
Application in branche-groups
To allow easy use of this catalogue, we have classied our
products with regard to different industry sectors.
Each sector makes special demands on the products
and the materials used.
Our individually combinable probe systems take account of
these demands - that is what makes them so outstanding.
In each chapter, the relative elds of application of the probes
are indicated by the corresponding symbol.
Chemical industry:
• Both tank and continuous level monitoring in dosing-lling
machines
• Corrosion resistant material
• Process safety ensured by probes approved according to
WHG §19 (German Water Management Act)
Water and waste water:
• Liquid monitoring by means of capacitive level monitoring and
leakage probes
• Safe monitoring of critical processes ensured by probes
approved according to WHG §19 (German Water Management Act)
Food + pharmaceutical industry
• Corrosion-resistant material
• Product safety owing to the high-quality materials V4A,
PTFE and PEEK
• Continuous adaption of common standards and regulations
Mechanical engineering:
• Numerous capacitive sensors for use in the eld of tank
monitoring
• Special sensors for hydraulic oil level monitoring
• Leakage sensors for safety monitoring
Two-component systems:
• Almost 30 years of experience in the two-component
system sector
• Sector-specic individual solutions
• Air bubble detector for monitoring gas and air pockets in the medium
测量原理测量原理
我公司的电容式液位传感器的测量原理是基于容器内电容的变
化,在这种情况下,液位传感器的探测棒与容器壁形成正负两
极,容器内的液体(或固体)充当电介质。容器内液位的变化引
起电容的变化,一个空的容器内电容较低,而一个装满液体的容
器内电容就较高。
选择标准选择标准
容器材质:
如果是金属材质的容器,选择单探测棒的液位传感器即可。
如果是塑料材质的容器,单探测棒或者双探测棒的液位传感器均
可供选择。
液体(或固体)介质:
油性介质只需介电常量高于1.8的液体均可以测量,水性介质如
果介电常量较高(高于80)的话,测量精度则与探测棒的绝对长
度有关。
温度和压力:
一体式的液位传感器中与探测棒紧密连接在一起的放大器可在
0-70°C环境下正常工作,而通过导线外接放大器的分离式液位传
感器,其探测棒可承受的最大工作温度可达230°C,同时容器中
的最大压强不能超过10bar。
防护等级与连接器件:
所有的产品均具有高达IP67的防护等级。依据不同的设计,我们
的产品可使用M8连接器、M12连接器或固定连接导线的方式来
传输信号。
电容式液位传感器的测量原理和选择标准
PRINCIPLE OF CAPACITIVE MEASUREMENT AND SELECTION CRITERIA
行业应用案例行业应用案例
为便于理解本目录,我们将产品根据不同工业领域的应用做了分
类。
不同的领域对产品和材质有着不同的要求。
而我们独特的探测系统兼顾了这些不同的要求,从而使其在不同
领域均可得到广泛应用。
在后面章节中,不同型号的产品所能应用的领域都会标注有如下
相应的图案。
化工行业:化工行业:
• 在注料设备中既可以对存料设备进行监测,也可以对注入产品的
液位进行监控
• 防腐材料设计
• 符合WHG(德国水系统管理法)第19条规定,从而保证过程自
动化的绝对安全
水及废水:水及废水:
• 通过液位传感器以及泄漏检测器对液体进行监测
• 通过探测棒对关键程序进行安全监测,符合WHG(德国水系统
管理法)第19条规定
食品及制药:食品及制药:
• 防腐材料设计
• 使用高质量的不锈钢(V4A)、特氟龙(PTFE)及PEEK等材料
保证生产安全
• 不断适应通用标准及法规
工程机械:工程机械:
• 多款电容式感应器可应用于存料设备监测
• 有特殊的传感器可应用于液压油位监测
• 可应用于安全监测中的泄露检测器
双组分系统:双组分系统:
• 逾30年的双组分系统领域应用经验
• 可根据不同行业制定相应解决方案
• 可用于监测介质中的空气及气泡
工程机械 化工行业
双组分系统
水 / 废水 制药工业
食品饮料行业
Mechanical
engineering
Chemical
industry
Two-component
system
Water /
waste water
Pharmaceutical
industry
Beverage and
food industry
∆C
Measuring principle
The functional principle of our capacitive level measurement
is based on a changing condensator capacity. In this case,
the probe rod and the tank wall form the two electrodes; the
medium functions as dielectric medium. A level change causes
a change in capacity. An empty tank has a low capacity; a lled
tank has a high one.
Selection criteria
Tank material:
In metal tanks, one-rod probes are used.
In plastic tanks either the double-rod probe or
the one-rod probe is used.
Media:
Oily media with a DK value* higher than 1.8 can be detected
without any problems. In the case of watery media with a high
DK value (>80), measurement accuracy is related to the
absolute rod length.
Temperature and pressure:
The temperature range of the medium of the compact probe
(CAPselect) is 0...+70 °C. The probe can be used with a
maximum temperature of 230 °C if provided with an external
amplier. However, the maximum tank pressure of 10 bar must
not be exceeded.
Protection class and device connection:
The different versions are available with a protection class up to
IP67. Depending on the design, the device is connected using
a M8 connector, a M12 connector or a xed cable.
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