The operating principle for all Hycontrol vibrating probe level switches is the same: a piezoelectric crystal forces a blade to oscillate at its fundamental frequency (also referred to as the natural resonance). When the blade of the probe comes into contact with the process media, this dampens the natural oscillation frequency; the electronics sense the change in frequency which causes the unit to switch.

The DP600 probe is the most straightforward vibrating unit from Hycontrol; it offers a basic, low-cost solution for many simple point switching applications. It has a single solid stainless steel rod vibrated by the piezoelectric element.

Thanks to its small size, it is ideal for use in small hoppers containing granular materials or pellets, such as plastics, food or grain. ATEX options are also available.

However, users must be aware that the circular construction of the DP600 means that it is not as sensitive to light materials. The DP600 probe should, therefore, be used only on products and materials with a bulk density more significant than 90 grammes per litre. If greater sensitivity is required, Hycontrol strongly recommends the DP120 vibrating probe.