Structural composition

1. Main measuring chamber (wetted standpipe)

2. Magnetic float (embedded permanent magnet inside measuring chamber)

3. Red-and-white bi-color magnetic flip indicator with graduated scale

4. Upper & lower connecting flanges (interfacing with steeping tank)

5. Drain valve.

Optional accessories: high-/low-level magnetic switches 4–20mA remote transmitterWorking principleOperates on communicating-vessel principle.

Buoyancy and magnetic coupling.

Main standpipe hydraulically connects to steeping tank so internal liquid level matches tank level. Magnetic float rises and falls with liquid variation.

Built-in permanent magnet penetrates pipe wall and toggles external bi-color flip plates: red for liquid phase.

White for gas phase. Boundary between red-white zones denotes actual liquid height. Fitted transmitter converts level signal into 4–20mA analog output for remote DCS/PLC monitoring.

Magnetic switches trigger overflow alarm and low-level pump-protection interlock.

Operating conditions and material requirements (corn steeping tank).

Medium: Sulfurous acid steep liquor with minor corn-protein suspended solids, mildly corrosive.

Operating temperature: 48–52℃.

Pressure: Atmospheric pressure. Wetted standpipe & float: 316L stainless steel. Long-term 304 deployment is not recommended.

Mounting: Side-flange installation; segmented assemblies available for large tanks. Signal configuration: Local visual indication + 4–20mA remote transmission + high/low level alarm switchesTechnical 1. Clear local readout with no external power supply required

2. Fully encapsulated measuring elements: only inner standpipe touches process medium.

Flip indicators stay non-wetted and resist fouling

3. Dual function: on-site visual check plus automated remote control

4. Zero mechanical wearing parts.

Robust for humid corrosive starch-plant environments

5. Bottom drain port for periodic flushing of protein residues and fine sediments.