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Product Details:
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| Features: | Using Double-Layer Encapsulation Process | Application: | Various Home Appliances |
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| Type: | Thermistor | Working Temperature Range(°C): | -10 To +105c |
| Resistance Value: | 5K,10K,20K,50K,100K | Dissipation Factor(mw/°C): | 1-2 (in Still Air) |
| Highlight: | Double Layer NTC Temperature Sensor,Moistureproof NTC Temperature Sensor,Multi Scene NTC Sensor Temperature |
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High Precision And High Stability NTC Temperature Sensor Using Double-Layer Encapsulation Process
NTC temperature sensors are usually composed of 2 or 3 metal oxides, mixed in a fluid-like clay, and calcined into a dense sintered ceramic in a high-temperature furnace. Oxygen-bonded metals tend to donate free electrons. Ceramics are generally excellent insulators. But only theoretically, this is the case for thermistor-type ceramics when the temperature approaches absolute zero. However, as the temperature increases to more common ranges, thermal excitations eject more and more free electrons. As more electrons carry current through the ceramic, the effective resistance decreases. Resistance changes very sensitively with temperature. A typical change is a decrease of (-)7[%] to 3[%] per degree Celsius. This is the most sensitive of any sensor suitable for use over a wide temperature range.
The main technical parameters:
1. The rated zero-power resistance value R25 refers to the zero-power resistance value of the thermistor measured at 25°C.
2. B value; defined as the ratio of the difference of the natural logarithm of the zero-power resistance value at two temperatures to the difference between the two temperatures.
3. Thermal time constant; under zero power conditions, when the temperature changes suddenly, the time required for the temperature of the thermistor body to change by 63.2% of the temperature difference between the beginning and the end.
4. Dissipation coefficient; at a specified ambient temperature, the ratio of the change in power dissipation of the thermistor to its corresponding temperature change.
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Type
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NTC(thermistor) Temperature Sensor
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Temperature range
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-50℃ ~ +300℃；Customized
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Accurancy
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1%；5%；10%
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RT(25℃)
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1K；2K；2.2k；2.7k；3K；5K；7K；8K；12K；15K；20K；25K；30K；40K；47K；50K；60K；70K；100K；200K；230K；250K；470K；500K；1000K；Customized
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B value
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3274；3435；3470；3928；3950；3977；4100；4200；4400；Customized
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Probe Material
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Stainless steel SS304； aluminum；copper；plastic；epoxy；glass
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Installation
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Flanged；Surface；Threaded；Plastic；Straight；Film；Customized
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Wire Material
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Heat shrinkable tube；PVC tube；glass fiber tube； tube
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Connector
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Molex；JST；DuPont；CWB；CJT；U type；Customized
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Waterproof
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IP67；IP68
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Application
● Air conditioners, refrigerators, freezers, water heaters, water dispensers, heaters, dishwashers, disinfection cabinets, washing machines, dryers and other home appliances.
● Automobile air conditioner, water temperature sensor, intake air temperature sensor, engine
● Switching power supply, UPS uninterruptible power supply, frequency converter, electric boiler, etc.
● Intelligent toilet, electric blanket, etc.
Working principle of temperature sensor
Using the NTC thermistor under a certain measurement power, the resistance value drops rapidly as the temperature rises. Utilizing this feature, the NTC thermistor can be used to determine the corresponding temperature by measuring its resistance value, so as to achieve the purpose of detecting and controlling the temperature.
Conventional product electrical performance parameters
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Part No.
