Dwyer Series 401 Magnetic Liquid Level Controls are designed to provide reliable and precise liquid level detection in various industrial and commercial applications. These controls utilize magnetically actuated switch mechanisms operated by a float moving within a nonmagnetic tube. The armature tube and switch structures allow for stacking multiple switch mechanisms on the tube, each responding to different float levels for customized two-stage operation.

Key features include:

• Adjustable high and low operating levels
• Adjustable operating levels with high or low level alarm or trip
• Adjustable differential