The Doweston Tuning Fork Level Switch utilizes a vibrating fork principle to detect the presence or absence of material at a specific point. When the fork is immersed in the medium (liquid or bulk solid), its vibration frequency changes, triggering a switch signal. This robust technology is unaffected by flow, turbulence, bubbles, pressure, or temperature, making it exceptionally reliable for pump control, dry-run protection, and high/low-level alarms in a wide range of applications.