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电容物位测量
用于液体的连续测量
优点
- 对于电导率为100μS/cm或更高的介质,不需要标定。在出厂时,根据订购的探头长度对探头进行标定(0 % ... 100 %),可以简单而快速的进行调试。
- 通过文本显示器(可选)进行菜单引导式本地配置
- 可用于安全性系统,根据IEC 61508的规定,满足SIL2功能安全性需求
- 与过程接触的材质采用抗腐蚀材料,与介质接触的部件采用FDA推荐材质
- 二阶过压保护,防止来自容器的放电(气体放电器和保护二极管)
- 当介质形成粘附时,可以更换电子插件
- 较短的测量值响应时间
- 在更换电子插件以后,不需重新标定
- 自动检测电子插件
- 监测绝缘损坏、探杆破裂或缆绳撕裂
- 适用于界面测量
应用领域
Liquicap M一体式变送器可用于连续的液体物位测量.
由于探头在制造时不断的进行试验和测试(自密封椎体),非常稳定可靠,可以用于真空,还可以用于最大100bar的过压。密封和绝缘材料可允许的介质容器操作温度为-80 °C ~ +200 °C。
对于电导率为100 μS/cm的液体,测量与介电常数(DK)无关。这样,各种液体可以无需重新标定即可直接测量。
可以用于和Fieldgate(通过Internet计数对测量值进行远程获取)连接使用,Liquicap T是物料库存和优化物流(库存控制)的理想方案。
技术参数
Continuous / Liquids
测量原理
Capacitive
Characteristic / Application
Fully insulated rod probe, for standart- and extreme process conditions (temperature, pressure, build up)
Interface measurement
Interfaces liquid / liquid also with emulsion layers
Supply / Communication
12-36V DC HART
PFM
Accuracy
repeatablity 0,1%
Linearity error for conductive liquids
<0,25%
Ambient temperature
-50°C...+70°C
-58°F...+158°F
Process temperature
-80°C...200°C
-112°F...392°F
Process pressure absolute / max. overpressure limit
Vacuum ... 100 bar
(Vaccum ... 1450 psi)
Main wetted parts
Insulation material: PTFE,PFA
316L
Process connection
G1/2, G 3/4, G 1, G1 1/2 /NPT 1/2, NPT 3/4, NPT 1", NPT1 1/2
Flanges from DN25.../ANSI 1".../JIS...
Process connection hygienic
Tri-Clamp ISO02852 gap free plated
Dairy coupling
Flush-mounted seal
Sensor length
Total length: 6m (20ft)
Inactive length: max. 2m (7ft)
Max. measurement distance
0.1 m ... 4.0 m
(0.3 ft ... 13 ft)
Output
4...20mA HART
PFM
Certificates / Approvals
ATEX
TIIS
NEPSI
WHG/ Overfill prevention
SIL
EHEDG / 3A
GL marine
Options
Separate housing
gas-tight probe seal
Specialities
Inactive length
Factory calibrated
short response time by change of value
Application limits
Insufficient clearance towards ceiling
Changing, non-conductive media, conductivity < 100 μS/cm
Notice the pressure and temperature derating