“We recently introduced the FF type series flow switch which has applications specifically suited to the water, oils, gas, food and beverage sectors as well as in general industry where pump protection is required. Its 200-bar pressure and piston valve seat design makes it a unique flow switch for a variety of industry applications” says Jan Grobler, MD, Senseca SA.

The simple mechanical operating principle of the piston valve seat design is space-saving and can be used and installed economically for high unit counts. The design of the flow meter FF is practically maintenance-free across all applications.

The volume flow raises a piston (fitted with a magnet) out from a valve seat against a spring force. The stroke causes a change in the magnetic field, where a hermetically isolated Reed switch is actuated and an electrical signal is generated. With spring-assisted stabilisation of the piston, use in all installation positions is possible. The vertical positioning of the Reed switch, adjusted at the factory, enables recognition of flow rates from approx 2% to 60% of the recommended maximum volume.

Largest value selection

Jan says the Senseca FF Flow Switch offers the largest switching value selection as well as the widest housing spectrum with a valve seat design. It is a cost effective and low maintenance flow switch which delivers improved system safety.

The FF flow switch series consists of housing sizes for nominal pipe widths from DN8 to DN50 and freely selectable switching values from 0.41 l/m. The swift reaction times of less than 100ms supplies a rapid actuation time for applications. An additional highlight of the flow switch is the high switching value repeat accuracy with a minimal pressure loss of less than 0.1 bar.

High pressure cleaning

“The FF series of flow switches suit high pressure cleaning technology applications as they are available in various housing sizes and are in fact suitable for applications within any sector where water, oils and gas are processed” comments Jan.

The simplistic design of the piston valve seat reduces maintenance substantially making it a preferred choice for applications where flow measurement is required. The FF flow switch offers a space saving solution for high unit counts, high efficiency and has a tamper proof switching value offering high system safety.


When applied in process water in industrial systems, frequent contamination situations arise due to sediments and other ordinary content in the water. The filtration is a recommended design feature. The FF flow switch enables horizontal flow through the housing where the vertical functional design is highly resistant to water contaminants.

This results in the filtration efficiency of the overall system being supported delivering enhanced safety and functional reliability throughout the application.

“Your order, we adjust”

The flow switch FF can be ordered to meet specific customer requirements. There is no switching value drift with the FF flow monitor, an advantage in flow monitoring for heat exchangers in cleaning technology applications with hot water systems.

“You order, we adjust. Senseca assures you that your application runs exactly the way you want it to. Individual and tamper-proof. Many industrial applications will benefit from the flow switch FF series. It is uniquely flexible, highly accurate with low costings, making it a preferred choice for flow monitoring applications” Jan concludes.


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