OEM Length DS18B20 10K 1% B3950 Waterproof Digital Temperature Sensor Probe
Description of Thread Housing NTC Temperature Sensor
Temperature sensor is made with high precision, reliable NTC thermistor connected to high quality PVC cable, which is wrapped with insulated, heat conductive and water resistant materials into desired shapes, so as to facilitate long-distance temperature measurement and control and installation.
Details of Thread Probe NTC Temperature Sensor
WATER-PROOF
Waterproof Stainless steel sheath
NO EXTERNAL COMPONENTS
Unique 1-wire interface requires only one port pin for communication.
UNIQL JE STORAGE METHOD
Each device has a unique 64 bit serial code stored in an onboard ROM.
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% |