ABB Measurement & Analytics Vibrating Fork Level Switch Resonator™ - RS85

Description
The resonant frequency is continuously monitored for changes created by a wet or dry sensor and an alarm is provided via relay. The RS85 should be used when the application requires optional process connections, exotic materials of construction, coatings, finishes or adjustable time delay and density set point.
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Description
The resonant frequency is continuously monitored for changes created by a wet or dry sensor and an alarm is provided via relay. The RS85 should be used when the application requires optional process connections, exotic materials of construction, coatings, finishes or adjustable time delay and density set point.
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Datasheet
Datasheet Summary
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The RS85 is a vibrating fork level switch designed for liquid level detection in industrial applications, using a piezoelectric-driven tuning fork whose resonant frequency changes when immersed in liquid. It features built-in temperature compensation, LED status indicators, and a self-test function that detects sensor damage with a blinking red LED. The sensor is unaffected by coating unless the fork gap is bridged, making it suitable for viscous, aerated, or coating-prone fluids. The device outputs a relay signal based on level state and is mounted with a 3/4 inch NPT thread. Dimensions include a probe length of 11 inches (279 mm) and a fork tip trip point 3/4 inch from the end.

Datasheet Summary
Powered by GS/AI

The RS85 is a vibrating fork level switch designed for liquid level detection in industrial applications, using a piezoelectric-driven tuning fork whose resonant frequency changes when immersed in liquid. It features built-in temperature compensation, LED status indicators, and a self-test function that detects sensor damage with a blinking red LED. The sensor is unaffected by coating unless the fork gap is bridged, making it suitable for viscous, aerated, or coating-prone fluids. The device outputs a relay signal based on level state and is mounted with a 3/4 inch NPT thread. Dimensions include a probe length of 11 inches (279 mm) and a fork tip trip point 3/4 inch from the end.

Suppliers

Company
Product
Description
Supplier Links
Vibrating Fork Level Switch - Resonator™  - RS85 - ABB Measurement & Analytics
Zurich, Switzerland
Vibrating Fork Level Switch
Resonator™ - RS85
Vibrating Fork Level Switch Resonator™ - RS85
The resonant frequency is continuously monitored for changes created by a wet or dry sensor and an alarm is provided via relay. The RS85 should be used when the application requires optional process connections, exotic materials of construction, coatings, finishes or adjustable time delay and density set point.

The resonant frequency is continuously monitored for changes created by a wet or dry sensor and an alarm is provided via relay. The RS85 should be used when the application requires optional process connections, exotic materials of construction, coatings, finishes or adjustable time delay and density set point.

Supplier's Site Datasheet

Technical Specifications

  ABB Measurement & Analytics
Product Category Level Sensors
Product Number Resonator™ - RS85
Product Name Vibrating Fork Level Switch
Device Classification Sensor Only
Repeatability (Point Level) 0.1000 +/-inch (2.54 +/-mm)
Number of Switch Points Range 1 (#)
Media Type Liquid
Level Measurement Type Single Point or Multi-Point Level
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