NTC & Temperature Sensor Q&A
Q:What isNTC thermistors?What types are there?
A:The property that resistance decreases as temperature rises is called negative temperature characteristic, and the thermistor used to represent negative temperature characteristic is calledNTC thermistor (Negative Temperature Coefficient Thermal sensitivity resistor).
Common types include: single-ended glass sealed, bead small black head, bead enameled wire, bead small leather wire, snap-fit small black head, insulated film type, diode,Power typeand chip resistors.
Q:What are the technical parameters of an NTC thermistor? Please provide 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 constant, time constant...
Q:What isWhat is the B value of an NTC thermistor?
A:The B value is the material constant (thermal index) of a temperature coefficient thermistor, expressed in Kelvin (K). After high-temperature sintering, semiconductor ceramics undergo 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: B value of NTC thermistor, provided by the manufacturer; RT1, RT2: resistance values of the thermistor at temperatures T1, 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. In general, 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, which means 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 is required 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 time 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 sensors does your company's temperature sensor belong to? What types are there?
A:Most of our company's temperature sensors areNTC type temperature sensors, according to different usage scenarios and structures, are available in straight tube type, threaded type, flange type, bullet type, epoxy resin encapsulation type, lock piece terminal type, ABS plastic shell type, and film type. In addition, our company also has PT100/PT1000 temperature sensors, DS18B20 temperature sensors, thermocouples, and infrared temperature sensors.
Q:Do you have your company's temperature sensors in stock? Do you support customization?
A:Temperature sensors are specific products, and customer needs vary. Stock products are mostly epoxy resin sealed types, with fewer other types.
Our products support customization. The thermistors you need to use are available for selection. Other customizable parts include: length, size, and shape of metal parts, model, specification, and length of wires, and selection of different types of connectors.
Q:If the type of temperature sensor to be used is unclear, can you recommend one?
A:Certainly. 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. Additionally, we can also cooperate with customers to adjust product designs in a timely manner according to their requirements to customize satisfactory products.
Q:Does it involve products in the new energy field?
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 can I obtain the R-T table for NTC thermistors and temperature sensors?
A: Yes, there will be an R-T table corresponding to the product, and the data from different manufacturers itself is different. If you need an R-T table for the product, you can contact our company's personnel for consultation.
Q: Can your company help design products and draw drawings?
A: Yes, it is possible. Product drawings require data for each component, including material, dimensions, and other special requirements, and also require special authorization.
