CWF系列风华NTC热敏电阻温度传感器规格书
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传感器SENSORSSENSOR MANUALTEMPERATUREMEASUREMENTCONTROLSHANGHAI BENMU INDUSTRY CO., LTD.上海本牧实业有限公司QUICK LINKSCONNECTINGSENSOR TECH电阻值耗散常数ResistanceThermal dissipation constantB值热时间常数B constantThermal time constant热敏电阻的电阻值R和绝对温度T之间,有以下近似关系。
Between resistance R and absolute temperature T, there is the following approximate relationship.11T1T2根据公式、可以求证任意温度T时的热敏电阻R。
Thermistor resistance R at any temperature T can be calculated from equation (1)R1: Resistance (Ω) at absolute temperature T1 (K)绝对温度T1 (K) 时的电阻值R2: Resistance (Ω) at absolute temperature T2 (K)绝对温度T2 (K) 时的电阻值A thermistor is "a thermally sensitive resistor"that is a semiconductor whose resistance varies significantly with temperature.In general,there are two types thermal senstive resistor.One is PTC (Postive Temperature Coefficient);the resistance increases as temperature increases.The other is NTC (Negative Temperature Coefficient);the resistance decreases as temperature increases.The following description is applicable only to NTC thermistors.热敏电阻是应用于信息系统与控制系统的敏感元件,主要用于对温度的测量、控制、保护及用作加热器。
NTC热敏电阻的主要技术参数说明NTC热敏电阻(Negative Temperature Coefficient Thermistor)是一种温度敏感元件,其电阻值随温度的变化而变化。
它在温度测量、温度补偿、温度控制等领域中得到广泛应用。
下面是NTC热敏电阻的主要技术参数说明:1. 电阻值(Resistance Value):NTC热敏电阻的电阻值在不同温度下会有不同的取值,通常以欧姆(Ω)为单位表示。
常见的电阻值有1Ω、10Ω、100Ω等。
2. 温度系数(Temperature Coefficient):温度系数是指NTC热敏电阻的电阻值随温度变化的速率。
一般使用ppm/℃(每百万分之一度每摄氏度)来表示。
温度系数越大,说明NTC热敏电阻对温度的敏感性越高。
3. 工作温度范围(Operating Temperature Range):NTC热敏电阻能够正常工作的温度范围。
一般来说,工作温度范围为-40℃至+125℃。
4. 额定功率(Rated Power):NTC热敏电阻能够长时间连续工作的功率。
额定功率以瓦特(W)为单位表示。
通常的额定功率有0.1W、0.25W、0.5W等。
5. 热时间常数(Thermal Time Constant):热时间常数是NTC热敏电阻从一个温度到另一个温度所需的时间。
热时间常数可以用来描述NTC热敏电阻的响应速度和惯性。
热时间常数越小,NTC热敏电阻的响应速度越快。
6. 稳定偏差(Stability Tolerance):稳定偏差是指NTC热敏电阻在标准温度下的电阻值与额定值之间的差异。
通常以百分比(%)来表示。
稳定偏差越小,说明NTC热敏电阻的稳定性越好。
7. 破坏温度(Maximum Operating Temperature):NTC热敏电阻能够承受的最高温度。
超过破坏温度,NTC热敏电阻可能会发生损坏。
8. 尺寸(Size):NTC热敏电阻的尺寸对于具体应用场景和安装要求非常重要。
APPLICATIONSTemperature test in all kinds of air-condition,refrigerator,water boiler,microwave oven.PART NUMBERINGFEATURESHigh precision and high stability Quick temperature response Resistant to heat shock Moisture resistantExcellent quality and high stabilityGuang Dong Fenghua Advanced Technology (Holding)Co.,LTD.codeNTCNTC temperature sensors code25Rated zero-power resistance R unit:The first two are significant figure of resistance and the third one expresses number of following zeros25FH -CWFXXXX XXXXXX /XXXXX%Tolerance of R %25B B value CodeB%Tolerance of B value %BB value Temperature CodeLength of the sensor unit:mmTermination shape codeNTCNTC THERMISTOR TEMPERATURE SENSORSAPPEARACE AND DIMENSIONSCPour typetype CSHELL PARAMETERE EPOXY TYPE TYPE ENOTE We can absolutely design NTC Sensors as your requirement.shellPVCR 1010Rated zero-power resistanceR 10100.5%1%2%3%5%Resistance tolerance 0.5%1%2%3%5%.B 25/5025/8525005000KB Constant 25/50or 25/852*******K.B0.5%1%2%3%5%.Tolerance of B-constant0.5%1%2%3%5%.40100Operating