A good way to reduce the number of level measurement options is to categorize them into two broad categories: contact and non-contact. Then you can filter choices by the type of material they can measure.
The characteristics of the process material being measured, such as tank size and shape, the pressure and temperature that the process requires, the amount of material agitation, available power, etc. ,must be taken into account when determining if a contact or non-contact approach is the right option. It should be considered whether the material is corrosive or tacky and could possibly cause damage to the measuring device, whether it is volatile and a contact sensor might create a safety hazard, whether the agitation, temperature, or pressure of the process material could affect the reading of or damage the contact sensor, and any other troublesome possibility.
Dutco Tennant LLC’s portfolio of level measurement encompasses both continuous measuring instruments and level switches. Depending on the application, different measuring principles are used for level monitoring.
The hydrostatic pressure under a static liquid column increases proportionally with the height of the column. Thus, for example, the pressure in a water tank becomes 100mbar higher, compared to the effective atmospheric pressure on the water surface, with every meter of water depth. For indirect level monitoring, pressure measuring instruments are used. Depending on the application, either a submersible pressure sensor is submerged into the tank or another pressure measuring instrument it is attached to the bottom of the exterior of the tank and exposed to pressure of the tank contents through an opening in the bottom of the tank. With float-based measuring systems for level measurement, a distinction is made between float switches, level sensors, and bypass level indicators. Float switches are used for the point-based limit level detection of one or several levels. The simple and proven operation principle of float switches is suitable for a very wide range of applications. It works independently of foaming, conductivity, dielectric, pressure, vacuum, temperature, vapors, condensation, bubble formation, boiling effects, and vibrations. Optoelectronic switches are used in level measurement for point-based limit level detection. They contain an infrared LED and a light receiver within a glass prism. Optoelectronic switches are notable for their compact design and do not feature any moving components. With a measuring tip from borosilicate or quartz glass and robust stainless steel cases, they offer a high media compatibility.
Level measuring instruments meeting all requirements whether you are measuring liquids, slurries or bulk solids, Dutco provides the ideal level measuring instruments for every job. Our best-in-class level measurement devices set the standard in their respective disciplines for water, cement, mining, chemical, petrochemicals, food, beverage, pharmaceutical, and other industries.