T20 are single stage float switches with narrow differential destined for high or low liquid level alarm in storage or process vessels.
T21 are dual stage float switches with narrow differential destined for high and low liquid level alarm in storage or process vessels where wide space between level alarms is required.
Operating principle is based on the buoyancy force of a process liquid which acts on the float causing the float to move with the liquid surface. The movement of the float moves an attraction sleeve into the field of the switch magnet, pulling the magnet toward the sleeve and actuating the switch.
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Float switches for cryogenic applicationsdetails
Float switches perfect for applications where high temperature is applieddetails
Liquid level and interface float switches with integrated float cages.details
Float switches dedicated for vertical mountingdetails
PL 87-805 Wloclawek