Interface Measurement in solids and Liquids
Not only in the chemical, petrochemical or oil & gas industry, but also in other industries there are applications, e.g. oil & grease separators, where an interface between two liquids or a liquid and foam has to be measured. The main challenge for measurement technology in this case are particularly deposits, buildup, chemicals and emulsion layers that may occur.
Continuous level measurement
With the capacitive sensor NivoCapa® and the guided radar NivoGuide® NG 8000 series, UWT offers two reliable sensor families that meet all expectations of various media, which have to be measured, different requirements as well as installation positions. The capacitive measuring method perfectly suits interface measurements where an emulsion layer developed. Guided radar technology allows concurrent detection of the interface and the total level with only one sensor.
Level limit measurement
The capacitive measurement method is ideal for precisely detecting or measuring the interface between two liquids or between a liquid and foam. Sensors for interface measurement must often have a correspondingly high sensitivity, a high chemical resistance and a robust construction against mechanical stress and deposits or buildup.
With the capacitive sensor Capanivo® 7000 and Capanivo® 8000 series and the RFnivo® 8000 series, UWT provides two product families that can be used specifically for this type of application in their compact, cable or rod sensor versions.
Interface Measurement of Solids in Liquids
There are several industries where sludge levels or solids in liquids need to be detected. For example, in sediment tanks or basins, filters or lamella separators in the metal industry, in chemical plants, in lime or gravel works and in the wastewater industry. What matters here is the measurement accuracy and also durability of the sensor technology. Pollution, chemicals and gases often have a negative affect on the sensors and require special resistance.
Continuous level measurement
The plumb bob series NivoBob® NB 3300/3400 meets the requirements of many interface measurements and are very reliable due to the simple measuring principle. A 4-20mA analog signal as well as a Modbus RTU/Profibus DP interface are available for level evaluation.
Level limit measurement
Vibration forks of the Vibranivo® series VN 1000 or VN 5000 can be used to measure limit levels of slurries and solids in liquids. The wetted parts are made of resistant stainless steel. With the VN 1030 and VN 5030 versions, even depths of approx. 4m can be realized when installed from above in a tank or basin. The high sensitivity required for the respective solids detection can be easily set on the electronics.
