Reliable liquid limit detection should not depend on conductivity, dielectric constant, foam-free conditions or a clean optical path. Vibrocont SCM 300 uses a compact vibrating fork to detect liquid coverage in tanks, vessels and pipes, including cleaning and filter systems as well as coolant and lubricant tanks.
The piezoelectric drive excites the fork at its resonance frequency. When liquid covers the fork, the resonance changes and the electronics issue a switching signal via DC-PNP or AC/DC output. This makes the sensor a practical alternative where float, conductive, capacitive or optical principles are affected by deposits, turbulence, flow or air bubbles.
With its small device dimensions, any mounting position and process pressure from -1 to 40 bar, Vibrocont SCM 300 fits demanding installations. Versions are available for medium temperatures up to +150 °C, and WHG-approved variants support use as overfill protection and leak detection systems.
The piezoelectric drive excites the fork at resonance frequency. Liquid coverage reduces the resonance, which the electronics evaluate.
The sensor is used for overfill protection and pump protection in tanks, vessels, pipes, cleaning systems, filter systems and coolant or lubricant tanks.
Versions are available with DC-PNP electronics for 10...30 V DC or AC/DC electronics for 20…253 V AC/DC.
Threaded process connections include ISO 228 G½", G¾", G1" and EN10226 R½", R¾" and R1".
Switching time is approximately 0.5 s when covered and approximately 1 s when uncovered, with hysteresis up to 3 mm.
The device is specified for liquid density >0.7 g/cm³, with optional version >0.5 g/cm³, and dynamic viscosity from 1…10 000 mPa·s.
