Tuning fork level switch, no probe extension.

No Calibration Required.; Vibrating Fork Design: Great for low bulk density and low dielectric constant products. Will detect products down to 1.8 lb/ft3 (30 g/l).; Universal Power Supply: One model works with 90 to 265 VAC and 24 VDC.; Adjustable Sensitivity: Can be set to ignore lighter bulk density products and only detect heavier products, such as sand in water.; Status Indication: External LED switch indicator, and internal indicators for normal and alarm status.; Failsafe Setting: Output switch can be set for Normally Open or Normally Closed condition on loss of power.; Time Delay: Prevent false alarms from material surges.; No Maintenance Required.; Any Position Mounting: Available with factory built extensions for mounting on the top of the storage vessel.