NTC & Temperature Sensor Q&A
Q:What isNTC thermistors?What types are there?
A:The property of resistance decreasing with increasing temperature is called negative temperature characteristic, and the thermistor that represents this characteristic is calledNTC thermistor (Negative Temperature Coefficient Thermal sensitivity resistor).
Common types include: single-ended glass sealed type, bead small black head type, bead enameled wire type, bead small leather wire type, snap-in small black head type, insulated film type, diode,Power typeand chip resistors.
Q:What are the technical parameters of an NTC thermistor? Please give examples.
A:Main technical parameters include: nominal resistance (5K/10K/50K/100K…), resistance tolerance (accuracy)(1%/3%/5%/10%), resistance temperature coefficient (B value) (3270/3380/3435/3470/3950/4000/4050/4500…), operating temperature range (℃) (-30℃-105℃/-30℃-125℃/-40℃-250℃...), material constants, time constants...
Q:What isB value of NTC thermistor?
A:The B value is the material constant (thermal index) of a thermistor. The unit is Kelvin (K). After high-temperature sintering, the semiconductor ceramic undergoes a series of processing steps to form an NTC thermistor chip with a certain resistivity. Each formula and sintering temperature has only one B value. The B value of an NTC thermistor is positively correlated with the product's temperature coefficient of resistance, meaning that the larger the B value, the larger its temperature coefficient of resistance.
The B value formula for NTC thermistors is: B = T1T2Ln(RT1/RT2)/(T2-T1), where B: the B value of the NTC thermistor, provided by the manufacturer; RT1, RT2: the resistance values of the thermistor at temperatures T1 and T2, respectively; T1, T2: absolute temperature scale.
The B value of NTC thermistors is generally between 2000K-6000K, and different B values can be selected according to different application ranges. Generally, products used for temperature measurement, temperature compensation, and surge suppression can use larger B values. Because as the temperature changes, the resistance value of products with larger B values changes more, meaning the larger the B value of the NTC thermistor, the more sensitive it is in use and the faster the response time.
Q:OrderWhat data needs to be provided when ordering an NTC thermistor?
A:If the resistance type is already determined, you need to provide the resistance value,B value, accuracy, and the required length of the resistor; if the type is uncertain, you need to provide the temperature, usage scenario, resistance value, B value, accuracy, and the required length of the resistor.
Q:How fast is the response of an NTC thermistor?
A:Response time is defined as reaching62% or the time required for the new temperature, and is a function of quality. The smaller the sensor, the faster the response. Discrete sensors respond faster than the same sensor packaged in a metal casing. The typical response time of MF52 series NTC thermistor sensors is <15 seconds.
Q:What type of temperature sensor does your company offer? What types are available?
A:Our company's temperature sensors mostly belong toNTC type temperature sensors, depending on the usage scenario and structure, are available in straight tube type, threaded type, flange type, bullet type, epoxy resin encapsulated type, locking tab terminal type, ABS plastic shell type, and film type. Additionally, our company also offers PT100/PT1000 temperature sensors, DS18B20 temperature sensors, thermocouples, and infrared temperature sensors.
Q:Does your company have temperature sensors in stock? Do you support customization?
A:Temperature sensors are specific products, and customer needs vary. Most in-stock products are epoxy resin sealed types, with fewer other types.
Our products support customization, and the thermistors available for selection can be provided. Additionally, customizable parts include: the length, size, and shape of hardware components, specifications and lengths of wires, as well as the selection of different types of connectors.
Q:If the type of temperature sensor to be used is unclear, can you recommend one?
A:Of course. Because we deal with many types, when customers are unclear, we will recommend products based on their usage scenarios and specific needs, so that customers can get satisfactory products. In addition, we can also cooperate with customers to adjust product designs in a timely manner according to their requirements, and customize satisfactory products that customers need.
Q:Does it involve products related to new energy?
A:New energy is a hot topic in recent years, and our products must include it. Not only new energy, butWe are also involved in products used in 3D printing and other fields, and our scope is quite broad.
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Q: How to obtain the R-T table for NTC thermistors and temperature sensors?
A: Yes, the product will correspond to an R-T table, and the data from different manufacturers may vary. If you need the R-T table for the product, you can contact our staff for consultation.
Q: Can your company help design products and create drawings?
A: Yes, it is possible. Product drawings require data for each component of the product, including material, dimensions, and other special requirements, and also require special authorization.
