32 Grade High Accuracy +/-0.1C NTC Thermistor With Enameled Wire For Thermometer 
Description Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor High Precision NTC Thermistors for Extremely Accurate Temperature Measurement The MF51E NTC Thermistors were specially designed for use in electronic thermometers which require better than average accuracy. The extremely small size allows the thermistor to respond very quickly to tiny changes in temperature. The MF51E can be supplied un-calibrated with standard tolerances or calibrated and grouped according to R at 37°C±0.01% for extreme interchangeability so as to eliminate the need for other calibrations.
Features Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor■ Small Size and fast response and light weight
■ Long term Stability and Reliability
■ High accuracy and Interchangeability
■ High Sensitivity and Fast thermal response
■ Thermally Conductive Epoxy coated
■ Available tolerances: ±0.5%, ±1%, ±2%, ±3% and ±5%
■ B Value tolerances: ±0.5%, ±1.0% and ±2.0%
■ Resistance calibration available at 37°C ±0.01% (see table for details of grouping)
■ Long-term Stability and Reliability
■ Excellent Tolerance and Interchangeability
■ Available in all popular resistance values
■ Dissipation Constant ≥0.7mW/°C
■ Time Constant of ≤3.2 seconds
■ Rated Power: 3.5mW
■ Operating Temperature Range
Applications Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor 
Fire alarm, computer, copier, electronic calendar, thermometer, temperature control instrument and temperature compensation.
■ Temperature sensing , control and compensation
■ Electronic thermometer, Medical equipment and patient monitoring
■ General Instrumentation applications
■ Electronic Thermometers
■ Medical Equipment and Patient
Specification Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor
| Part No. | Nominal resistance
R 25℃ | B Value
(R25/50℃) | Rated power
(mw) | Dissipation
(mW/℃) | Thermal time constant
(S) | Operating
temp.
(℃) |
Range
(KΩ) | Tolerance
(%) | Nominal value
(K) | Tolerance
(%) |
MF51E3270
MF51E3380
MF51E3470
MF51E3600
MF51E3950
MF51E4000
MF51E4050
MF51E4150
MF51E4300
MF51E4500 | 0.2-20
0.5-50
0.5-50
1-100
5-100
5-100
5-200
10-250
20-1000
20-1000 | E+/-0.5
F+/-1
G+/-2
H+/-3
J+/-5 | 3270
3380
3470
3600
3950
4000
4050
4150
4300
4500 | E+/-0.5
F+/-1
G+/-2 | 3.5 |
≥ 0.7 |
≤ 3.2 | -40℃ - +100℃ |
Size Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor(Unit:mm)
| Dimension | D max | L 1 max | L 1
+/- 3 | L 2
+/- 1 | d
+/- 0.05 |
| Normal size | 1.6 | 4.0 | 100 | 3 | 0.2 |
| 1.6 | Customer Specified |
Resistance Calibration at 37℃ +/- 0.005℃ of Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor MF51E303E3950
R37℃=30.025KΩ±2.664% B30/45=3950K±0.5%
| Category | (KΩ) | Category | (KΩ) | Category | (KΩ) | Category | (KΩ) |
| 1 | 29.275KΩ | 9 | 29.675 KΩ | 17 | 30.075 KΩ | 25 | 30.475 KΩ |
| 2 | 29.325 KΩ | 10 | 29.725 KΩ | 18 | 30.125 KΩ | 26 | 30.525 KΩ |
| 3 | 29.375 KΩ | 11 | 29.775 KΩ | 19 | 30.175 KΩ | 27 | 30.575 KΩ |
| 4 | 29.425 KΩ | 12 | 29.825 KΩ | 20 | 30.225 KΩ | 28 | 30.625 KΩ |
| 5 | 29.475 KΩ | 13 | 29.875 KΩ | 21 | 30.275 KΩ | 29 | 30.675 KΩ |
| 6 | 29.525 KΩ | 14 | 29.925 KΩ | 22 | 30.325 KΩ | 30 | 30.725 KΩ |
| 7 | 29.575 KΩ | 15 | 29.975 KΩ | 23 | 30.375 KΩ | 31 | 30.775 KΩ |
| 8 | 29.625 KΩ | 16 | 30.025 KΩ | 24 | 30.425 KΩ | 32 | 30.825 KΩ |
STORAGE CONDITIONS Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor
Temperature: -10℃～+40℃
Humidity: ≤70%RH
Term: ≤6 months (First-in/ First-out)
Place:
Do not exposing the components to the following conditions, otherwise, it may result in deterioration of characteristics.
