Safe recognition of fill levels for food

13 November 2015

Liquids such as ketchup, mayonnaise and mustard can make things difficulty for level sensors, as they have a tendency to be adhesive or create material build-up on the sensors or container walls. Other products such as milk can foam during processing.  

These effects can cause capacitive sensors to false trigger.  SMARTLEVEL sensors, from Balluff, are said to combat these problems.

New to the existing range is the SMARTLEVEL 500+, a stainless steel M30 sensor with a non-flush Teflon sensing surface.  Designed to work with difficult liquid food products it is able to detect reliably through plastic or glass containers (up to 20mm thick), or by direct contact with the liquid.  The new sensor can also detect high-conductive acids such as sulphuric or hydrochloric and concentrated cleaning agents, even through container walls, says the company.  
Set up is easy as the sensor is able to automatically tune out plastic or other non-conductive wall materials so teach-in or other user interaction is not required. Additionally, where internal installation is required the sensor has a reverse thread for hygiene applications. Once installed SMARTLEVEL sensors automatically find the true liquid level, even changes in liquids during production runs or checking procedures cause these sensors no problem, says the company.

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