Overfill protection in tomato paste

Capacitance level measurement of hygienic design and chemically compatible with aggressive applications for the cleaning process. Tip Sensitivity & Inverse Frequency Shift Technology!


A well-known manufacturer of different foods within the Latin American markets implemented the capacitance level indicator Capanivo® from UWT GmbH for his tomato paste container at the Lima location. For full detection the CN 7 series was applied, which has process connection made of stainless steel and PPS probe (Polyphenylene Sulfide), a hygienic plastic, chemically compatible with aggressive applications for the cleaning process. The probe is only 98 mm (3.8 inch) long, so it is suitable for installation in very small spaces. In addition, the IP68 housing is made of polyester and polycarbonate, thus environmentally resistant and properly sealed.


Precise media detection with two wire electronics and “Tip sensitivity”
High application performance & Multitalents in tricky proccesses

Engineers from UWT GmbH organized together with local partner SIERRA Servicios Industriales SAC. some tests to configure the suitable device. With the pasty and adhering medium, the capacitive probe proved to be the optimal solution for the user due to the exact surface detection and integrated "Tip Sensitivity" technology. The devices are equipped with potted electronics and work with the innovative "Inverse Frequency Shift" technology. They have a robust, certified design and the sensors can be easily adjusted to the respective vessel conditions. The food company needed to measure tomato paste at a temperature of 100ºC (212°F). After the material became paste and has lost almost all of the liquid it reaches a very low dielectric value (1.6 – 2.0), however very sticky. Another concern is the chemical resistance to the high temperature of the CIP (Clean-in-place) process with about 90ºC (194°F), together with the Food Grade compatibility. The solution should be highly reliable with a compact probe design because of space-limited tank dimensions and a measuring range of 1.5 meters (4.92 feet). The  Capanivo® CN 7100 level limit sensor has been installed quickly into the process hopper and guarantees a safe flow of media.