PT100温度传感器三线制ok

1、PT10 0温度传感器品特征1、不锈钢套管封装，经久耐用2、活动螺丝固定，使用方便3、按照国际IEC751国际标准制造，即插即用4、多种探头尺寸可选、适应面广5、高精度、高稳定、高灵敏6外形小巧，经济实用特性指标探头长 度5cm/10cm/15cm/20cm电阻变 化0:0.3851 Q /C螺丝规格/：8*1.0引线接法三线式套管材质不锈钢测温范圈200-400 C探头直彳径：5mm安装方式活动螺丝固定引线长度一般2米，可订制长度(专用引线)接线方式接线叉传感器件T (铂)PT100温度传感器采用三线式接法的原因:处于平衡状态，引线线电阻的变化对测量结果没有任何影响。Rpt1 00100温度

2、传感器0C时电阻值为100 Q,电阻变化率为0.3851 Q / C。由于其电阻值小，灵敏度高， 所以引线的阻值不能忽略不计，采用三线式接法可消除引线线路电阻带来的测量误差，原理如下： PT100引出的三根导线截面积和长度均相同(即r1=r2=，测量铂电阻的电路一般是不平衡电桥， 铂电阻(Rpt100)作为电桥的一个桥臂电阻，将导线一根(r1)接到电桥的电源端，其余两根(r2、 分别接到铂电阻所在的桥臂及与其相邻的桥臂上，这样两桥臂都引入了相同阻值的引线电阻，电桥当R1x( Rx+r2+r33 MGx ( Rpt100+r2+r1 电桥平衡，U=O当RptlOO温变化后j电桥不平衝,U却L礫头

3、氏度L=5C 10Ck 150. 200I 12|2000Hr引线长度PT100PT100原理及分度表电阻式温度传感器(RTD,Resistanee Temperature Detector) 一种物质材料作成的电阻,它会随温度的 上升而改变电阻值，如果它随温度的上升而电阻值也跟著上升就称为正电阻係数 ，如果它随温度的上升而电阻 值反而下降就称为负电阻系数。大部分电阻式温度传感器是以金属作成的，其中以铂(Pt)作成的电阻式温度检 测器,最为稳定-耐酸碱、不会变质、相当线性 ，最受工业界采用。PT100温度传感器是一种以铂(Pt)作成的电阻式温度传感器，属于正电阻系数,其电阻和温度变化的关系式如

4、 下：R=Ro(1+a T)其中a =0.00392,Ro为100Q (在0C的电阻值),T为摄氏温度，因此白金作成的电阻式温度传感器，PT1 00温度传感器分度表温度01.I .356T3电阻值（Q)-200ia 52-19022,6322 4021.9721. S421.1120： 6&20.2519 3219.38IS 35-ISO27, 1028.672b. 2425,0225.3924 9T24 5424. 1123.W23.25-1T031.3430.9130.4930 0729. &429.222B.302B.37E7. 952T 52-16035.5435. 1234. TO3

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