NTC & Temperature Sensor Q&A
Q:What isNTC thermistors?What types are there?
A:The property of resistance decreasing as temperature increases 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 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 an NTC thermistor? Please provide examples.
A: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 sensitivity index) of the temperature coefficient thermistor, measured in Kelvin (K). Semiconductor ceramics are formed into NTC thermistor chips with a certain resistivity through a series of processing steps after high-temperature sintering, and 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 that the larger the B value, the larger the resistance temperature coefficient.
The formula for the B value of an NTC thermistor is: B=T1T2Ln(RT1/RT2)/(T2-T1), where B is the B value of the NTC thermistor, provided by the manufacturer; RT1 and RT2 are the resistance values of the thermistor at temperatures T1 and T2 respectively; T1 and T2 are absolute temperatures.
The B value of NTC thermistors is generally between 2000K-6000K, and different B values can be selected according to different application ranges. Generally, products used for temperature measurement, temperature compensation, and surge suppression can use larger B values. Because as the temperature changes, the resistance value of products with larger B values 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 an NTC thermistor?
A:If a specific resistance type has been determined, the resistance value needs to be provided,B value, accuracy, and the required length of resistance; if the type is uncertain, temperature, usage scenario, resistance value, B value, accuracy, and the required length of resistance need to be used.
Q:How fast is the response speed of an NTC thermistor?
A:Response time is defined as reaching62% or the time required for the 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 casing. The typical response time of MF52 series NTC thermistor sensors is <15 seconds.
Q:What type of temperature sensors do you offer? What are the available types?
A:Most of our temperature sensors areNTC 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, lock washer terminal type, ABS plastic housing type, and 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? Can they be customized?
A:Temperature sensors are specific products, and there are differences in customer needs. Most stock products are epoxy resin sealed types, while other types are less common.
Our products support customization. The thermistors you need can be selected from our options. Additionally, customizable parts include: length and shape of metal components, model, specifications, and length of wires, as well as 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 there are many types of contacts, when the customer is not clear, we will recommend based on the customer's usage scenario and specific needs so that the customer can obtain satisfactory products. Additionally, we can also cooperate with the customer to make timely design adjustments to meet their needs.
Q:Are there any 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, the product will have a corresponding R-T table, and data from different manufacturers inherently differs. If you need an R-T table for a specific product, please contact us for consultation.
Q: Can you help design products and draw schematics?
A: Yes, we can. Schematic drawings require data for each component of the product, including material, dimensions, and other special requirements, as well as special authorization.
