Tuning Fork Level Switches

June 3, 2020

Explosion-Proof Tuning Fork Level Switches prevent overfill (high) or dry run (low) conditions in liquids, fine-grained solids, granular plastics, gravel, and powders. The intuitive LEDs located inside the housing provide a clear indication of the Tuning Fork's operational state without requiring the unit to be pulled from service. The level switches can be ordered either as HTF1740 with a customer-specified insertion length of 5 to 10 in. for side-mounted applications or the HTF1741 with a customer-specified insertion length of 11 to 118 in. for top-mounted applications.

  • 5 to 118 in. length option in 1-in. increments
  • No calibration required
  • Selectable alarm high (overfill) or low (dry run) option
  • Sensitivity adjustment option
  • LED indicators for power and operational state
  • Signal Output: Relay SPDT (NO and NC) or SSR MOSFET (PNP/NPN)
  • Unaffected by turbulence, flow, foam/bubbles, vibration, liquid properties, product variations, coating products, and solids content
  • Direct-mount Magnetic Switch Kit available as an accessory