NTC & Temperature Sensor Q&A
Q:What isNTC thermistor?What types are there?
A:The property where resistance decreases as temperature increases is called negative temperature characteristic, and a thermistor used to represent the negative temperature 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 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: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 index) of a temperature coefficient thermistor, with units of Kelvin temperature (K). After high-temperature sintering, semiconductor ceramics are processed through a series of steps to form NTC thermistor chips 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 temperature coefficient of resistance of the product, meaning that the larger the B value, the larger its temperature coefficient of resistance.
The formula for the B value of an NTC thermistor is: B=T1T2Ln(RT1/RT2)/(T2-T1), where B: B value of the 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 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 higher the B value of the NTC thermistor, the more sensitive and faster the response time when used.
Q:OrderWhat data needs to be provided for an NTC thermistor?
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 time of an NTC thermistor?
A:Response time is defined as reaching62% or the time required for a new temperature, and is a function of mass. 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 for MF52 series NTC thermistor sensors is <15 seconds.
Q:What type of temperature sensor does your company's temperature sensor belong to? What types are there?
A:Our company's temperature sensors are mostly ofNTC type temperature sensors, depending on the application scenario and structure, are available in straight tube type, threaded type, flange type, bullet type, epoxy encapsulated type, lug terminal type, ABS plastic housing type, and thin film type. In addition, we also offer 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. Our stock products are mostly epoxy resin sealed types, with fewer other types.
Our products support customization. The thermistors to be used are available for selection. Other customizable parts include: length, size, and shape of hardware components, 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 make a recommendation?
A:Of course, because we have encountered 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 the product design in time according to the customer's requirements and customize the satisfactory products that the customer needs.
Q:Are there 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, products will have corresponding R-T tables, and data from different manufacturers inherently differs. If you need an R-T table for a specific product, please contact our sales personnel 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.