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R25℃
(KΩ)
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B(K)
25/50℃
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Rated Power @25℃(mW)
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Dissipation Factor(δ)
(mW/℃)
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Thermal time
Constant (S)
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TS502□3274A
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5.0
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3274
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10-20
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2-4
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5-20
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TS502□3435B
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5.0
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3435
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10-20
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2-4
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5-20
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TS502□3470A
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5.0
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3470
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10-20
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2-4
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5-20
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TS502□3950A
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5.0
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3950
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10-20
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2-4
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5-20
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TS103□3274A
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10.0
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3274
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10-20
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2-4
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5-20
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TS103□3435B
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10.0
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3435
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10-20
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2-4
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5-20
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TS103□3470A
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10.0
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3470
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10-20
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2-4
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5-20
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TS103□3950A
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10.0
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3950
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10-20
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2-4
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5-20
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TS103□4100A
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10.0
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4100
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10-20
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2-4
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5-20
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TS153□3950A
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15.0
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3950
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10-20
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2-4
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5-20
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TS153□4100A
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15.0
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4100
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10-20
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2-4
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5-20
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TS203□3950A
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20.0
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3950
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10-20
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2-4
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5-20
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TS203□4100A
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20.0
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4100
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10-20
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2-4
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5-20
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TS223□4200A
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22.0
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4200
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10-20
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2-4
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5-20
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TS403□3928A
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40.0
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3928
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10-20
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2-4
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5-20
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TS503□3950A
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50.0
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3950
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10-20
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2-4
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5-20
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TS503□4100A
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50.0
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4100
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10-20
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2-4
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5-20
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TS104□3950A
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100.0
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3950
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10-20
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2-4
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5-20
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TS104□4100A
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100.0
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4100
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10-20
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2-4
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5-20
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TS104□4400A
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100.0
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4400
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10-20
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2-4
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5-20
