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Rosemount 2130 vibrating fork level switch. Simple, reliable high/low point level detection for liquids. No calibration — it works right out of the box on virtually any liquid regardless of density, conductivity, or dielectric constant. New in original Emerson packaging.

What You're Getting

The 2130 detects level by vibrating a tuning fork at its natural frequency (~1400 Hz). When liquid covers the fork, the frequency shifts — the electronics detect this and trigger the relay. No moving parts, no calibration, no sensitivity adjustment. It ignores foam, turbulence, bubbles, and coating buildup. The fork is stainless steel with a polished finish that resists product buildup in sticky media (syrups, oils, adhesives). Short fork length (44mm insertion) means it fits in tight spaces — ideal for high/low alarms in tanks, pump protection, and pipe-level detection. Output is a single relay (SPDT), or a direct load switching version for simple pump control without a PLC.