Liquid Level Control Selection Guide

Liquid Level Control Selection Guide

Single-Point Control

Single-point control

• Common application: Keep tank from overflowing or running dry.
• Compatible sensor types: Float, capacitance, optical, proximity, tuning fork, ultrasonic
• How it works: Each time the liquid reaches a critical level, the sensor turns on a pump or opens a valve to prevent the tank from overflowing/running dry.

Dual-Point Control

• Common application: Keep tank filled between two critical points.
• Compatible sensor types: Same as for single-point control (above).
• How it works: Install sensors at two critical points. If liquid falls below the lower sensor, the detector activates a pump until liquid reaches the upper sensor.

Continuous-Level Control

Continuous-level control

• Common application: Control level at all points and times, possibly activating a pump, valve, or alarm.
• Compatible sensor types: Symprobe™, Cricket™, ultrasonic, radar wave
• How it works: Continuous-level sensors have a continuous analog output that is proportional to the level at all times. Level may be recorded with an external device.

Leak Detection

Leak detection

• Common application: Detect leak in a pipe, possibly activating a pump, valve, or alarm.
• Compatible sensor types: Optical, proximity
• How it works: Install one or more sensors around a container or pipe. If the sensor detects liquid, it activates alarms or pump systems.