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Product Details:
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| Features: | Resistance,B-value Can Be Customized | Resistance Value: | 1K, 5K, 10K, 50K, 100K, 15K |
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| Usage: | Temperature Sensor | Operating Temperature: | -40~+200degC |
| Customized: | Available | Resistance Tolerance: | F±1%,G:±2%, H:±3%,J:±5%,K:±10% |
| Highlight: | Waterproof NTC Heat Sensor,Stable NTC Heat Sensor,Practical NTC Electronic Component |
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Waterproof NTC temperature sensor 10K B3977 accuracy 1% sealed thermistor probe
The accuracy of the temperature sensor should reach ±2%~±5%RH. If it cannot reach this level, it is difficult to use it as a measuring instrument. It is difficult for the temperature sensor to achieve the accuracy of ±2%~±3%RH. The given properties are measured at room temperature (20°C ± 10°C) and in clean gas. In actual use, due to the influence of dust, oil and harmful gases, aging will occur and the accuracy will decrease after a long time of use. The accuracy level of the temperature sensor should be judged in combination with its long-term stability. Generally speaking, long-term stability and use The lifespan is the first issue affecting the quality of the temperature sensor. There are very few products whose annual drift is controlled at 1%RH level, generally around ±2%, or even higher.
►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:
● High sensitivity and fast response
● Resistance value and B value have high precision, good consistency and interchangeability
● Using double-layer encapsulation technology, it has good insulation sealing and resistance to mechanical collision and bending resistance
● The structure is simple and flexible, and can be customized according to different design requirements of customers.
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.
Product Description
| 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
