Direct, reliable, scalable

Flow monitor: dry-running protection for your pump

Our flow monitors monitor the flow of liquids and prevent failures

Flow monitoring that fits seamlessly into your system

Our flow monitors play a central role in safety-relevant and media-critical processes. Whether in cooling circuits, dosing systems, laboratory applications or chemical process engineering - we ensure that the medium flow is monitored before faults occur.

Our technology detects stoppages or leaks and enables immediate intervention without the need for additional sensors.
We do not supply standard devices, but application-specific solutions for your flow monitoring - adapted to the medium, installation situation and signal processing.

Flow monitor with system understanding

Mechanical flow monitors

Simple, robust, proven

Our proven flow monitors with piston principle monitor the media flow. A piston integrated in the housing is moved by the flow and activates a contactless switching contact when a defined flow value is reached.

Flow switch Functional diagram

Contact – Direct & Competent.

Frequently asked questions about flow monitoring

How does a mechanical flow monitor work?
A movable element in the medium ( piston with magnet ) is deflected by the volume flow and switches the reed contact from a certain position. The signal can be integrated directly into control systems - without an additional power supply. This is often referred to as a flow monitor, flow switch or flow switch.
How does the flow switch protect your pump?
If there is a blockage in the supply line of your pump so that water no longer flows, your pump can run dry and even be destroyed. The sensor can detect this blockage and switch off the submersible pump automatically.
What is the difference between a flow monitor and a pressure switch?
- Pressure switch = monitors the operating pressure in the system, switches from a certain switch-on pressure
- Flow monitor = monitors the movement/flow of the medium.
A pressure switch only detects a blocked pipe indirectly - and only in certain cases.

A flow switchimmediately registers when there is no or insufficient medium flow, regardless of the pressure.

This is why it is used especially where it is crucial to determine whether flow is actually present (e.g. cooling circuits, lubricating oil lines).

It serves as dry-running protection for pump control.
What is the difference between a flow monitor and a flow meter?
- Flow meter = measures the flow rate, usually returns this to the system as a frequency, which must evaluate this value
- Flow monitor = monitors the movement/flow of the medium.
The flow meter requires evaluation electronics. It can determine the flow value relatively accurately within a certain range.

A flow switch, on the other hand, only sends a simple switching signal as soon as a flow is reached.
Which installation position is possible?
Many of our flow switches are position-independent. For mechanical variants, we advise on the ideal installation direction to optimize response time and service life.
Can a flow monitor also be used with pulsating currents?
Yes, but the inertia of the sensor must be taken into account. Electronic models with time delay or averaging are often the better choice here.
Can customer-specific switching points be realized?
We offer defined switching points between 0.1 l/min and 2 l/min - tailored to your medium, your line and the desired reaction time.
How is electrical integration into existing systems achieved?
Our models are ready for connection - with cable, plug or open wires. The signal output is a potential-free contact (normally open or normally closed).