Level sensors

Level sensors

Level sensors detect a defined limit or continuously measure level in tanks, basins and silos. Applications include filling and emptying control, minimum and maximum level monitoring, and tracking liquid or bulk-solid inventory. Available principles include floats, capacitive sensing, vibrating forks, hydrostatic level probes, ultrasound, radar, conductive level electrodes, rotary paddles and microwave point level detectors. Selection depends on the medium, range, vessel geometry, foam, deposits and agitation. Temperature, process pressure, mounting connection and materials in contact with the product must be checked before selecting the device.

Hygienic level sensors are selected for tanks containing milk, beverages, syrups, sauces and other process liquids, as well as pharmaceutical applications. Point level detection can signal minimum or maximum level; continuous level measurement supports monitoring in process tanks, balance tanks and filling systems. The measuring principle is selected according to the product, foam, deposits and installation conditions.

Potentiometric level measurement is an option for suitable conductive liquids, including viscous or foaming media. Minimum conductivity and compatibility with metallic or non-metallic tanks must be checked for the specific probe. Hydrostatic or differential pressure level measurement requires consideration of liquid density and tank pressure. For hygienic applications, specify the process connection, wetted materials, CIP/SIP cleaning temperature and duration, and required documentation. Hygienic suitability and EHEDG or 3-A status must be verified for the exact sensor and connection.