NTC & Temperature Sensor Q&A
Q:What isNTC thermistor?What types are there?
A:The property of resistance decreasing with increasing temperature is called negative temperature characteristic, and the thermistor used to represent negative temperature characteristics 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 wire type, clip-on small black head type, insulated film type, diode,Power typeand chip resistors.
Q:What are the technical parameters of NTC thermistors? Please give examples.
A:Main technical parameters include: nominal resistance (5K/10K/50K/100K...), resistance tolerance (accuracy)(1%/3%/5%/10%), temperature coefficient of resistance (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 index) of a temperature coefficient thermistor, with units of Kelvin temperature (K). Semiconductor ceramics are formed into NTC thermistor chips with a certain resistivity through a series of processing steps after high-temperature sintering. Each formula and sintering temperature has only one B value. The B value of an NTC thermistor is positively correlated with the temperature coefficient of resistance of the product, 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 and 6000K, and different B values can be selected according to different application ranges. Generally, for products used for temperature measurement, temperature compensation, and surge suppression, a larger B value can be selected. Because as the temperature changes, the resistance value of products with a larger B value 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 required when using NTC thermistors?
A:If the resistance type is already determined, you need to inform us of the resistance value,B value, accuracy, and the required resistance length are sufficient; if the type is uncertain, temperature, application scenario, resistance value, B value, accuracy, and the required resistance length are needed.
Q:How fast is the response speed of NTC thermistors?
A:Response time is defined as reachingThe time required for 62% or the new temperature is also 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 sensors is <15 seconds.
Q:What type of temperature sensor is your company's temperature sensor? What types are there?
A:Our company's temperature sensors are mostly ofNTC temperature sensors come in various types depending on the usage scenario and structure, including 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, we also offer PT100/PT1000 temperature sensors, DS18B20 temperature sensors, thermocouples, and infrared temperature sensors.
Q:Does your company's temperature sensor have stock? Does it support customization?
A:Temperature sensors are specific products, and customer needs vary. Most in-stock products are epoxy resin sealed types, and other types are less common.
Our products support customization. The thermistors that need to be used can be selected. In addition, customizable parts include: length, size, and shape of hardware 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 we deal with many types, when the customer is unclear, we will recommend products based on the customer's usage scenario and specific needs, so that the customer can get satisfactory products. In addition, we can also adjust product designs in a timely manner according to customer requirements and customize satisfactory products that customers need.
Q:Are there products related to new energy?
A:New energy has been a hot topic in recent years, and our products must include it. Not only new energy,We also have 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, products will correspond to an R-T table, and there are differences in data from different manufacturers. If you need the R-T table for a specific product, you can contact our staff for consultation.
Q: Can your company help design products and draw diagrams?
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.
