The CDP-P is designed to control a flow-rate in water piping.

A pallet mounted perpendicular to the flow, actuates a changeover switch.

The threshold ranges listed are for water at 20 ° C with horizontal pipe.
Mounting could be on a vertical pipe with ascending flow; Then, threshold value will be greater than the one of table.
The pipe slope of a flowing down piping must be less than 40 %.