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, bead-type small black head, bead-type enameled wire, bead-type small leather wire, snap-point small black head, insulated film type, diode,Power Typeand chip resistors.
Q:What are the technical parameters of NTC thermistors? Please give an example.
A:Key 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 exponent) of a temperature coefficient thermistor, with units of Kelvin temperature (K). After high-temperature sintering, semiconductor ceramics undergo a series of processing 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 product's resistance temperature coefficient, meaning the larger the B value, the larger its resistance temperature coefficient.
The B value formula for NTC thermistors 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-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 is required for NTC thermistors?
A:If there is an already determined resistance type, you need to inform us of the resistance value,B value, accuracy, and the required length of the resistor; if the type is uncertain, then temperature, application scenario, resistance value, B value, accuracy, and the required length of the resistor are needed.
Q:How fast is the response time of NTC thermistors?
A:Response time is defined as reaching62% or the time required for a 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 for MF52 series NTC thermistor sensors is <15 seconds.
Q:What type of temperature sensors does your company offer? What are the available types?
A:Our company's temperature sensors are mostlyNTC 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, lock washer terminal type, ABS plastic shell type, and thin film type. In addition, our company also has PT100/PT1000 temperature sensors, DS18B20 temperature sensors, thermocouples, and infrared temperature sensors.
Q:Do you have 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 other types being less common.
Our products support customization. The thermistors you need can be selected from our available options. Additionally, customizable parts include: hardware dimensions and shapes, wire model specifications and lengths, and the selection of different connector types.
Q:If the type of temperature sensor needed is unclear, can you make a recommendation?
A:Of course. Because there are many types of contacts, when the customer is unclear, we will recommend products based on the customer's usage scenarios and specific needs, so that customers can obtain satisfactory products. In addition, we can also cooperate with customers to adjust product designs in a timely manner according to their requirements, and customize satisfactory products that customers need.
Q:Are there products related to new energy?
A:New energy is a hot topic in recent years, and it is essential for our products. Not only new energy, butWe also have products for 3D printing and other fields, which are quite extensive.
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Q: How can I obtain the R-T tables for NTC thermistors and temperature sensors?
A: Yes, products will correspond to R-T tables, and data from different manufacturers inherently differs. If you need an R-T table for a specific product, please 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, including material, dimensions, and other special requirements, as well as special authorization.
