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AUTOMATION
For level detection in liquids. For general-purpose use as overfill and dry run protection.
Basic Functions
Min - 1 switching point Max - 1 switch point Run Dry protection Overfill protectionSwitch over by electric connection • Set up without adjustment to medium
• Very high repeat accuracy
• Medium independent switching point
• Wear and maintenance-free
• Smallest mounting dimensions
Fault monitoring
The electronics module SG 51 continuouslyMonitors via frequency evaluation the following criteria: • Strong corrosion or damage on the tuning fork • Loss of vibration • Line break to the piezo driveIf a malfunction is detected or in case of power failure, theelectronics takes on a defined switching condition, i.e. the
output transistor blocks (safe condition). • NPT- thread• Pipe screw fitting
Function principle Technical data
Tuning fork: 1.4435 (316L) Housing: 316L and plastic PEI Process seal: Klingerssil (not touched by medium) Process fittings: 1.4435 ( 316L) Process pressure: -1 to 64 bar (-100 to 6400 kPA) Process temperature: -40°C to +100°C Signal lamp (LED)Green: Density: 0.7 … 2.5 g/cm³ switch closed Viscosity: 0.1 … 10000 mPa s Red: switch open Red (flashing): Failure, switch open Model designation Basic modelProcess fittingElektronicsElektric power connectionG 3/4”G 1”253 V AC / DC55 V DCM 12x1DIN 43650DIN 43650QuickOn SG 51 XXS GBGACTMVQ
SG 51 is a level sensor with tuning fork for level detection. The tuning fork is piezoelectrically energized and vibrates at its mechanical resonance frequency. (of approx. 1200 Hz.) The piezos are fixed mechanically and therefore are not subject to temperature shock limitations. The frequency changes when the tuning fork is covered by the medium. This change is detected by the integrated oscillator and converted into a switching command. Typical applications are overfill and dry run protection.
Options
• Overflow protection as per WHG• Marine approval
• High temperature version
