The IDEC SA1U-T50M is a versatile Through Beam switch with a relay output and an extensive sensing range of up to 50 meters. It supports multiple sensing methods including through beam, polarized retro-reflective, diffuse, and background suppression. The switch features an adjustable time delay from 0.1 to 5 seconds for tailored operation and interference prevention for close proximity mounting of two units. Its spring-up terminal block structure simplifies wiring efforts, enhancing installation efficiency.