Dry running is one of the most common reasons why centrifugal pumps can fail during operation. The TLS from Sondermann-Pumpen + Filter can prevent this.
The special feature: The new sensor works without contact from the outside and can simply be clamped onto the pipe - making this solution perfect for retrofitting. A clear advantage for the user.
If the pump runs dry, it is no longer supplied with sufficient liquid because there is not enough lubrication in the bearing or the mechanical seal. A total loss can occur, the productivity of the system is reduced and the entire process is disrupted. Sondermann Pumpen + Filter GmbH & Co. KG has developed the TLS dry-running and empty level sensor so that the operator can react to this condition at an early stage. The TLS-1 version of the new development can be installed and piped into the pipeline. In the TLS-2 version, however, it can also be screwed onto an existing pipeline from the outside thanks to its non-contact mode of operation. The operator can easily retrofit his system with the new sensor without having to open the pipework - a clear advantage. This also prevents leaks and eliminates the need for wearing parts.
Functional principle
The TLS detects the electric field that is created in the pipe when the liquid flows through it. The field changes if there are air bubbles or foam - typical signs that the container is almost empty and the drum or stationary centrifugal pump is only drawing in air. The sensor reports the change to the control unit - or to the Safetec evaluation unit, which reliably displays the current status at all times. The evaluation unit is designed as a local control unit with a main switch, on/off button and timer, which can also suppress air bubbles that occur briefly. The TLS can also be connected to an existing PLC.
This means that the new sensor from Sondermann protects the pump and reliably monitors the operating status without the need for personnel to be on site. Because the TLS works safely and without contact outside the liquid flow, the chemicals can use the full nominal cross-section of the pipe. There is no additional pressure loss.
Practical operation
Operators benefit from the new TLS from Sondermann across the board. When pumping chemicals, cleaning agents or solvents from intermediate bulk containers (IBCs) or drums, for example, the sensor signals in good time when the storage container is empty. The employee knows when to change the container before the pump is damaged. It also happens that permanently installed pumps repeatedly run dry due to the process. The TLS recognizes these situations and switches the pump off. Expensive damage is thus avoided. This also applies to incorrectly set valves in the system. This is because these can result in the pump not being supplied with liquid.