temperature40100C2.04.0mw/E3.04.5mw/.Dissipation factor (in still air)type C 2.0 4.0mw/type E3.04.5mw/.C30s E 20s.Thermal time constant (in still air)type C30s type E 20s.R TR T characteristics25252626PERFORMANCE PARAMETERNTCNTC THERMISTOR TEMPERATURE SENSORSR T characteristicsNOTE We can absolutely design NTC sensors as your requirement.1.R 251.Rated zero-power resistance (R )The zero-power resistance at 25(298.15K).2.BB=ln(R /R )/(1/T1-1/T2)R T1RT22525T1T2T1T2THE MAIN CHARACTERISTICS2.B valueB value is expressed by the following equation:B=ln(R /R )/(1/T1-1/T2)R Resistance at T1(K).R Resistance at T2(K).363.2%C=C/3.Thermal time constantThe time necessary for a thermistor to vary its temperature by 63.2%of the total difference its initial temperature and its final temperature when it is subjected to a temperature step under zero-power conditions.4=P/T4.Dissipation factorThe quotient of the change in power dissipation in a thermistor and the Resultant temperature change of the element.T1T2T1T25.=1/R dR /dT =-B/TT R TT KBB(K)5.Temperature coefficient at zero-power of the resistance At a specific temperature Tis a ratio of the zero-power resistance change with temperatureand the zero-power resistance.=1/R dR /dT =-B/T TTT T TT TTTT T 22NTCNTC THERMISTOR TEMPERATURE SENSORSRELIABILITY CHARACTERISTICSFH-CWF502F3470FA/B(25/50)3470K1%R255K1%NTCNTC THERMISTOR TEMPERATURE SENSORSATTENTIONS OF ORDERPlease comment the next if you want to make some order:1APPLICATIONSuch as temperature survey,control,compensating and so on.2SERVICE ENVIROMENTSuch as atmosphere,water,moisture and so on.3THE WORKING RANGE OF TEMPERATURE()()4ITEM NAME FORM AND SIZE5THE RESISTANCE VALUEK%at()6B THE VALUE OF BB(/)=()K%7THERMAL TIME CONSTANT()()()S()S()enviroment8DISSIPATON FACTORmW/9OTHER SPECIAL TECHNICAL CONDITIONSAttentions:If the service request you want is out of the list parameter,please contact with us,and we will design and manufact as your requirement.。
CWFCWF Precision NTC Thermistor Probes for Temperature MeasurementThe CWF series NTC Thermistors are supplied in 5 basic styles of enclosures designed to facilitate installation in a wide variety of applications. PVC leads are applied to a precision, high-reliability NTC thermistor, insulated with heat conductive water resistant materials and potted into any of a wide variety of probe bodies.CWF thermistors are also available with custom housings or custom lead lengths for remote sensing and temperature control in difficult conditions.Also see the Cantherm Thermistor Probe Brochure for additional models.CWFCWF1 (Ethoxyline dipped)Characteristics: Moisture resistant, good insulation, high reliability, small time constant, quick responses.Available Wire Types: AWG 24#, 26#, 28#,30#, PVCApplications: Household air-conditioning, refrigeration and many others.CWF2 (Packaged in aluminum, copper, or stainless steel probe body)Characteristics: High resistance to thermal shock, moisture resistant, strong and secure structure, high dissipation