1) Corrosive gas or deoxidizing gas.
2) Flammable and explosive gases.
3) Oil, water and chemical liquid.
4) Under the sunlight.
Handling after seal open: After unpacking of the minimum package, reseal it promptly or store it inside a sealed container with a drying agent.
Mechanical Requirements Of The 32 Grade High Accuracy +/-0.1C NTC Thermistor
| Item | Requirements | Test Method |
| 1.Solder-ability | The terminals shall be uniformly tinned, and its area≥95% | Dipping the NTC terminals to a depth of 15mm in a soldering bath of 245±5℃ and to the place of 6mm far from NTC body for 3±0.5s (See IEC68-2-20 /GB2423.28 Ta ) |
| 2.Resistance To Soldering Heat | No visible mechanical damage.
ΔR/RN ≤20%
(ΔR =∣RN-RN'∣) | Dipping the NTC terminals to a depth of 15mm in a soldering bath of 260±5℃ and to the place for 6mm below from NTC body for 3±0.5s.After recovering4-5h under 25±2℃. The rated zero power resistance value RN' shall be measured.
(See IEC68-2-20 /GB2423.28 Tb) |
| 3.Strength of lead terminal | No break out
ΔR/RN ≤20%
(ΔR =∣RN-RN'∣) | Fasten the body and apply a force gradually to each lead until 10N and then keep for 10sec, Hold body and apply a force to each lead until 90°slowly at 5N in the direction of lead axis and then keep for 10sec, and do this in the opposite direction repeat for other terminal. After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured.
(See IEC68-2-21/GB2423.29 Ua / Ub) |
MF51E temperature-measuring NTC thermistor for electronic thermometer
Electronic thermometers have become a daily necessity in hospitals, clinics, and homes because they can help us know if we have problems and help treat them. Electronic thermometers are popular because they are more convenient than mercury thermometers, take shorter measurements, and are safer to use. The most important component of an electronic thermometer is the temperature sensor, which includes a temperature sensor, temperature bar, display screen, switch, button, and battery cover.
The temperature sensor in the electronic thermometer requires high resolution, high precision, and fast response time. What material can be used as the temperature sensor? Common temperature sensors are thermistor sensors, thermistor sensors, thermocouple temperature sensors. Thermistor sensor, the majority is to use semiconductor materials, because of the characteristics of semiconductor materials are better than other materials, such as semiconductor thermistor materials than other materials have a better temperature coefficient of resistance and high resistivity, therefore made of semiconductor thermistor materials than other thermistor temperature sensor material temperature sensors will have more high sensitivity, so use this kind of sensor to make a slight variation in the thermometer is easier to measure temperature.
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Fire alarm, computer, copier, electronic calendar, thermometer, temperature control instrument and temperature compensation.
The temperature sensor in the electronic thermometer requires high resolution, high precision, and fast response time. What material can be used as the temperature sensor? Common temperature sensors are thermistor sensors, thermistor sensors, thermocouple temperature sensors. Thermistor sensor, the majority is to use semiconductor materials, because of the characteristics of semiconductor materials are better than other materials, such as semiconductor thermistor materials than other materials have a better temperature coefficient of resistance and high resistivity, therefore made of semiconductor thermistor materials than other thermistor temperature sensor material temperature sensors will have more high sensitivity, so use this kind of sensor to make a slight variation in the thermometer is easier to measure temperature.