Float Level Switches with Side- and Top-Mount Configurations

The 500 family uses magnetic coupling for point-level switching. Models 500/501/502/503 are side-mounted, 504 is top-mounted, and 505 has an extended neck. Select the configuration against fluid density, viscosity, connections, temperature and pressure for tank alarms and control.

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Model: 500 Series
Category: Level
Revision: Updated 2026-09-24

SPECIFICATIONS

Technical specifications

Parameter	Specification	Unit
Measurement task	Point-level switching; not a continuous level measurement
Contact arrangement	SPDT
Contact rating	Specify the load and confirm AC/DC voltage and current ratings for the supplied microswitch configuration
Liquid viscosity	Less than 200	cP
Switching differential	30 ± 3 with the standard rod	mm
Process connection	500: 1½ in. NPT/PT; 501–504: flange options by model
Pressure configuration	Standard: 1.0 MPa; higher-pressure configurations require confirmation
Temperature configuration	General configuration below 100°C; higher temperatures require cooling fins and application review

Application and selection notes

Keep the cable entry facing down and allow clearance for float movement.
For agitation, solids or high temperatures, provide process details so we can assess an external cage or protective cover.
Maximum temperature and pressure options are not necessarily available together; use the approved configuration.

Verify specifications and options against the documents for your model. Select a technical sheet to enlarge it.