coefficient, the test current can be higher than that of the ethoxyline resin-package.Standard Wire Type: AWG 24#, 26#, 28#,30#, PVCApplications: Refrigeration, air-conditioning, water heaters, drinking fountains, and more.CWF3 (Plastic body)Characteristics: Good dimensional tolerances, good heat resistance and moisture protection, high voltage resistance.Available Wire Types: AWG 24#, 26#, 28#,30#, PVCApplications:Air-conditioning, refrigeration, and more.ABApplications• Heating, ventilation & air conditioning• Temperature regulation and measurement • Automotive electronics • Water heaters• Household appliances such as refrigerators, water coolers, dishwashers and many othersCharacteristics• Wide variety of installation fixtures and probes are available to suit your needs.• Small size and fast response (temperature coefficient of resistance can reach- (2~5%/°C)• Long-term stability and reliability (yearly drift of ≤1%)• Excellent tolerance and interchangeability (the accuracy of R and B value can be ±1%)• Double layer packaging provides excellent insulation and high strength and impact resistance.• Dissipation constant type 1 package ≥2.0mW/°C, type 2 package ≥4.0mW/°C • Time constant of ≤15S to 70SCWF4 (Sheet metal attachment fixtures)Characteristics: Wide variety of fixtures, suitable for most applications.Applications:Fan control, industrial temperature controllers, and more.CWF5 (Custom probes)Characteristics: Small time constant, fast response, flexible and secure.Applications: Water heaters, electronic thermometers, and more.* Also refer to the Cantherm Custom NTC Thermistor Probe Brochure .4A4B4D4C8415 Mountain Sights Avenue • Montreal (Quebec), H4P 2B8, CanadaTel: (514) 739-3274 • 1-800-561-7207 • Fax: (514) 739-2902 • E-mail: sales@NTC Temp sensor Package Option1- Dipped ethoxyline resin (ex. 1S1)2- Aluminum,copper, or stainless steel housing (ex. 2S1) 3- Plastic body (ex. 3AS1)4- Sheet metal attachment fixtures (ex. 4B) 5- Special probes (ex. 5B)The Rated Resistance at 25ºCExample:103 10×103 10000 =10K The Precision Symbol of Rated Resistance F ±1 G ±2 H ±3 J ±5 B value 25/50B value example: 3380KCWF – 103 J 3380分销商库存信息:CANTHERMCWF1B104H3950CWF1B103H3380CWF1B103G3380 CWF1B104F3950CWF1B103F3380CWF4B103G3380 CWF3AA503G3950CWF3AA103G3380CWF1B104J3950 CWF1B104G3950CWF1B103J3380CWF3AA153F3470 CWF3AA202F3470CWF3AA222F3470CWF3AA223F3470 CWF3AA224F4150CWF3AA272F3100CWF3AA332F3470 CWF3AA333F3470CWF3AA472F3470CWF3AA473F3950 CWF3AA474F4300CWF3AA683F3950CWF4B153F3470 CWF4B202F3470CWF4B222F3470CWF4B223F3470 CWF4B224F4150CWF4B272F3100CWF4B332F3470 CWF4B333F3470CWF4B472F3470CWF4B473F3950 CWF4B474F4300CWF4B503F3950CWF4B683F3950 CWF1A103F3380CWF1A104F4150CWF1A503F3950 CWF4B104G4150CWF3AA104G4150。
广州维智电子科技有限公司
N T C 热 敏 电 阻 规 格 书
型号:AT-103F3470F
1.概要
本规格书详细说明了AT 型NTC 热敏电阻的有关性能、结构尺寸和主要试验条件。
2.热敏电阻特性
项目 代号 特性值 单位 精度 2.1 阻值 R25℃ 10 K Ω ±1% 2.2 B 值 B25/85 3470 K ±1% 2.3 时间常数 τ 10 Sec Max 2.4 耗散系数
δ
mW/℃
Min
3.工作条件
:-40~100℃ 3.2最大电流:1.0mA 3.3最大功率:5mW
NO. 材质、规格
1. 热敏电阻芯片
2.
