedance slightly extends the stabilization time in low current systems.
  • 🧮 Requires a high impedance reading
    → Must be paired with a 16–24 bit ADC to ensure signal accuracy.
  • 🔋 Reduced sensitivity to high temperature
    → Beyond 100 °C, the resistance variation becomes small, limiting accuracy without software correction.

Useful information

Here is some useful information regarding the 470KΩ sensors.

(NTC 470 kΩ at 25 °C, beta constant = 3950 K)

Temperature (°C) Resistance (Ω) Temperature (°C) Resistance (Ω)
−50 11 723 000 60 137 000
−40 7 400 000 70 103 000
−30 4 760 000 80 79 000
−20 3 130 000 90 61 000
−10 2 090 000 100 48 000
0 1 420 000 110 38 000
10 980 000 120 30 000
20 690 000 130 24 000
25 470 000 140 19 000
30 323 000 150 15 000
40 225 000 160 12 000
50 160 000 170 10 000

💡 Between 0 °C and 100 °C, the resistance drops by a factor of about 30 — typical of an NTC with β ≈ 3950 K.

Class / Tolerance
 Tolerance at 25 °C (R25)
 Max error on T° (−40 → +125 °C)
 Typical usage
±1 % ±4 700 Ω ±0,2 K Scientific and medical measures
±2 % ±9 400 Ω ±0,4 K Embedded systems
±3 % ±14 100 Ω ±0,6 K IoT Sensors and Home Automation
±5 % ±23 500 Ω ±1 K Consumer devices
🔹 Glass-encapsulated models are recommended for a drift < 0.05 K/year and superior mechanical strength.

Complete equation:

1/T = A + B · ln(R) + C · [ln(R)]³

Typical coefficients for NTC 470 kΩ (β = 3950 K):

  • A = 1.4051 × 10⁻³
  • B = 2.369 × 10⁻⁴
  • C = 1.019 × 10⁻⁷


🔹 Example 1: Temperature from R

R = 323,000 Ω

ln(323000) = 12,69

1/T = 1,4051e−3 + 2,369e−4 (12,69) + 1,019e−7 (12,69)³ = 3,05e−3

T = 1 / 3,05e−3 = 327,8 K = 54,6 °C

✅ Measured temperature ≈ 55 °C


🔹 Example 2: Resistance from T

T = 80 °C = 353.15 K

R = R₂₅ · e^(β(1/T − 1/T₂₅))

R = 470000 · e^(3950 × (1/353,15 − 1/298,15)) = 79000 Ω

✅ Expected resistance: ≈ 79 kΩ

The NTC 470 kΩ is integrated into a voltage divider and read via a high-impedance ADC converter (16–24 bits).

Its very high resistance makes it ideal for ultra-low current measurement systems.

🔹 Typical components

Component
 Function
NTC 470 kΩ Temperature sensor
R fixed (470 kΩ)
 Reference resistance
Microcontroller (ADC)
 High impedance analog lecture
100 nF capacitor
 Noise filtering
Power Supply 3.3 / 5 V
 Tension stable
🔹 Functional diagram (ASCII)
  +3.3V / +5V
       │
     [Rfixe]
       │────► ADC (microcontroller input)
     [NTC 470kΩ]
       │
      GND
💡 This sensor is ideal for very low power applications and stable measurements at room temperature, with almost zero drift over several years.

 We integrate any sensor into any probe 

Smooth tube probe

 Smooth tube 

Waterproof probe

 Waterproof

Bayonet probe

 Bayonet

Slot probe

 Slot

Ambient probe

 Atmosphere

Connection head probe

Termal block

Stick-in probe

Stick-in

Thread probe

Thread

Contact probe

Contact

Jacketed probe

Jacketed

PCBA Design

PCBA design

Winding probe

Winding

More than 1,000,000 probes delivered in 2025

Contact us for a personalized offer

Contact Us

Need a NTC 470KΩ sensor?

Whether you need a few parts for a prototype or several hundred for a production line, we support you at every step.

Submit