The Meister SPKM is a magnetic paddle flow switch engineered for reliable and cost-effective flow monitoring in industrial liquid pipe systems. Its simple yet robust operating principle ensures long-term dependability: a spring-loaded paddle extends into the flow stream, and as the liquid flow rate increases beyond the setpoint, the paddle is deflected. This movement is magnetically coupled to a hermetically sealed microswitch, providing a clean, isolated electrical signal without the need for external power to the sensing element. The device is factory calibrated for horizontal flow but can be mounted in any spatial position, including vertical pipes with upward flow, offering significant installation flexibility.

The SPKM series is designed to handle a wide range of industrial liquids with a flow range of 4 to 93 liters per minute for water. It is built to withstand demanding process conditions, with a maximum operating pressure of 25 bar and a temperature range from -20°C to 110°C. The device exhibits a low sensitivity to dirt and particulates, making it suitable for cooling water, hydraulic fluids, and other non-pure media that might foul more sensitive flow meters. Its design also results in a remarkably low pressure drop of just 0.01 bar, minimizing energy losses in the system. The switch point is field-adjustable via a convenient 7-position adjustment screw, allowing the trip threshold to be precisely tuned to the specific application requirements without complex recalibration.

The SPKM flow switch provides a high-capacity switching output, capable of directly controlling pumps, valves, or signaling alarms without intermediate relays in many applications. The microswitch output is accessible via a standard electrical socket, simplifying wiring and integration. For optimal performance and accuracy, the manufacturer recommends installing the switch in a straight pipe section with a minimum of 20 pipe diameters upstream and 5 pipe diameters downstream of the device. The arrow on the housing clearly indicates the required flow direction. With its combination of robust mechanics, flexible installation, and reliable magnetic actuation, the Meister SPKM is an ideal solution for flow proving in cooling systems and cooling circuits, hydraulic equipment, chemical and pharmaceutical processes, and general industrial flow monitoring.

Technical Specifications