Conveyors, packaging lines and doorways with shiny products need a photo eye that won't be fooled by reflections. The HTM Sensors RP74-L4870D-CY6Q4UE-PF is a polarized retro-reflective photoelectric sensor with a 4.87 m range, a red 660 nm LED and both NPN and PNP outputs. It runs on 10-40 V DC, lets you select light-on or dark-on, and connects with a 4-pin M12 quick disconnect.
Why controls techs pick it
- Polarizing filter helps ignore glossy targets that fool standard retro-reflective eyes.
- Both NPN and PNP outputs, so one part works with sinking or sourcing PLC inputs.
- Light-on or dark-on selectable by switch.
- IP67 glass-fibre reinforced plastic housing for plant floors.
- Short-circuit and reverse-polarity protected; margin LED helps with alignment.
Specifications
| Spec |
Detail |
| Brand |
HTM Sensors (RP74 Series) |
| Model |
RP74-L4870D-CY6Q4UE-PF |
| Sensing mode / range |
Polarized retro-reflective / 4.87 m |
| Light source |
Red LED, 660 nm |
| Supply |
10-40 V DC (ripple ≤10%) |
| Output / load |
1 NPN + 1 PNP transistor / 250 mA max |
| Operation |
Light-on or dark-on, switch selectable |
| Indicators |
Power yellow, output green, margin red |
| Connection |
4-pin M12 male QD |
| Housing / rating |
Glass-fibre reinforced plastic, acrylic lens / IP67 |
| Operating temperature |
-25°C to 55°C |
Pro tip from the counter
A polarized retro-reflective eye only works properly with a corner-cube prismatic reflector, and no reflector is listed with this sensor. Order one with it, and don't substitute plain reflective tape, because the polarizing filter is designed to reject that kind of mirror-like reflection.
Best for: conveyor and packaging lines, shiny or shrink-wrapped product detection, overhead door and gate detection, OEM machine retrofits
Downloads: Data sheet (PDF)
Ships across Canada from Vaughan, ON. For maintenance spares or OEM volumes, request a quote or call (905) 553-7171.