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 the 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 NTC thermistors? Please give an example.
A:Key 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 (℃) (-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 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 selected. Because as the temperature changes, products with a larger B value have a greater change in resistance value, 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 required for NTC thermistors?
A:If there is an already determined resistance type, you need to inform us of the resistance value,The B value, accuracy, and the length of the required resistance are sufficient; if the type is uncertain, then the temperature, usage scenario, resistance value, B value, accuracy, and the length of the required resistance need to be provided.
Q:How fast is the response time of NTC thermistors?
A:Response time is defined as reachingThe time required for 62% or new temperature 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 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:Does your company 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:When 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 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:Does it involve products related to new energy?
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 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 tables for NTC thermistors and temperature sensors?
A: Yes, the product will correspond to an R-T table, and there are differences in the data from different manufacturers. If you need the R-T table for the product, you can contact our staff for consultation.
Q: Can your company help design products and draw diagrams?
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.
