The Leuze LE25C.1/4P-M12 (Part Number: 50139697) is a high-performance throughbeam photoelectric sensor receiver belonging to Leuze electronic's advanced Series 25C (Germany). Operating exclusively as a high-fidelity optical receiver module, it pairs seamlessly with a matching Series 25C transmitter (LS25C / LS25C.1) to create an ultra-reliable, long-range optical light barrier spanning up to 30 meters.

KEY PRODUCT FEATURES AND OPERATIONAL ADVANTAGES:
1. Opposed Throughbeam Principle – 100% Target Surface Independence:
Because the optical beam is transmitted directly across an unobstructed path into the receiver lens, the detection is completely independent of target color, high-gloss reflectivity, surface texture, or entry angle. Any opaque object interrupting the optical beam is detected instantaneously with absolute precision.
2. Extended Operating Range Up to 30 Meters:
Features a guaranteed operating range of 25 meters and an ultimate limit of 30 meters. This high optical excess gain ensures uninterrupted operational performance even in harsh industrial environments with ambient dust, oil mist, or dirt accumulation on the optical lenses.
3. Integrated 270° Sensitivity Potentiometer (.1 Version):
The specialized ".1" designation includes a rear-mounted 270° rotary potentiometer, allowing field engineers to calibrate receiver sensitivity precisely for detecting smaller parts or accommodating specific optical transmission conditions.
4. High-Speed Dual PNP Antivalent Outputs (/4P):
Equipped with two complementary PNP transistor outputs (1x Light-switching and 1x Dark-switching). With an ultra-fast switching frequency of 1,500 Hz (1.5 kHz) and a 0.33 ms response time, it easily handles high-speed automated sorting and real-time conveyor tracking.
5. Integrated Solid M12 4-Pin Connector (-M12):
Features a built-in 4-pin M12 male connector (A-coded) on the housing, eliminating messy wiring, reducing mechanical cable stress, and enabling rapid plug-and-play installation during routine maintenance.
6. Heavy-Duty Industrial Durability – IP67, IP69K & ECOLAB Certified:
Constructed with durable ABS engineering plastics reinforced with M4 metal threaded inserts (tightening torque: 1.4 N·m) and a scratch-resistant PMMA lens window. Fully rated for IP66, IP67, and IP69K washdown environments, along with ECOLAB certification for full chemical resistance against aggressive cleaning agents.

TYPICAL INDUSTRIAL APPLICATIONS:
• Automated Storage & Retrieval Systems (AS/RS): Pallet presence verification, heavy cargo tracking, and stacker crane positioning on automated storage racks.
• Secondary Packaging & Conveying: Detection of corrugated cardboard boxes, wooden crates, and bundles on high-throughput main lines.
• Heavy Industry & Metal Fabrication: Detection of sheet metals, structural steel beams, and heavy castings passing through safety clearance gates.
• Food, Beverage & Pharmaceutical Processing: Reliable operation across packaging and washdown zones subject to frequent high-pressure CIP sanitization.

• Manufacturer: Leuze electronic
• Part Number / Model: LE25C.1/4P-M12
• Order Number (Part no.): 50139697
• Series: Series 25C (Cubic design)
• Brand Origin: Germany
• Device Type: Throughbeam photoelectric sensor receiver
• Compatible Transmitter: LS25C / LS25C.1 (Throughbeam transmitter)
• Guaranteed Operating Range: 0 ... 25 m (0 – 25,000 mm)
• Operating Range Limit: 0 ... 30 m (0 – 30,000 mm)
• Operational Control: 270° rotary potentiometer
• Function of Control: Sensitivity adjustment
• Supply Voltage (UB): 10 ... 30 V DC (Residual ripple 0 ... 15%)
• Open-Circuit Current: 0 ... 15 mA
• Digital Switching Outputs: 2 independent outputs (Antivalent)
• Switching Output 1: Transistor PNP, Light switching
• Switching Output 2: Transistor PNP, Dark switching
• Max Switching Current: 100 mA per output
• Max Switching Frequency: 1,500 Hz (1.5 kHz)
• Response Time: 0.33 ms
• Readiness Delay: 300 ms
• Protective Circuits: Polarity reversal protection, short-circuit protection
• Status Indicators: All-round visible LEDs (Power and Switching Status)
• Connection: Integrated M12 connector, 4-pin male (A-coded)
• Housing Dimensions (W x H x L): 15 mm x 42.7 mm x 30 mm
• Net Weight: 22 g
• Mounting Type: Through-hole mounting with integrated M4 thread (Recommended torque: 1.4 N·m)
• Housing Material: ABS Plastic (Color: Red RAL 3000)
• Lens Cover Material: Optical PMMA Plastic
• Ingress Protection: IP 66, IP 67, IP 69K (Resistant to high-pressure washdown)
• Protection Class: Class III
• Chemical Resistance Certification: ECOLAB
• Operating Temperature Range: -40 °C ... +60 °C
• Storage Temperature Range: -40 °C ... +70 °C
• Standards & Certifications: IEC 60947-5-2, cULus Listed