Vibration Switches  Manufacturers, Traders, Suppliers

We are your competent partner for level measurement in all kind of solids applications.
Our strengths are in bulk solid handling based on our product lines Rotonivo, Vibranivo, Capanivo, Nivobob (UWT plumb bob system) and Nivowave, but we also offer competent solutions for other tasks.
Worldwide we are renowned for our ability to provide customized solutions.
Our products are distinguished by their easy handling, extreme reliability and high durability.

As an expert for Level control in bulk solids we have been offering our customers individual solutions for their applications since 1977. Our core competence, however, has remained the same over the years - technical development, production and sales of ingeniously simple and high qualitiy sensors for Level measurement and Monitoring in bulk and solid materials.
Our core industries are: Building & Cement, Chemicals, Food, Animal Feed, Environment & Recycling, Power, Synthetics, Wood, Rubber, Metal, Glass and Others.
Companies around the world continue to value and appreciate the customised solution for their applications, the easy handling, complete reliability and durability of the UWT devices.

PTL Hermann GmbH develops and manufactures vibration type level switches for detecting the presence or absence of powdered or granular solids that are stored in all kinds of silos, hoppers and containers. The products get distributed worldwide.
Principle of operation:
a vibrating system gets forced to vibrate on its resonance frequency by a piezo crystal drive. If filling material, (bulk solids), covers the vibrating blade of the probe, its vibration gets damped. This is sensed by the electronic circuit and the output switches. When the blade gets uncovered due to declining level, the instrument restarts to vibrate and the output switches back.

Product Overview
LEVELSWITCH CV120 / CV130 / CV140 / CV150
Vibrating level switch for all kinds of powdered and granular solids. Applicable for heavy materials like cement as well as for light materials with densities down to 20 grams/litre. Grain size from powder to max. 40mm. Process connection 11/2", insertion lengths 172mm up to 20m.
STOCKTROL CV210 / CV310 / CV410 / CV510
Vibrating level switch for all kinds of powdered and granular solids. For heavy materials as well as for extremely light materials like styrofoam with densities even down to 10 grams/litre. Grain size from powder to max. 20mm. Process connection 11/2", insertion lengths 190mm up to 20m
CV600/CV660
Low-Cost vibrating level switches for grained and granular solids with minimum densities of 20 grams/litre (CV660: 50 grams/litre) and max. grain sizes of 10mm. Process connection 1", insertion length 157mm
SHT 120/130/140
Vibrating level switch for powdered and granular solids with high process temperatures up to 250°C. Process connection 11/2", insertion lengths 184mm up to 4m.

The instruments can be used for overfill protection, for high or low level alarm and in a special configuration for the detection of interfaces, e.g. sand that has settled in water (special model SEDIMENT).
The unique, patented single rod designs of our instruments make them work perfectly and reliably even at critical applications where conventional products cause problems due to bridge building, material build-up or rat holing.