环氧树脂
3. Φ
5.电阻对应温度分度表见附页
6.1 温度循环 -30℃X5min →25℃X5min
25℃X5min ← +100℃X5min 500cycles ΔR/R ≤2%
6.2 高温储藏 placed for 1000hours,at 100℃ ΔR/R ≤2%
6.3 低温储藏
placed for 1000hours,at -30℃
ΔR/R ≤2%
6.4 高温高湿
40℃-95%R.H,placed for 1000 hours ΔR/R ≤2%
6.5 漂移试验
ΔR/R ≤2%
若加热缩套管时,注意电阻包封头所受温
度应≤250℃,焊枪出风口应保持适当距 离,避免高温对电阻本体的过度热冲击,导 致阻值漂移. 文件编号 版本更改 日期 编制 审批
WZBF07 A。
页次 1-11实业有限公司版次 1.0产品规格书日期 2013.目 录名 称 页 次目录 (1)产品图纸 (2)产品性能 (3)R-T表 (4)变更记录版次 变更日期 变更内容第1页 共11页24mm*0.31铜带热敏电阻备 注比 例重 量第 2 页图 样 标 记共 11 页名 称材 料 及 规 格温度传感器日期更改文件号签字数量实业有限公司1序号设计(审核)(工艺)处数标注23技术要求:1.表面光滑无毛剌;2.端子与导线连接紧固;4导线1铁氟龙管1 L铁氟龙管 mm 2客户确认56连接器端子C3-2Y白色C31271外胶内纤管 4 ∅L=90mm电子实业有限公司规格书R25℃=XXXKΩ±1% 页码:第3页共11页NTC负温度系数热敏电阻B25/50=XXX±1% 1.电气性能项目技术要求测试条件/测试方法测试仪器1.1 额定零功率电阻R25℃=100KΩ±2%环境温度范围25℃±0.1%放2小时测试仪表精度≤±0.2%测试功率≤±0.2mW1.2 B值B25/50=3950±1%B=Ln(R25/R50)/(1/273.15+50)-1/(273.15+25)环境温度: 25℃±0.1℃. 50℃±0.1℃测试仪表精度; ≤±0.2%1.恒温油槽宁波2. 水银温度计(北京玻璃研究院)3. LCR数字电桥1.3 耐压1500VDC/0.5mA.10S无击穿或飞弧现象耐压测试仪(南京长盛)1.4 绝缘电阻≥100ΜΩ/500VDC绝缘电阻测试仪(常州惠发电子有限公司)1.5 耗散系数δmax2.5mw/℃(静止空气中)δ=W/(T-T0)=l²R/(T-T0)1.6 时间常数τmax 10S (静止空气中)零功率状态下由一个特定温度向另一个特定温度突变时阻值变化63.2%所需时间1.7 工作温度-20℃--+200℃1.8 最大功率Pmax 5mw2.可靠性2.1 高温存放200℃环境中放置1000小时阻值变化不大于±2% 101-1型恒温干燥箱(设备有限公司)2.2 低温存放-20℃环境中放置1000小时阻值变化不大于±冰箱2.3 耐温热60℃95%RH存放1000小时阻值变化不大于±2%2.4 耐温度冲击-20℃30分钟—常温5分钟—70℃30分钟循环冲击3次后,阻值变化不大于±2%.101-1型恒温干燥箱(上海沪越实验设备有限公司)BCD-232容声冰箱2.5 引线强度引线沿轴向施加20N拉力并持续60S后,外观无损伤.阻值变化不大于±1%SLJ型拉力计(温州山度)VD9806型数字万用表2.6 振动元件经受加速10g,振幅1.5mm频率从10HZ到500HZ X.Y方向各15分钟后应无损伤,阻值变化不大于±2%VD9806型数字万用表2.7使用寿命正常使用电阻值年飘移率≤3‰3.其它性能3.1 外观无可见性损伤目测4.使用环境条件相对湿度: ≤±95%HK 振动频率: 10—500HZ 大气压力:40Kpa 加速度: 250m/S 贮存温度: -5℃--40℃R25=100KΩ 精度:±1% B25/50=3950K B25/85=4092K 精度:±1%(P182-6B2) 电阻(KΩ) 电阻精度(%) 温度精度(℃)温度(℃) 最小值 中心值 最大值 △R -△R △T -△T -55 20623.500 21986.100 23436.400 6.596 -6.197 0.715 -0.672 -54 17809.100 18957.600 20178.200 6.438 -6.058 0.712 -0.670 -53 15466.500 16440.600 17474.200 6.287 -5.924 0.709 -0.668 -52 13504.600 14335.400 15215.800 6.141 -5.795 0.706 -0.666 -51 11851.500 12564.000 13318.100 6.001 -5.671 0.703 -0.664 -50 10450.700 11064.900 