B-Line 1250E-8507 Enhanced 50 Series Photoelectric Sensor

The 1250E-8507 Enhanced 50 Series sensor operates in through-beam mode, meaning the emitter and receiver are separate housings facing each other across the detection zone. A single unit is one half of that pair, so a through-beam application needs the matching opposite half aimed at it. Through-beam is the mode to use when you need the longest sensing range and the most reliable detection of opaque targets regardless of color or surface finish; if you only have access to one side of the opening, a reflective or diffuse-mode sensor is the type to look at instead.

It runs on 10 to 40 Vdc, so it drops onto a standard 24 Vdc control supply without a separate power module. Switching output is rated 250 mA at 40 Vdc, with a 250 mA maximum dc current, which is enough to drive a relay coil or a PLC input directly but not a motor or solenoid load without an interposing relay.

Either. The 1250E-8507 provides both NPN and PNP open collector outputs, so it works with a sinking input card or a sourcing one without ordering a different part number. That is useful on mixed sites where some panels are wired NPN and others PNP, since one sensor can be stocked for both.

Termination is a 4 pin mini connector rather than a fixed pigtail, so the sensor unplugs from its cordset for replacement without reopening the panel terminations. You will need a mating 4 pin mini cordset in the length your run requires, since the sensor body itself is the connector end.

Yes. The 1250E-8507 carries IP67 and IP69K environmental ratings, IP69K being the high pressure, high temperature washdown rating, and the housing is fiberglass reinforced plastic rather than painted metal. That combination suits food processing and other areas that get hosed down on a shift schedule.

Operating range is -13 to 131 degrees F (-25 to 55 degrees C), so an unheated warehouse, a loading dock, or a cooler is within spec. It is not rated for a blast freezer at the low end or for a hot process area above 131 degrees F.

Three LEDs do the diagnosis. Yellow shows power on, green shows output status, and red indicates marginal gain, meaning the beam is making it across but with little margin. If you see red during commissioning, re-aim or clean the lenses before you leave, because a marginal signal is the one that starts nuisance-tripping once dust builds up.

A time delay function is built into the sensor, so short dropouts or a need to hold the output on briefly can be handled at the sensor rather than adding a timer relay in the panel. That saves a DIN rail position and a set of terminations on small control builds.

Built-in protection covers reverse polarity, short circuit, and overload. In practice that means a swapped brown and blue at the cordset will not destroy the unit, and a pinched output wire shorting to the frame will not take the sensor out with it.

Order it as B-Line 1250E-8507, the Enhanced 50 Series photoelectric sensor. That single model designation covers the part, there are no finish or length options to specify, so the only other line items you need are the mating 4 pin mini cordset and your mounting bracket.