Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

PS NO

IEEE / ANSI

ANSI/IEEE pressure switch no symbol

The pressure-operated NO form links a contact state to a documented pressure condition. The process direction and reset differential must be supplied separately because an open reference contact does not establish a high- or low-pressure threshold.

Drawing use

Schematic

Application

Control circuits

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Autodesk IEEE-oriented Pressure and Temperature Switches functional form. Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

Pressure process action and NO contact reference state are different pieces of information.

Full referenceAdd to legend

PS NO

Symbols

Pressure switch NO

A pressure-operated NO switch closes when its documented pressure condition actuates the mechanism. Increasing or decreasing pressure behaviour must be identified rather than inferred from NO.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

A distinction that matters

NO is the unactuated contact state; high-pressure or low-pressure describes the process condition.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.