SS7-35B by Danaher

The SS7-35B is a photoelectric sensing array produced by Danaher within the Timers and Controllers series. Deployed across guarded entry points or conveyor zones, the device forms a curtain of infrared beams that are interrupted when an object passes, supplying a discrete signal to machine logic for stop, eject, or count functions in industrial automation. Its compact profile and factory-aligned optics simplify integration beside material-handling equipment.

Each channel projects a beam across a fixed gap so resolution and field length can be predicted. The array contains 47 emitter and receiver pairs, and the 0.75-inch beam spacing allows it to detect moderately sized cartons or totes. Objects as small as 1.25 inches across will reliably interrupt the array at any point along the span because of the uniform sensing envelope. With a maximum sensing reach of 45 feet, the heads can be mounted on opposite sides of wide conveyor lanes without supplemental mirrors. A 23-millisecond response time keeps the delay between a beam interruption and the controller output minimal, supporting medium-speed indexing lines. The sensing action uses a through-beam configuration that concentrates energy on the receiver for better immunity to ambient light.

The emitter diodes radiate at a peak wavelength of 880 nanometers, placing the signal in the near-infrared band where common lighting has limited influence. Both bars use cold-rolled steel housings with 14-gauge walls, and their surfaces are protected by an epoxy powder coating that resists scratches and oils found near packaging machinery. The metal enclosures increase torsional rigidity, helping the optical alignment remain stable during vibration or repeated washdowns. Rear-panel threads accept slotted brackets that provide clearance around machine guarding while maintaining a grounding path through the sheet metal. The rigid housings also protect the aligned emitter and receiver components from incidental contact during normal conveyor operation.