首页 > 技术问答 > 电导率仪的介绍及工作原理!

仪器厂家-最新价格单
实验室常规
成都品成纯水机价格单
上海卢湘仪离心机仪器价格单
水质分析
B&X(中国)在线水质分析仪价格单
上海海恒悬浮物测定仪价格单
德国WTW仪器价格单
哈纳HANNA仪器价格单
新加坡优特仪器价格单
哈希HACH仪器价格单
美国奥立龙仪器价格单
江苏盛奥华价格单
韩国HM价格单
美国奥豪斯分析天平价格单
深圳清时捷科学仪器价格单
上海三信仪表厂价格单
上海昕瑞价仪器价格单
上海雷磁厂价格单
天平水分计
上海良平分析天平价格单
梅特勒托利多分析天平价格单
美国奥豪斯分析天平价格单
福建华志分析天平价格单
箱体设备
上海一恒箱体价格单
上海培因仪器价格单
上海博迅箱体价格单
色谱、光谱
深圳清时捷科学仪器价格单
上海美谱达分光光度计价格单
物理光学
日本爱拓(ATAGO)市场价格单
美国BROOKFIELD博力飞市场价格单
江南永新显微镜价格单
上海精科物理光学价格单
农业和食品
上海瑞鑫市场价格单
浙江托普仪器价格单
植物与土壤
浙江托普仪器价格单
环境监测
台湾先驰温湿度计价格单
韩国森美特温湿度计价格单
台湾路昌电子温湿度计价格单
台湾宝华风速计价格单
台湾泰仕温湿度计价格单
台湾泰纳温湿度计价格单
台湾群特温湿度计价格单
台湾得益万用表价格单
西安沃尔电子价格单
行业专用
北京荣阳电泳仪价格单
成都金凤液氮罐价格单
上海昌吉仪器价格单
电导率仪的介绍及工作原理!
2012-12-07 阅读次数 1895

电导率是物体传导电流的能力。电导率测量仪的测量原理是将两块平行的极板,放到被测溶液中,在极板的两端加上一定的电势(通常为正弦波电压),然后测量极板间流过的电流。根据欧姆定律,电导率(G)--电阻(R)的倒数,由导体本身决定的。电导率的基本单位是西门子(S),原来被称为欧姆。因为电导池的几何形状影响电导率值,标准的测量中用单位电导率S/cm来表示,以补偿各种电极尺寸造成的差别。单位电导率(C)简单的说是所测电导率(G)与电导池常数(L/A)的乘积.这里的L为两块极板之间的液柱长度,A为极板的面积。

水的电导率与其所含无机酸、碱、盐的量有一定关系。当它们的浓度较低时,电导率随浓度的增大而增加,因此,该指标常用于推测水中离子的总浓度或含盐量。不同类型的水有不同的电导率。新鲜蒸馏水的电导率为0.2-2μS/cm,但放置一段时间后,因吸收了CO2,增加到2—4μS/cm;超纯水的电导率小于0.10/μS/cm;天然水的电导率多在50—500μS/cm之间,矿化水可达500—1000μS/cm;含酸、碱、盐的工业废水电导率往往超过10 000μS/cm;海水的电导率约为30 000μS/cm。

电极常数常选用已知电导率的标准氯化钾溶液测定。不同浓度氯化钾溶液的电导率(25℃)列于下表。溶液的电导率与其温度、电极上的极化现象、电极分布电容等因素有关,电导率测量仪 上一般都采用了补偿或消除措施。水样采集后应尽快测定,如含有粗大悬浮物质、油和脂,干扰测定,应过滤或萃取除去。


下一篇: 溶解氧仪的工作原理!
上一篇: PH计/酸度计的正确使用与维护!


Push launch TAG Heuer Monaco V4 TAG Heuer The main (N°001/150) of your "150 decades of TAG Heuer" restricted version TAG Heuer Monaco V4, the world's initially ever belt-driven replica watch having a linear oscillating mass, will probably be available on the biennial Only replica watch auction in Monaco on September twenty fourth. Only replica watch is really a charity auction of exceptional replica watches produced by Switzerland's most exceptional replica watch makes. The outstanding event is held each and every two years underneath the patronage of HSH Prince Albert II and also the Monegasque Affiliation. All proceeds from the prestigious sale go to research into Duchenne Muscular Dystrophy, rolex replica watches a genetic ailment affecting just one in every single 3,five hundred boys on the planet. The world's 1st replica watch with ball bearings and belt-drives the latest breakthrough creation by TAG Heuer was introduced being a Strategy replica watch in Baselworld 2004. Now it gets a industrial realty on the eve of your brand's 150 12 months anniversary. The 2009 Only replica watch Monaco V4, N° 1 of minimal series of 150, celebrates 150 yrs of revolutionary in Swiss luxury watchmaking (TAG Heuer was launched in 1860 in Saint-Imier, replica patek philippe Switzerland) and signifies the innovative following step during the daring evolution with the legendary, square-faced Monaco the audacious replica watch initially observed on Steve McQueen's wrist from the 1970 race movie common Le Mans. In vintage TAG Heuer custom, iwc replica Watches the watch's motion represents an entire break almost everything that came before. The pinions with the traditional mechanical movement have been changed within the Monaco V4 which has a patented relay of 5 notched driving belts whose rigidity is managed by turnbuckles. The automatic winding program can be exceptional: the oscillating weight, a 12g tungsten ingot, does not shift back again and forth but up and down on a keep track of among the 4 spring barrels, that are mounted on a V-shaped main plate angled at 15 degrees, like cylinders within a high-end motor racing motor. The audacious look exterior matches the revolutionary motion within. The beveled sapphire crystal, manufactured in 3-D, curves all the way down to be a part of the sides from the situation. The compact 2nd hand is at four:thirty. The folding-buckle bracelet is in elegant alligator. The overall style and design is encouraged through the iconic Monaco, the world's first automated chronograph with microrotor, designed in 1969 and even now forward of its time.