FineTek SC Series Tuning Fork Level Switch

FineTek SC Series Tuning Fork Level Switch

Foam, coating, and turbulence throw off a lot of level switches — the FineTek SC Series tuning fork level switch isn’t one of them. It’s a robust point-level sensor for liquids that delivers dependable high and low level detection with no moving parts, no calibration, and minimal upkeep.

How It Works

An electronics-driven piezoelectric crystal vibrates the tuning fork at a set frequency, while a second crystal converts the transmitted vibration back into an electrical signal. When liquid surrounds the forks, that vibration is damped and the frequency shifts — a change the electronics pick up to switch the output. Once the forks clear the liquid, vibration returns to normal and the output reverts automatically.

Key Features

  • Frequency-shift detection — unaffected by foam, coating, or turbulence
  • No moving parts and no on-site calibration required
  • Compact and hygienic process connections available
  • Selectable fail-safe high/low switching

Applications

  • High and low level alarm in tanks and vessels
  • Pump dry-run protection and overfill prevention
  • Pipeline full/empty detection

Industries Served

  • Chemical and petrochemical
  • Water and wastewater treatment
  • Food, beverage, and pharmaceutical
  • Power and general industry
Working PrinciplePiezoelectric crystal-driven tuning fork; vibration dampens on media contact, triggering the switch
ApplicationMax/min level detection in tanks, silos, hoppers
Detecting MaterialSolids, powders, and liquids
Vibration Frequency350-370 Hz (standard models)
Minimum Material DensitySolids ≥0.07 g/cm³; Liquids ≥0.7 g/cm³
Signal Output / Relay RatingSPDT relay 5A/250Vac (standard); SSR MOSFET 400mA/60Vac/Vdc; 3-wire NPN/PNP 350mA/55Vdc
Power Supply20-250 Vac/Vdc, 50/60 Hz (relay types); 12-55 Vdc, 3-wire (transistor types)
Power Consumption10 VA (relay types)
Process Temperature-40°C to 130°C (standard models)
Process PressureUp to 40 bar (-1 to 600 PSI)
Protection RatingIP65 / IP66 / IP67 (varies by model/connector type)
Housing MaterialAluminum
Fork/Probe MaterialSUS304 / SUS316 / SUS316L (optional ETFE or PTFE coating)
Process Connection1″PT or 1/2″NPT
CertificationNEPSI Ex d IIC T3-T6 / Ex ia IIC T3-T6 Ga; ATEX II 2G/2D; IECEx

Download FineTek SC Series Tuning Fork Level Switch information here

Datasheet: Finetek_SC-Tuning-Fork-Level-Switch
Manual:

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