B-Line 1551E-8507 Enhanced 50 Series Photoelectric Sensor

Both. The Enhanced 50 Series 1551E-8507 has NPN and PNP open collector outputs, so it drops into either a sinking or a sourcing input card without a separate interface relay. Load current is limited to 250 mA maximum.

It's a fiber optic amplifier, not a stand-alone sensing head. The 1551E-8507 is a fiberoptic sensor using a visible red beam, so you have to order the fiber optic cable assemblies (through-beam pair or bifurcated diffuse) separately to suit the target. Nothing is sensed until a fiber is fitted.

Yes. The 1551E-8507 is rated IP67 and IP69K, so it withstands dust, temporary immersion and high pressure, high temperature washdown typical of food and beverage lines. The housing is fiberglass reinforced plastic rather than metal, which suits chemical washdown environments.

Termination is a 4 pin mini connector, so it's a quick-disconnect unit rather than a pigtail. You supply the mating 4 pin mini cordset in the length you need; there is no attached cable on the sensor itself.

Operating range is -13 to 131 degrees F (-25 to 55 degrees C), so an unheated warehouse or a cold dock is fine. It is not rated for a freezer blast area below -13 F or for hot process zones above 131 F.

Three LEDs do the setup work: yellow shows power on, green shows output status, and red flags marginal gain. If the red indicator lights during commissioning the light signal is too weak to trust, so reposition the fiber, clean the lens, or adjust sensitivity until it goes out. That marginal gain indicator is how you avoid nuisance trips later.

Yes. The 1551E-8507 includes on-board time delay, so short target presence can be stretched or output chatter suppressed at the sensor instead of adding a timing relay in the panel. Useful when a PLC scan would otherwise miss a fast-moving part.

Pick the fiber optic route when the sensing point is too small, too hot, too tight, or too wet for a sensor body. The 1551E-8507 keeps the electronics remote and sends only a visible red beam down the fiber, so the amplifier sits in a safe spot while the fiber tip goes into the machine. If you have room to mount a complete sensor at the target and no washdown or space constraint, a self-contained photoelectric eye is simpler because it needs no fiber assembly. Note this amplifier is itself IP67 and IP69K rated, so it can also live in a wet area.

Order by manufacturer part number 1551E-8507, B-Line Enhanced 50 Series, a photoelectric switch in fiber optic configuration. There is one build of this model, so there are no finish, voltage, or output suffixes to specify.