IEEE / ANSI · P/I

ANSI/IEEE pressure/current converter symbol

IEEE-library pressure-to-current converter form representing a transducer that turns process pressure into a loop current.

In plain English

What does ANSI/IEEE pressure/current converter mean?

The pressure/current converter represents a device that turns a measured quantity into a signal that measures pressure and produces a proportional electrical signal, typically a 4-20 mA loop. On control and protection schematics it appears where transformer, compressor or hydraulic pressure is passed to a PLC, relay or indicator.

A simple example

The block does not tell you the pressure range, whether the output is two-wire loop-powered or four-wire, or whether the measurement is gauge, absolute or differential. Those details govern the wiring and the scaling at the receiving input.

Identify the device and formRead the connections and stateCheck the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

What the drawings help you do

Identify whether the loop is powered by the receiver or the device that turns a measured quantity into a signal. Check scaling of the output current to pressure range. A pressure/current converter gives a continuous signal; a pressure switch gives only a contact change at a set point.

This particular reference

IEEE-library pressure-to-current converter form representing a device that turns a measured quantity into a signal that turns process pressure into a loop current. A pressure/current converter gives a continuous signal; a pressure switch gives only a contact change at a set point.

Winding
A coil of conductor inside an electrical machine or transformer.
Coil
A wound conductor that can produce a magnetic field when energised.
Terminal
An identified point where a conductor connects.

Read the source: Autodesk IEEE Symbol Preview — Instrumentation and Sensors · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams

IEEE / ANSI · Autodesk IEEE-oriented Instrumentation and Sensors form: Pressure/Current Converter

Autodesk publishes this block under its IEEE Symbol Preview. The counterpart is the matching functional concept in the library; no equivalence of every detailed standard graphic is asserted.

Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.

Schematic · P/IANSI/IEEE pressure/current converter symbol: original educational illustration
Original educational illustrationNot to scale · See source and graphic notes

What it represents

The pressure/current converter represents a transducer that measures pressure and produces a proportional electrical signal, typically a 4-20 mA loop. On control and protection schematics it appears where transformer, compressor or hydraulic pressure is passed to a PLC, relay or indicator.

The block does not tell you the pressure range, whether the output is two-wire loop-powered or four-wire, or whether the measurement is gauge, absolute or differential. Those details govern the wiring and the scaling at the receiving input.

How to read it

  • Identify whether the loop is powered by the receiver or the transducer.
  • Check scaling of the output current to pressure range.

Information to show or reference

  • State pressure range and type
  • Show loop power source
  • Reference receiving input

A distinction that matters

A pressure/current converter gives a continuous signal; a pressure switch gives only a contact change at a set point.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

Autodesk IEEE Symbol Preview — Instrumentation and Sensors

Public IEEE-oriented Instrumentation and Sensors preview listing the Pressure/Current Converter block and its vendor identifier.

Autodesk · Public reference checked 14 October 2026 · Link only

IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams

Graphic-symbol standards context and official status; not a source of reproduced artwork.

IEEE Standards Association · Public reference checked 13 October 2026 · Link only

About this graphic

This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.

SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.

Entry JSON · Entry Markdown · Last editorial update: 28 October 2026

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