The Honeywell HOA088X/089X series transmissive sensors are designed for reliable position sensing in a variety of industrial applications. These sensors consist of an infrared emitting diode facing an NPN silicon phototransistor housed in a thermoplastic enclosure. The phototransistor switches when an opaque object interrupts the beam between the emitter and detector. Available options include mounting configurations, detector aperture sizes, and housing materials (IR transmissive or opaque), allowing for customization to meet specific application requirements. The HOA088X series utilizes an IR transmissive polysulfone housing, while the HOA089X series employs an opaque polysulfone housing for maximum ambient light rejection. These sensors are suitable for applications requiring precise position resolution and are often used in automated systems, security devices, and industrial controls.