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Temperature sensor chip used in temperature detector
2022-07-07 16:44:00 【nanfeng775a】
Temperature is the most basic in the production process 、 One of the most important control parameters , It is related to the establishment of production conditions , The output of the product 、 quality 、 efficiency , And the life and safety of production equipment . Temperature is the performance parameter of the cold and hot degree of an object . The temperature measuring instrument is tested with the help of temperature sensing elements .
There are many kinds of temperature measuring instruments in the instrument market , How to choose an economical, practical and suitable temperature instrument ? When selecting temperature measuring instruments , Pay attention to the characteristics and scope of application of each instrument , This is the first key link to ensure the measurement accuracy of temperature detection instruments .
The installation of detection elements should ensure the correctness of measurement , Choose a representative installation location . For contact temperature measuring elements , The detection element should have enough insertion depth , The detection element should not be inserted into the dead corner of the medium , To ensure that the detection element and the measured medium can have sufficient heat exchange , When measuring the medium temperature in the pipeline , The working end of the detection element is located at the center of the pipeline where the flow rate is the maximum , The detection element should be installed in the direction of fluid movement , When necessary , Do not install downstream of the measured medium , Otherwise, it is easy to produce measurement error ; Measure the negative pressure pipe ( Or equipment ) Temperature of , It must be sealed , So as not to reduce the accuracy due to the absorption of external air .
The installation of detection elements should ensure safety 、 reliable . In order to avoid damage to the detection elements , The protective sleeve of the contact measuring instrument should have sufficient mechanical strength , It can be used according to the working pressure on site 、 temperature 、 Corrosivity and other characteristics , Reasonably choose the material of protective casing 、 Wall thickness . When the medium pressure exceeds 10MPa when , Protective jacket must be installed , To ensure safety ; To reduce the measured value , A filler with good heat transfer can be added inside the protective tube , Such as silicone oil 、 Quartz sand, etc ; The outlet hole of the junction box should face down , To avoid water vapor due to poor sealing 、 The dust enters and reduces the measurement accuracy .
Digital temperature sensor chip - MY18E20, The chip's temperature sensing principle is based on CMOS semiconductor PN Characteristic relationship between section temperature and band gap voltage , After small signal amplification 、 A / D conversion 、 After digital calibration compensation , Digital bus output , With high precision 、 Good consistency 、 Fast temperature measurement 、 Low power consumption 、 Programmable configuration is flexible 、 Long life and other advantages .
MY18E20 Built in nonvolatile E2PROM Storage unit , Can be used to save chips ID Number 、 High and low temperature alarm threshold 、 Temperature calibration correction value and user-defined information . Provide a variety of packaging styles of single bus interface 0.5℃ Digital temperature chip , To meet the needs of customers in different use scenarios , Such as surface paste type M601B DFN8 encapsulation (220.55mm)、M1601B SOT23-3 encapsulation (2.92.81.1mm)、MTS01B DFN8 encapsulation (2.52.50.75mm), Small in-line type MY1820 TO92S encapsulation 、M1820 TO92S Package, etc . Products are widely used in board level monitoring 、 ambient temperature 、 Smart appliances 、 Smart home 、 Consumer electronics and so on .
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