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 type, bead type small black head, bead type enameled wire, bead type small leather wire, snap-in small black head, insulated film type, diode,Power typeAs well as chip resistors.
Q:What are the technical parameters of an NTC thermistor? Please provide examples.
A:The 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 (°C) (-30°C-105°C/-30°C-125°C/-40°C-250°C…), material constant, time constant…
Q:What isWhat is the B value of an NTC thermistor?
A:The B value is the material constant (thermal sensitivity index) of the temperature coefficient thermistor, measured in Kelvin temperature (K). The semiconductor ceramic is formed into an NTC thermistor chip with a certain resistivity through high-temperature sintering and a series of processing steps. Each formula and sintering temperature has only one B value. The B value of an NTC thermistor is positively correlated with the product's resistance temperature coefficient, meaning that the larger the B value, the larger the resistance temperature coefficient.
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 and T2 respectively; T1, T2: absolute temperature scale.
The B value of NTC thermistors generally ranges from 2000K to 6000K, and different B values can be selected based on different application ranges. Generally, for products used for temperature measurement, temperature compensation, and surge suppression, a larger B value can be chosen. This is because, with changes in temperature, products with a larger B value have a greater change in resistance, meaning that the larger the B value of the NTC thermistor, the more sensitive it is during use, and the faster the response time.
Q:OrderWhat data is needed when using an NTC thermistor?
A:If a specific resistance type has been determined, the resistance value needs to be provided,B value, accuracy, and the required length of resistance; if the type is uncertain, temperature, usage scenario, resistance value, B value, accuracy, and the required length of resistance need to be used.
Q:How fast is the response speed of an NTC thermistor?
A:Response time is defined as reachingthe time required for 62% or the new temperature, and it is a function of quality. The smaller the sensor, the faster the response. The response speed of discrete sensors is faster than that of the same sensor packaged in a metal shell. The typical response time of the MF52 series NTC thermistor sensor 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 encapsulated type, lock washer 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 there are differences in customer needs. Most stock products are epoxy resin sealed types, while other types are less common.
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 not clear, can you recommend one?
A:Of course, because there are many types of contacts, when the customer is not clear, we will recommend based on the customer's usage scenario and specific needs so that the customer can obtain satisfactory products. Additionally, we can also promptly cooperate with the customer to adjust the product design according to their requirements to customize satisfactory products.
Q:Does it involve new energy products?
A:New energy has been a hot topic in recent years, and it must be included in our products. Not only new energy,We also cover products used in 3D printing and other fields, which are quite extensive.
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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, please contact our company personnel for consultation.
Q: Can your company help design products and draw drawings?
A: Yes, it is possible. The product drawings need to provide data for each component of the product, including materials, dimensions, and other special requirements, and special authorization is also required.
