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 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: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 constants, time constants…
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 a series of processing steps after high-temperature sintering, and there is only one B value for each formula and sintering temperature. 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: 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 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, then temperature, usage scenario, resistance value, B value, accuracy, and the required length of resistance are needed.
Q:How fast is the response speed of an NTC thermistor?
A:The 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 housing. 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 there are differences in customer needs. Most stock products are epoxy resin sealed types, while other types are less common.
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, the model 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 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 scenarios 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 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 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, the product will correspond to an R-T table, and there are differences in data from different manufacturers. If you need an R-T table specific to the product, you can contact our staff for consultation.
Can your company assist in designing products and drawing schematics?
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.