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Application
NTC temperature sensor not only outputs temperature signal, but also integrates humidity measurement, and the signal output is also changed from the original single signal to a variety of output forms, which can carry out long-distance communication, data can be recorded according to needs, upper limit alarm and automatic control, etc. function.
The intelligent integrated NTC temperature sensor used today adopts single-chip microcomputer technology, which is equipped with multiple analog-to-digital signal converters. Its measurement accuracy is higher, and the resolution is as high as 0.03 degrees. It can also integrate a calendar clock to realize multiple measurement modes. The output is more standardized and standardized, which can effectively suppress the interference of the surrounding environment on the temperature signal output, making the measurement value more accurate.
►Design considerations and procedure of temperature sensor:
1. Choose the shape acoording to customer's design or assemble requirements, and confirm the thermistor.
2. Confirm the thermistor element and other materials according to customers' requirement
3. Choose the suitable resistance,B value and tolerance
4. Choose suitable moisture-proof and insulation technology to meet customer's requirement
5. Choose suitable encapsulation structure to meet performance requirements of mechanical shock resistance
6. Meet customer's special requirements.
Features
Fast reponse time
Moisture proof, waterproof
Easily assemble
Customized available
Application
● Air conditioners, refrigerators, freezers, water heaters, water dispensers, heaters, dishwashers, disinfection cabinets, washing machines, dryers and other home appliances.
● Automobile air conditioner, water temperature sensor, intake air temperature sensor, engine
● Switching power supply, UPS uninterruptible power supply, frequency converter, electric boiler, etc.
● Intelligent toilet, electric blanket, etc.
| Type | NTC Temperature Sensor | |||
| Resisitance | 1K~5M Ω(1k 5k 4.7k 10k 20k 30k 50k 100k 150k 200k 300k)Customized | |||
| Beta Value | 3380k 3435k 3500k 3950k 4050k 4150k 4250k 4450k Customized | |||
| Housing | Cooper/Stainless/aluminum/Brass/Plastic/Nylon/Others Customized | |||
| Wire | 20/22/24/26/28/30/32AWG PP/PVC/PTFE/PFA/TPE/FEP Customized | |||
| Connector | JST/SYP/MOLEX/DUPONT/TE Customized | |||
| Installation | Flanged/Surface/Threaded/Plastic/Straight/Film/LUG/SMD/THT Customized | |||
| Accuracy | 0.1% 0.5% 1% 2% 3% 5% 10% Customized | |||
| Temperature range | -40~300 Customized | |||
| Wire Length | 10mm~10000mm Customized | |||
| Dongguan Linkun Electronic Technology Co., Ltd. | ||||||
| Main technical parameters of sensor series thermistor: | ||||||
| Model | Rated resistance value (R25) | B value | Operating temperature | Dissipation coefficient | Thermal time constant | |
| Resistance value (KΩ) | Allowable deviation (±%) | Nominal value (K) | (mW/℃) | (S) | ||
| CWF-102-3435 | 1 | ±1% ±2% ±3% ±5% | 3435 | -40℃ ～ ＋120℃ | ≥3.0 in still air | ≤6.0 in still air |
| CWF-202-3435 | 2 | 3435 | ||||
| CWF-2.252-3950 | 2.252 | 3950 | ||||
| CWF-472-3950 | 4.7 | 3950 | ||||
| CWF-502-3470 | 5 | 3470 | ||||
| CWF-502-3950 | 5 | 3950 | ||||
| CWF-682-3950 | 6.8 | 3950 | ||||
| CWF-103-3435 | 10 | 3435 | ||||
| CWF-103-3470 | 10 | 3470 | ||||
| CWF-103-3600 | 10 | 3600 | ||||
| CWF-103-3380 | 10 | 3380 | ||||
| CWF-103-3977 | 10 | 3977 | ||||
| CWF-103-4100 | 10 | 4100 | ||||
| CWF-153-3950 | 15 | 3950 | ||||
| CWF-203-3950 | 20 | 3950 | ||||
| CWF-233-3950 | 23 | 3950 | ||||
| CWF-303-3950 | 30 | 3950 | ||||
| CWF-333-3977 | 33 | 3977 | ||||
| CWF-403-3950 | 40 | 3950 | ||||
| CWF-473-4013 | 47 | 4013 | ||||
| CWF-503-3977 | 50 | 3977 | ||||
| CWF-503-3990 | 50 | 3990 | ||||
| CWF-503-4050 | 50 | 4050 | ||||
| CWF-104-3950 | 100 | 3950 | ||||
| CWF-104-3990 | 100 | 3990 | ||||
| CWF-104-4200 | 100 | 4200 | ||||
| CWF-204-3892 | 200 | 3892 | ||||
| CWF-204-3917 | 200 | 3917 | ||||
Working principle of temperature sensor
Using the NTC thermistor under a certain measurement power, the resistance value drops rapidly as the temperature rises. Utilizing this feature, the NTC thermistor can be used to determine the corresponding temperature by measuring its resistance value, so as to achieve the purpose of detecting and controlling the temperature.
Reliability Test
| Test Item | Test Standard | Test method | Performance requirements |
| Zero Power Resistance | IEC 60539-1 | Immerse samples in the constant temperature bath at 25℃±0.005℃,test steady resistance |
Resistance tol ±1%
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| B value | IEC60539-1 | Immerse samples in the constant temperature bath at 25℃,50℃(or 85℃), test steady resistance,and calculate B value |
Resistance tol ±1%
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| Free fall |
IEC60068-2-32
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Fall height: 1.5±0.1m,Surface: Cement , 1 time |
No obvious damage, R25 △R/R≤±1%
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| Insulation |
IEC60539-1
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500V pressure on insulation shell test insulation resistance |
>500MOhm
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| Withstand voltage | IEC60539-1 |
Withstand voltage: 1500V/AC ,Leakage current:2mA Lasting: 60sec
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No obvious damage
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| Tension | IEC60068-2-21 |
Pull uniform speed at the end, F>4.0KG(requested by customer)
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No obvious damage, R25 △R/R≤±1%
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| Vibration | Q/HBm 108-94 | Test frequency: 10~500Hz,swing: 1.2mm acceleration: 30m/s2 Direction X,Y,Z Time:8Hour/direction |
No obvious damage, R25 △R/R≤±1%
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| Steady humidity and heat | IEC60068-2-78 | Temp:40±2℃ Humidity:92-95%RH Time:1000±24Hour |
No obvious damage, R25 △R/R≤±1%
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| Thermal time constant | EC60539-1 | Immerse in 25℃ water,after thermal balance,immerse in 85℃,resistance arrives 63.2%,calculate total time |
<10 sec
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| High temperature storage | IEC60068-2-2 | Temp:125℃±5℃ Time: 1000±24Hour | No obvious damage, R25 △R/R≤±1% |
| Cold and thermal shock | IEC60068-2-14 |
-40℃~+125℃ T1:30min Cycle time:1000
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No obvious damage, R25 △R/R≤±1%
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| Knock experiment | IEC60068-2-77 |
Acceleration:250m/s2 Pulse lasting: 6ms Knock times: 1000 Recovery time: 2 Hour
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No obvious damage, R25 △R/R≤±1%
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| Low temperature storage | IEC60068-2-1 |
Temp: 40±2℃ Time: 1000±24Hour
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No obvious damage, R25 △R/R≤±1%
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| Salt spray | IEC60068-2-11 | Temp: 35±2℃ Collection hour : 1.0mL~2.0mL Time: determine per as actual demand |
No obvious damage, R25 △R/R≤±1%
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Contact Person: Ms. Huang
Tel: 13423305709
