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Address: Baisha Sancun Industrial Zone, Humen Town, Dongguan City, Guangdong Province, China
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IP67 IP68 Waterproof Temperature Sensor High Sensitivity Fast
Response
NTC thermistor, probe assembly (combination) piece. A finished
thermistor assembly (combination) piece that uses a thermistor
shell, an extension lead, and sometimes a connector.
structure
Generally, it is composed of NTC thermistor, probe (metal shell or plastic shell, etc.), extension lead, and metal terminal or connector.
principle
Using 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.
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.
Features
1. Wide operating temperature range, good stability and
reliability.
2. Easy to installation and manipulation as the sealing can be done
according to environment and conditions there it is applied by
customer.
3. Accurate testing can reflect temperature change precisely.
4. Insulating resistance(MΩ): over 100MΩ at DC500 V
5. Working temperature range(°C): -50 to +150
6. Dissipation factor(mw/°C): 1-2 (in still air)
7. Thermal time constant(s): within 10-20 sec (in air)
Temperature sensor used for temperature measurement, sensing and
control in:
• Water boilers
• Heating systems
• Chiller systems
• Water and used water systems
• Water and oil tanks
• Consumer appliances , Coffee machines
• Industrial appliances
• Solar heating systems
Type | NTC(thermistor) Temperature Sensor |
Temperature range | -50℃ ~ +300℃；Customized |
Accurancy | 1%；5%；10% |
RT(25℃) | 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 |
B value | 3274；3435；3470；3928；3950；3977；4100；4200；4400；Customized |
Probe Material | Stainless steel SS304； aluminum；copper；plastic；epoxy；glass |
Installation | Flanged；Surface；Threaded；Plastic；Straight；Film；Customized |
Wire Material | Heat shrinkable tube；PVC tube；glass fiber tube； teflon tube |
Connector | Molex；JST；DuPont；CWB；CJT；U type；Customized |
Waterproof | IP67；IP68 |
Operating temperature and environment of NTC temperature sensor depend on specific performance of its core element and lead wire:
►Different NTC thermistor using in the NTC temperature sensors with the following different operating temperature:
Chip or MF52A,MF51E,MF55: temperature resist grade 125℃,actual
temperature resist grade 150℃
MF58: temperature resist grade 200℃,actual temperature resist grade
250℃
MF51: temperature resist grade 200℃,actual temperature resist grade
250℃
Special MF51: temperature resist grade 250℃,actual temperature
resist grade 300℃
Weldless chip:temperature resist grade 450℃,actual temperature
resist grade 500℃
►Operating environment
In the environment of high temperature,high humidty and high corrosion,we suggest to use glass sealed type thermistor as the core element.And MF51 type will be the best NTC thermistor in high humidity environment.
►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.
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% |
| 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% |
| Free fall | IEC60068-2-32 | Fall height: 1.5±0.1m,Surface: Cement , 1 time | No obvious damage, R25 △R/R≤±1% |
| Insulation | IEC60539-1 | 500V pressure on insulation shell test insulation resistance | >500MOhm |
| Withstand voltage | IEC60539-1 | Withstand voltage: 1500V/AC ,Leakage current:2mA Lasting: 60sec | No obvious damage |
| Tension | IEC60068-2-21 | Pull uniform speed at the end, F>4.0KG(requested by customer) | No obvious damage, R25 △R/R≤±1% |
| 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% |
| Steady humidity and heat | IEC60068-2-78 | Temp:40±2℃ Humidity:92-95%RH Time:1000±24Hour | No obvious damage, R25 △R/R≤±1% |
| Thermal time constant | EC60539-1 | Immerse in 25℃ water,after thermal balance,immerse in 85℃,resistance arrives 63.2%,calculate total time | <10 sec |
| 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 | No obvious damage, R25 △R/R≤±1% |
| Knock experiment | IEC60068-2-77 | Acceleration:250m/s2 Pulse lasting: 6ms Knock times: 1000 Recovery
time: 2 Hour | No obvious damage, R25 △R/R≤±1% |
| Low temperature storage | IEC60068-2-1 | Temp: 40±2℃ Time: 1000±24Hour | No obvious damage, R25 △R/R≤±1% |
| 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% |
