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Free |work| Hmi Graphics Library Direct

Several companies and open-source communities provide free HMI (Human-Machine Interface) graphics libraries

to help engineers build professional SCADA and PLC dashboards without starting from scratch. These resources typically include industrial symbols like pumps, valves, tanks, and motors in formats such as SVG, PNG, and GIF. Top Free HMI Graphics Libraries Opto 22 SVG & GIF Library : A comprehensive collection of editable SVGs

, product images, and animated GIFs specifically designed for control dashboards. These are accessible via the Opto 22 Image Library Open Automation Software (OAS) : Offers a free download of over 5,000 industrial symbols

, including HVAC, manufacturing conveyors, and chemical tanks. You can request the link through the OAS Free HMI Graphics page Siemens HMI Template Suite : Provides expertly designed templates and objects free hmi graphics library

for TIA Portal to speed up development and ensure a modern look for SIMATIC HMIs. Haiwell Standard Image Library : Includes specific icon packs for transformers, valves, reactors, and pumps , regularly updated as recently as April 2025. SVGHMI.pro : Features a modern SVG industrial widget library

with dedicated symbol packs for motors and other common hardware. General Purpose Icon & Vector Sites

If you need modern UI elements rather than specific industrial hardware, these sites offer high-quality HMI-compatible graphics: Hmi Vector Art, Icons, and Graphics for Free Download Download the SVG file

How to Integrate Free Graphics into Your SCADA

Finding a "free hmi graphics library" is step one. Step two is making it work without breaking your runtime performance.

The XML/SVG Workflow: Most modern SCADA systems (Ignition, VTScada, WinCC Unified) support SVG natively.

  1. Download the SVG file.
  2. Open in Inkscape (Free vector editor). Strip out metadata to reduce file size.
  3. Bind dynamic properties. Change the fill color based on PLC tags (e.g., Green = Running, Red = Fault).
  4. Create a "Master Symbol." Import the pump SVG once. Create a faceplate that pops up when clicked.

Pro Tip: Free libraries rarely come with tag databases. You will need to manually alias your PLC addresses to the graphic's animation properties. Pro Tip: Free libraries rarely come with tag databases

4. Notable Free HMI Graphics Libraries

1. Executive Summary

Developing modern Human-Machine Interfaces (HMIs) for industrial panels, embedded devices, or SCADA systems often requires high-quality visual assets (widgets, gauges, buttons, trends). Commercial libraries can be costly and restrictive. This report identifies and evaluates free (open-source or freemium) HMI graphics libraries to reduce development time, improve UI/UX, and maintain cost efficiency. Key findings indicate that Qt’s built-in assets (with open-source license), FOSS SVG icon sets, and specialized SCADA libraries offer viable, production-ready solutions.

4.5. Web HMI – Free Graphics (for Web-based HMIs)

  • Apache ECharts – Apache 2.0. Not an HMI library, but excellent real-time gauges and trend lines.
  • Grafana (dashboard UI) – AGPL. Re-usable panels can be styled as HMI.
  • SVG Gauges (open-source) – MIT. Compact round gauges for web HMI via HTML/CSS/JS.

Example pipeline (Python + PySide6):

pip install PySide6
# Use Qt SVG module to load free industrial icons
# Use QPropertyAnimation for dynamic HMI behavior
# Style buttons with QSS (e.g., green start, red stop)

1. SVG-Edit HMI Symbols (Open Source)

  • Format: SVG, PNG
  • License: CC0 / Public Domain
  • Best for: Web-based HMI, Node-RED Dashboard, Grafana
  • Highlights: Fully scalable vector graphics; easy to color-change via CSS. Includes 200+ industrial objects.

Noun Project

  • Type: Icons.
  • License: Creative Commons (requires attribution) or Paid (Royalty-free).
  • Usage: An immense library of icons for every conceivable industrial application (valves, pumps, engines, safety warnings).

6. How to Build a Custom Free HMI Graphics Pipeline

Since truly complete and free off-the-shelf HMI libraries are rare, the most practical approach combines:

  1. Base framework – Qt for C++, or Python + PySide6 (LGPL), or Web HMI (React + SVG)
  2. Free icon set – Material Symbols + custom industrial SVG from sources like “FreeCAD symbols” or “Copper”
  3. Custom gauge generator – Use open-source QML Canvas or HTML Canvas drawing routines (no asset needed)
  4. Theme engine – CSS/QSS or SCSS variables to emulate Siemens or Allen‑Bradley look
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