Fast response NTC thermistor for Transformers & Motor, blue epoxy bead
Fast response NTC thermistor for Transformers & Motor, blue epoxy bead is made of epoxy coated temp. probe and electric wire. It's widely used for over heating protection of transformer coils. It's manufactured from Hefei Jingpu Sensor Technology Co.,Ltd.
Quick details
|
Item name |
NTC thermistor |
| Rated resistance at 25ºC |
2.1KΩ±2% |
| Beta value |
3977K |
| probe size |
≤3mm |
| wire insulation materials |
PVC / PTFE / TPE /TPU |
marks: custom made components, custom wire length available.
| Resistance at 25ºC |
Beta value |
Resistance Tolerance |
Type of Lead |
| 2kΩ |
3560K |
±2%, ±5% |
0.16x7mm
Conductor Diameter
PTFE insulated
Multistrand Copper Wire
Yellow/Blue |
| 2.1kΩ |
3977K |
| 2.8kΩ |
3977K |
| 3kΩ |
3820K |
| 5kΩ |
3977K |
| 10kΩ |
3977K |
| 20kΩ |
3977K |
The temperature sensor for your professional needs. What ever parts you need for your project, the xx brings your digital object to reality better than ever.
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Product features
▪ Advanced technology: smart sensors cable adopts sensitive and reliable NTC thermistor and connected by PVC wire. 1 meter lead wire length (3.28ft), available for remote temperature measuring and controlling.
▪ Wide measuring range: our temperature probe is able to tolerate the widest measuring range (-25ºC to 125ºC)
▪ Wide application: This multifunctional test probes can be used in over-heat protection of transformer coils.
▪ Coated thermistor Chip.
▪ PTFE-insulated wires, AWG 26.
▪ Coated Diameter 3.5mm Max.
Other features
Lower Temperature: -40ºC
Upper Temperature: 140ºC
Maximum Permissible Current at 25ºC: 10 mAmp
Resistance Tolerance (△R/RN): ±0.5%, ±1%, ±2%, ±5%)
Rated Temperature (TN): 25ºC
Beta Tolerance (△β/βN): ±1%, ±2%, ±3%,
Dissipation factor in air (δth): approx 1.5mW/K
Thermal cooling time constant in air: approx 22.5mJ/K
Heat capacity (Cth): approx 22.5mJ/K
Thermal Response time in oil: approx 15s
Reliability Dara
| Test |
Standard |
Test Conditions |
Change in R25 (△R25/R25) |
Remarks |
| Storage in dry heat |
IEC 68-2-2 |
Storage at upper category temperature
T:140ºC
t: 500 h |
<1% |
No visible damage |
| Storage in damp heat steady state |
IEC 68-2-3 |
Temperature of air:40 ºC
Relative humidity of air:93%
Duration: 56days |
<1% |
No visible damage |
| Rapid temperature cycling |
IEC 68-2-14 |
Lower test temperature: -55ºC
Upper test temperature: 155ºC
Number of cycles: 100 |
<1% |
No visible damage |
| Long-term stability |
|
Temperature: +100ºC
Duration: 2000 h |
<2% |
No visible damage |
More product pictures
Please provide the following information before order.
1. Application and working environment (whether to waterproof, acid or alkali and other)
2. Accuracy (±1%, ±2%)
3. Temperature range (temperature rnage no more than ...ºC)
4. Wire material and length (common PVC; silicone, PTFE)
5. How to deal with end of line (hung tin, with connector)
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