Contact-free radar for water treatment slurry
Continuous level measurement technology from UWT was installed for the upgrade of the wastewater system of a company in the food manufacturing industry in Colombia. Together with the local partner INTAI INGENIERIA S.A.S. several on-site tests were carried out and a non-contact solution was preferred. Chemical and disinfectant substances require chemical resistance and a robust design.
Accurate and fast level measurement
The manufacturer of various dairy products needed a reliable solution to control medium solid waste from the plant's effluent treatment process. The concrete tanks are 4 meters long and the material has the consistency of sludge with a DK value of 4. The pressure is in the range of 0.8 bar (11.6 psi) up to 5 bar (73 psi). There is no electrostatic charge. The process temperatures reach up to 80 °C (176 °F). Within the process hoppers there is a high degree of moisture and some build up. Accuracy as well as a quick response time were especially relevant to the process.
Finally, the was implemented into the wastewater treatment system. The certified sensors were configured using suitable manufacturing materials in accordance with the high hygienic requirements and safety levels. A high frequency signal is transmitted with a very small beam angle with two-wire technology. The signal is reflected by the slurry material and received back to the sensor. The frequency difference, which is directly proportional to the distance, is then further processed and output as the level signal. The sensor is ideal for use in water treatment tanks and, due to its design, is also suitable for acids and alkalis. It would even be possible for measurement to be made through the tank top of plastic containers.
The plant operator in Colombia was very pleased about the quick and easy installation of the non-contact NivoRadar® devices. With the PVDF wetted parts and high accuracy of +/-2 mm reliable measuring results are realized. It works smoothly in the demanding measurement conditions and suits also to the outdoor environments as it has ingress protection IP66/ IP67/ IP68. The sensors offer the manufacturer also an attractive price and are maintenance-free.
