Injection molding and die casting require precise, repeatable position feedback under heat, vibration, and high cycle rates. Flange-mounted linear displacement sensors are widely applied because their compact, robust design simplifies installation on tight machine structures. In injection molding, these sensors monitor mold opening and closing, clamp position, ejector stroke, and core movement. Accurate feedback helps prevent mold damage, shorten setup time, and maintain stable cycle times. They also support closed-loop control for mold protection, part ejection, and automated handling. In die casting, they support shot position monitoring, die height adjustment, ejection control, and gate or slide positioning despite metal splash, thermal load, and strong vibration. The flange mount improves mechanical alignment and enables quick replacement during maintenance. For reliable performance, users should match stroke length, resolution, repeatability, IP rating, temperature resistance, and output signal to the machine environment. Proper shielding, grounding, and cable routing reduce electromagnetic interference and extend sensor life. Sensors with rugged housings and sealed connectors are preferred for washdown, dust, and metal splash exposure. Stable mounting is essential. With continuous linear feedback, manufacturers gain better process control, lower scrap, faster changeovers, and higher equipment uptime. Flange-mounted sensors therefore remain a practical choice for demanding injection molding and die casting automation.