| Pi Tau Sigma | |
|---|---|
| ΠΤΣ | |
 | |
| Founded | March 16, 1915 University of Illinois Urbana-Champaign |
| Type | Honor Society |
| Affiliation | ACHS |
| Status | Active |
| Emphasis | Mechanical engineering |
| Scope | International |
| Member badge |  |
| Colors | Murrey and Azure |
| Symbol | lozenge sable, torch, steel "H" section, Carnot cycle |
| Flower | White Rose |
| Publication | The Condenser The Story of Pi Tau Sigma |
| Chapters | 182 |
| Headquarters | United States |
| Website | pitausigma |
Pi Tau Sigma (ΠΤΣ) is an international honor society in the field of mechanical engineering, with most chapters established in the United States. It honors mechanical engineering students who have exemplified the "principles of scholarship, character and service..." in the mechanical engineering profession.