NTC & Temperature Sensor Q&A
Q:What isNTC thermistor?What types are there?
A:The property where resistance decreases as temperature rises is called negative temperature characteristic, and a thermistor used to exhibit negative temperature characteristic is calledNTC thermistor (Negative Temperature Coefficient Thermal sensitivity resistor).
Common types include: single-end 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 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 (℃) (-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 index) of a temperature coefficient thermistor, and its unit is 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 formulation 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, which means that the larger the B value, the larger its resistance temperature coefficient.
The B value formula for NTC thermistor 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. In general, for products used for temperature measurement, temperature compensation, and surge suppression, a larger B value can be selected. This is because as temperature changes, products with a larger B value have a greater change in resistance value, which means that the larger the B value of an NTC thermistor, the more sensitive it is during use and the faster the response time.
Q:OrderWhat data is required when using NTC thermistors?
A:If there is already a determined resistance type, you need to inform the resistance value,The B value, accuracy, and the required resistance length are sufficient; if the type is uncertain, then the temperature, application scenario, resistance value, B value, accuracy, and required resistance length are needed.
Q:How fast is the response speed of NTC thermistors?
A:Response time is defined as reaching62% or the time required for a new temperature, and it is a function of mass. The smaller the sensor, the faster the response. The response speed of a discrete sensor is faster than that of 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 is your temperature sensor? What types are available?
A:Our company's temperature sensors mostly belong toNTC temperature sensors are available in various types depending on the application and structure, including straight tube type, threaded type, flange type, bullet-head type, epoxy resin encapsulated type, locking 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:Do you have temperature sensors in stock? Do you support customization?
A:Temperature sensors are specialized products, and different customers have different needs. Most in-stock products are epoxy resin sealed type, while other types are fewer.
Our products support customization. The thermistors to be used can be selected, and the customizable parts also include: the length, size, and shape of hardware parts, the model, specification, and length of wires, and the selection of different types of connectors.
Q:When it is unclear what type of temperature sensor is needed, can you recommend one?
A:Of course. Because there are many types of contact, when the customer is not clear, we will recommend products for the customer according to the customer's usage scenario and specific needs, so that the customer can obtain a satisfactory product. In addition, we can also promptly cooperate with the customer to adjust the product design according to the customer's requirements, and customize a satisfactory product that the customer needs.
Q:Does it involve products in the new energy field?
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 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 have a corresponding R-T table, and the data of different manufacturers itself differs. If you need the R-T table for a product, you can contact and consult our company's personnel.
Q: Can you help design products and draw drawings?
A: Yes, it is possible. The drawing of the product requires providing data on each component of the product, including material, dimensions, and other special requirements, and special authorization is also required.
