UM3K-040GK500 Flow Switch | Senseca UM3K-G

UM3K-040GK500 Senseca UM3K-G Flow Switch

The UM3K-040GK500 is a compact, spring-supported paddle flow switch for monitoring water flow in industrial piping. A magnetically actuated microswitch provides a changeover signal when flow reaches the selected switching point. This configuration uses a G 1 1/2 female-thread process connection, DN 40 nominal size and stainless steel wetted construction.

Key Features

• Nominal pipe size: DN 40
• Process connection: G 1 1/2 female thread
• Wetted construction: Stainless steel
• Switching range code: 500
• Factory reference switching range for water: 37.0–50.0 L/min
• Recommended maximum flow (Qmax): 100 L/min
• Switching principle: spring-supported paddle with magnetic microswitch actuation
• Electrical connection: DIN 43650-A / ISO 4400 plug; optional 4-pole M12 × 1 round connector
• Pressure rating: PN 25
• Ingress protection: IP65

Technical Specifications

• Product family: Senseca UM3K-G
• Reference nominal size: DN 40; connection G 1 1/2
• Media: water as standard; oils, gases and aggressive media are available on request subject to suitability
• Medium temperature: -20 to +110 °C
• Ambient temperature: -20 to +70 °C
• Switching contact: changeover microswitch; max. 250 V AC and 3 A (ohmic load)
• Protection class: Class 2 safety insulation
• Approximate weight: 0.75 kg (datasheet dimensions/weight table)
• Wetted materials for brass construction include nickel-plated CW617N/CW614N and listed internal components; stainless construction includes 1.4305, 1.4571 and listed internal components.

Applications

Suitable for flow proving and flow/no-flow monitoring in water circuits, industrial machinery, plant equipment and utility systems. Confirm medium compatibility, installation conditions and required switching point before ordering.

Installation and Ordering Notes

• Published switching range is for horizontal inward flow with decreasing flow rate; tolerance is ±15% of full-scale value.
• Provide a straight calming section of 5 × DN at the inlet and outlet.
• Standard mounting is horizontal inward flow; mounting position can affect the switching point and range. The switching head is not recommended underneath.
• Install a filter if the medium is contaminated; use a magnetic filter for ferritic components.
• Capacitive and inductive loads require suitable protective circuitry.
• Specify flow direction, medium and switching range when ordering. For oils, provide viscosity, temperature and oil designation; for gases, provide pressure, temperature and medium.

Contact Spectanet for availability, pricing and help selecting the appropriate Senseca UM3K-G flow switch.