11714.100 5.867 -5.551 0.699 -0.662 -49 9257.290 9789.400 10351.000 5.737 -5.435 0.696 -0.659 -48 8235.230 8698.310 9186.510 5.612 -5.323 0.692 -0.657 -47 7355.590 7760.350 8186.560 5.492 -5.215 0.689 -0.654 -46 6594.960 6950.200 7323.840 5.375 -5.111 0.685 -0.651 -45 5934.270 6247.250 6576.080 5.263 -5.009 0.681 -0.649 -44 5357.900 5634.670 5925.140 5.155 -4.911 0.678 -0.646 -43 4853.030 5098.620 5356.100 5.049 -4.816 0.674 -0.643 -42 4409.040 4627.670 4856.660 4.948 -4.724 0.670 -0.639 -41 4017.110 4212.340 4416.620 4.849 -4.634 0.666 -0.636 -40 3669.900 3844.740 4027.520 4.753 -4.547 0.662 -0.633 -39 3361.230 3518.250 3682.230 4.660 -4.462 0.657 -0.630 -38 3085.930 3227.300 3374.810 4.570 -4.380 0.653 -0.626 -37 2839.610 2967.200 3100.210 4.482 -4.300 0.649 -0.622 -36 2618.550 2733.970 2854.190 4.397 -4.221 0.644 -0.619 -35 2419.590 2524.220 2633.120 4.314 -4.145 0.640 -0.615 -34 2240.020 2335.070 2433.910 4.232 -4.070 0.635 -0.611 -33 2077.520 2164.020 2253.910 4.153 -3.997 0.631 -0.607-32 1930.090 2008.970 2090.850 4.076 -3.926 0.626 -0.603 -31 1796.020 1868.050 1942.780 4.000 -3.856 0.621 -0.599 -30 1673.800 1739.690 1808.000 3.926 -3.787 0.616 -0.594 -29 1562.140 1622.510 1685.040 3.854 -3.720 0.611 -0.590 -28 1459.910 1515.290 1572.610 3.783 -3.654 0.606 -0.585 -27 1366.120 1417.000 1469.610 3.713 -3.590 0.601 -0.581 -26 1279.910 1326.700 1375.060 3.645 -3.526 0.596 -0.576 -25 1200.520 1243.600 1288.100 3.578 -3.464 0.590 -0.571 -24 1127.280 1166.990 1207.980 3.512 -3.402 0.585 -0.567 -23 1059.590 1096.230 1134.020 3.447 -3.342 0.579 -0.562 -22 996.936 1030.770 1065.650 3.383 -3.282 0.574 -0.557 -21 938.848 970.126 1002.340 3.321 -3.224 0.568 -0.552 -20 884.914 913.850 943.637 3.259 -3.166 0.562 -0.546 -19 834.767 861.555 889.114 3.198 -3.109 0.557 -0.541 -18 788.078 812.895 838.409 3.138 -3.052 0.551 -0.536 -17 744.551 767.557 791.194 3.079 -2.997 0.545 -0.530R---T分度表 :- 传真:- 地址:15座4楼 网址:www..com 电子邮箱:@.comR25=100KΩ 精度:±1% B25/50=3950K B25/85=4092K 精度:±1%(P182-6B2) 电阻(KΩ) 电阻精度(%) 温度精度(℃)温度(℃) 最小值 中心值 最大值 △R -△R △T -△T -16 703.923 725.262 747.173 3.021 -2.942 0.539 -0.525 -15 665.955 685.759 706.082 2.963 -2.887 0.533 -0.519 -14 630.435 648.823 667.681 2.906 -2.834 0.526 -0.513 -13 597.168 614.249 631.756 2.850 -2.780 0.520 -0.507 -12 565.979 581.853 598.112 2.794 -2.728 0.514 -0.502 -11 536.711 551.468 566.575 2.739 -2.675 0.507 -0.496 -10 509.220 522.943 536.983 2.684 -2.624 0.501 -0.490 -9 483.374 496.140 509.192 2.630 -2.573 0.494 -0.483 -8 459.056 470.934 483.071 2.577 -2.522 0.488 -0.477 -7 436.156 447.211 458.499 2.524 -2.471 0.481 -0.471 -6 414.576 424.866 435.367 2.471 -2.421 0.474 -0.465 -5 394.224 403.803 413.574 2.419 -2.372 0.467 -0.458 -4 375.018 383.937 393.028 2.367 -2.322 0.460 -0.452 -3 356.881 365.185 373.645 2.316 -2.274 0.453 -0.445 -2 339.742 347.475 355.348 2.265 -2.225 0.446 -0.438 -1 323.538 330.738 338.065 2.215 -2.177 0.439 -0.431 0 308.207 314.913 321.731 2.165 -2.129 0.432 -0.425 1 293.697 299.940 306.285 2.115 -2.081 0.425 -0.418 2 279.954 285.767 291.671 2.066 -2.034 0.417 -0.411 3 266.934 272.345 277.838 2.017 -1.986 0.410 -0.404 4 254.590 259.627 264.737 1.968 -1.940 0.402 -0.396 5 242.884 247.572 252.325 1.919 -1.893 0.395 -0.389 6 231.778 236.139 240.559 1.871 -1.847 0.387 -0.382 7 221.236 225.293 229.402 1.823 -1.800 0.379 -0.374 8 211.226 214.999 218.817 1.776 -1.754 0.371 -0.367 9 201.717 205.225 208.772 1.728 -1.709 0.364 -0.359 10 192.681 195.941 199.236 1.681 -1.663 0.356 -0.352 11 184.092 187.121 190.180 1.634 -1.618 0.348 -0.344 12 175.925 178.737 181.576 1.588 -1.573 0.340 -0.336 13 168.157 170.767 173.400 1.541 -1.528 0.331 -0.328 14 160.766 163.187 165.628 1.495 -1.483 0.323 -0.320 15 153.731 155.976 158.237 1.449 -1.439 0.315 -0.312 16 147.034 149.114 151.208 1.404 -1.394 0.306 -0.304 17 140.657 142.582 144.520 1.358 -1.350 0.298 -0.296 18 134.582 136.364 138.155 1.313 -1.306 0.289 -0.287 19 128.794 130.442 132.097 1.268 -1.262 0.280 -0.279 20 123.279 124.800 126.328 1.224 -1.219 0.271 -0.270 21 118.021 119.425 120.834 1.179 -1.175 0.262 -0.261 22 113.009 114.303 115.600 1.135 -1.132 0.252 -0.251 23 108.229 109.420 110.614 1.090 -1.089 0.240 -0.240R---T分度表 :- 传真:- 地址:15座4楼 网址:www..com 电子邮箱:@.com。
