Rosemount 2120 Vibrating Fork Level Switch

Rosemount1 configuration

Configure Your Rosemount 2120 Vibrating Fork Liquid Level Switch

Vibrating-fork liquid level switch — fork resonance changes when wet vs dry. Unaffected by flow, turbulence, bubbles, foam, vibration, or solids content. Heartbeat LED indicates operating state. Suitable for overfill protection, water ingress detection, pump-protect, high/low alarm, hygienic, and fine chemical/pharma applications.

Required Specifications

7 of 7 selected

Material of Construction*

Process Connection Size*

Electronic Type*

Hazardous Locations Certifications*

Surface Finish*

Housing*

Fork Length*

A0000

Rosemount 2120 Vibrating Fork Liquid Level Switch Part Number

2120C5RK1NAAA0000

Configured list price:$1,758.68(estimate based on May 2026 Rosemount list; quote may reflect distributor pricing)

Configuration Summary — Rosemount 2120 Vibrating Fork Liquid Level Switch

Base: $744.97

Material of Construction:: CAlloy C (UNS N10002), Alloy C-276 (UNS N10276), solid+$746.72
Process Connection Size:: 5R1.5" (38mm) Tri-clamp+$182.08
Electronic Type:: KNAMUR+$84.91
Surface Finish:: 1Standard Surface Finish
Hazardous Locations Certifications:: NANo Hazardous Locations Certifications
Housing:: AGlass Filled Nylon (M20 Conduits / Cable Threads)
Fork Length:: A0000Standard Length (44mm / 1.7 in)

Rosemount is configurator-heavy and quote-only — Valley Instrument verifies option compatibility, lead time, and pricing before confirming your order.

Pre-configured Options(1)

Rosemount

2120 Vibrating Fork Level Switch

Mid-tier vibrating fork level switch — same fork-resonance principle as the 2110, with expanded electronics options. Choose direct-load relay, 8/16 mA load-driven output for two-state PLC inputs, NAMUR-namur compatibility, or remote-electronics housing. Magnetic test point lets technicians verify operation without process intervention. Used where the 2110's basic relay isn't sufficient — load-driven inputs, harsh ambient, hazardous-area installations.

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