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Low maintenance, long life flow switch

HONSBERG part of the GHM Group, has introduced the FF type series flow switch which offers the largest switching value selection as well as the widest housing spectrum with a valve seat design. Additionally, the FF series is low maintenance, long lasting and a low-cost system that gives improved system safety.

The flow switch FF 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 100 ms and high switching value repeat accuracy combines with a minimal pressure loss of less than 0.1 bar.

“The FF series of flow switches come in various housing sizes for high-pressure cleaning technology, industrial washing machines and car washes, as well as refrigeration technology and hydraulic applications, in fact suitable for applications within any sector where water is processed” Jan Grobler, Managing Director of GHM Messtechnik South Africa said.

Grobler added “The simplistic design of the piston valve seat makes it practically maintenance free in all applications. In addition to their fast and precise measurement, the FF series flow switch is a long lasting and low-cost switch making it a preferred choice for applications where flow measurement is required”.

Simple mechanical operating principals enhances durability. The volume flow raises a piston (fitted with a magnet) out from a valve seat against a spring force. The stroke causes a magnetic field changes that actuates a hermetically isolated Reed switch and generates an electrical signal. 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.

With the spring-supported stabilization of the piston and the short installation length of the housing, use is possible in all installation positions.

The flow switch FF 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 giving additional benefits of safety and functional reliability throughout the application.

  • Further information is available from: Jan Grobler, Managing Director, Messtechnik South Africa. Tel: 011 902 0158 email:
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