电饭煲热敏电阻什么样子?细长的,有点像蝌蚪样子。
电饭煲热敏电阻的参数..品牌:Minda 型号:cwf种类:温度材料:混合物材料物理性质:绝缘体材料晶体结构:多晶制作工艺:集成输出信号:模拟型防护等级:a线性度1(%F.S.)迟滞:1(%F.S.)重复性:1(%F.S.)灵敏度:1 漂移:0.005分辨率:0.1电饭煲热敏电阻的特点..1.CWF系列产品为NTC热敏电阻温度传感器2.产品性能稳定、可长期工作(年电阻值漂移率≤5‰)3.电阻值和B值精度高、一致性好、可互换(电阻值和B值精度分别可达±1%)4.灵敏度高、反应速度快,电阻温度系数可达–(2~5)%/℃5.具有良好的绝缘密封性和抗机械碰撞、抗折弯能力、可靠性高6.可根据使用的安装条件封装,便于用户安装7.测试精度高苏泊尔各型号电饭煲热敏电阻阻值一览表型号上传感器阻值下传感器阻值精度CFXB** FC5 R25℃=100K±1%R25℃=100K±1%CFXB** FC10 R25℃=103K±1%R25℃=50K±1%CFXB** FZ8 R25℃=103K±1%R25℃=50K±1%CFXB** FZ9 R25℃=100K±1%R25℃=50K±1%CFXB** FC11 R25℃=50K±1%R25℃=50K±1%CFXB**YC/D9A R25℃=50K±1%R25℃=100K±1%CFXB** YC/D4A R25℃=50K±1%R25℃=50K±1%CFXB** FC7A R25℃=100K±1%R25℃=50K±1%CFXB** FZ7A R25℃=100K±1%R25℃=50K±1%CFXB16YD/Z2 R25℃=50K±1%R25℃=50K±1%CFXB15YD/Z4 R25℃=50K±1%R25℃=50K±1%CFXB** FD/C/Z6A R25℃=50K±1%R25℃=50K±1%CFXB** FD/C/Z4A R25℃=50K±1%R25℃=50K±1%美的电饭煲的热敏电阻阻值是多大的?美的豪华电饭煲,插上电就出现C4故障代码,发热板上的有35K,盖上的热敏电阻只有305欧了,请教师傅它的阻值是多大的?修过的师傅表示:阻值57K 上盖61K。
NTC热敏电阻参数表一、引言在电子领域中,热敏电阻(NTC)是一种重要的元器件,用于测量和控制温度。
热敏电阻的特性与温度呈负相关关系,即电阻值随温度的提高而下降。
为了能够正确选择和应用热敏电阻,我们需要了解其参数表和特性。
二、热敏电阻参数表下面是一份典型的NTC热敏电阻参数表,其中包含了常见的参数和对应的数值。
这些参数表述了热敏电阻的特性和性能。
2.1 电气参数•额定功率:热敏电阻能够承受的最大功率。
•额定电阻值:在参考温度下的电阻值。
•电阻温度系数(B值):用于描述热敏电阻电阻值随温度变化的速率。
•额定电阻漂移:在一定温度范围内电阻值的变化。
•漏电流:在额定电压下,热敏电阻的电流泄漏到地的量。
2.2 热学参数•热导率:描述热敏电阻材料导热性能的参数。
•热时间常数:描述热敏电阻响应温度变化的速度。
•热电阻时常:在一个温度变化周期内,电阻值遵循热敏指数。
2.3 尺寸参数•外观尺寸:热敏电阻的外形形状和尺寸。
•导线长度:热敏电阻的引线长度。
•安装方式:热敏电阻的安装方式,如贴片、插装等。
三、热敏电阻参数的意义和应用了解和理解热敏电阻参数表的意义对正确应用和选择热敏电阻非常重要。
3.1 电气参数的意义和应用额定功率是热敏电阻能够承受的最大功率,超过额定功率可能会导致电阻烧毁。
额定电阻值是在参考温度下的电阻值,用于计算温度变化时的电阻值。
电阻温度系数(B值)是衡量热敏电阻电阻值随温度变化的速率的重要参数,可以根据B值计算任意温度下的电阻值。
额定电阻漂移描述了电阻值在一定温度范围内的变化,这对于要求精确测量和控制温度的应用非常重要。
漏电流描述了电阻在额定电压下的电流泄漏情况,对于高阻抗电路的应用很重要。
3.2 热学参数的意义和应用热导率是描述热敏电阻材料导热性能的参数,高热导率可以更快地将温度变化传递给热敏电阻。
热时间常数描述了热敏电阻响应温度变化的速度,可以用来评估热敏电阻的灵敏度和响应速度。
热电阻时常是在一个温度变化周期内,电阻值遵循热敏指数的时间,可以用来判断热敏电阻的稳定性和温度响应的准确性。
APPLICATIONS
Temperature test in all kinds of air-condition,refrigerator,water boiler,microwave oven.
PART NUMBERING
FEATURES
High precision and high stability Quick temperature response Resistant to heat shock Moisture resistant
Excellent quality and high stability
Guang Dong Fenghua Advanced Technology (Holding)Co.,LTD.code
NTC
NTC temperature sensors code
25
Rated zero-power resistance R unit:
The first two are significant figure of resistance and the third one expresses number of following zeros
25
FH -CWF
XXX
X XXXX
X
X /XXXX
X
%
Tolerance of R %
25
B B value Code
B
%Tolerance of B value %
B
B value Temperature Code
Length of the sensor unit:mm
Termination shape code
NTC
NTC THERMISTOR TEMPERATURE SENSORS
APPEARACE AND DIMENSIONS
C
Pour type
type C
SHELL PARAMETER
E EPOXY TYPE TYPE E
NOTE We can absolutely design NTC Sensors as your requirement.
shell
PVC
R 10
10
Rated zero-power resistance
R 10
10
0.5%
1%
2%3%5%Resistance tolerance 0.5%
1%2%3%
5%.
B 25/50
25/85
2500
5000K
B Constant 25/50
or 25/852*******K.
B
0.5%
1%
2%3%
5%.Tolerance of B-constant
0.5%
1%
2%
3%
5%.
40
100
Operating temperature
40100C
2.0
4.0mw/
E
3.0
4.5mw/.Dissipation factor (in still air)
type C 2.0 4.0mw/
type E
3.0
4.5mw/.
C
30s E 20s.
Thermal time constant (in still air)
type C
30s type E 20s.
R T
R T characteristics
25
25
2
6
2
6
PERFORMANCE PARAMETER
NTC
NTC THERMISTOR TEMPERATURE SENSORS
R T characteristics
NOTE We can absolutely design NTC sensors as your requirement.
1.
R 25
1.Rated zero-power resistance (R )
The zero-power resistance at 25(298.15K).2.B
B=ln(R /R )/(1/T1-1/T2)
R T1
R
T2
25
25T1T2T1
T2
THE MAIN CHARACTERISTICS
2.B value
B value is expressed by the following equation:B=ln(R /R )/(1/T1-1/T2)R Resistance at T1(K).R Resistance at T2(K).
3
63.2%
C
=C/
3.Thermal time constant
The time necessary for a thermistor to vary its temperature by 63.2%of the total difference its initial temperature and its final temperature when it is subjected to a temperature step under zero-power conditions.
4
=P/T
4.Dissipation factor
The quotient of the change in power dissipation in a thermistor and the Resultant temperature change of the element.
T1T2T1T25.
=1/R dR /dT =-B/T
T R T
T K
B
B
(K)
5.Temperature coefficient at zero-power of the resistance At a specific temperature T
is a ratio of the zero-power resistance change with temperature
and the zero-power resistance.
=1/R dR /dT =-B/T T
T
T T T
T T
T
T
T T 2
2
NTC
NTC THERMISTOR TEMPERATURE SENSORS
RELIABILITY CHARACTERISTICS
FH-CWF502F3470FA/
B(25/50)3470K1%R255K1%NTC
NTC THERMISTOR TEMPERATURE SENSORS
ATTENTIONS OF ORDER
Please comment the next if you want to make some order:
1APPLICATION
Such as temperature survey,control,compensating and so on.
2SERVICE ENVIROMENT
Such as atmosphere,water,moisture and so on.
3THE WORKING RANGE OF TEMPERATURE
()()
4ITEM NAME FORM AND SIZE
5THE RESISTANCE VALUE
K%at()
6B THE VALUE OF B
B(/)=()K%
7THERMAL TIME CONSTANT
()()
()S()S()enviroment
8DISSIPATON FACTOR
mW/
9OTHER SPECIAL TECHNICAL CONDITIONS
Attentions:If the service request you want is out of the list parameter,please contact with us,and we will design and manufact as your requirement.。