LEUZE LSSR 25B-S12 THROUGH-BEAM PHOTOELECTRIC SENSOR TRANSMITTER (PART NUMBER: 50108477)

DEEP PRODUCT OVERVIEW & SYSTEM ARCHITECTURE
The Leuze LSSR 25B-S12 (Order Part Number: 50108477) is a high-grade through-beam photoelectric sensing component belonging to the reliable 25B Series ecosystem engineered by the global automation leader Leuze electronic (Germany). This specialized device functions exclusively as the light emitter (Transmitter - TX) and acts as a mandatory hardware component within a through-beam photoelectric sensor configuration. Completely departing from traditional diffuse or retro-reflective sensors that integrate both the transmitting and receiving loops inside a single hardware casing, a through-beam array separates the optical cycle into two independent physical units positioned directly opposite each other. The LSSR 25B-S12 transmitter holds the operational responsibility of continuously projecting a highly stable light beam across the open gap, while a corresponding matching receiver unit handles signal capture and digital evaluation. Due to this independent layout design, the LSSR 25B-S12 delivers extraordinary tracking reliability over wide areas, completely eliminating optical tracking errors caused by product color variations or irregular target material profiles, offering the premier sensing solution for linear automated conveyors, multi-tier automated warehouses, and high-capacity packaging lines.

DIRECT THROUGH-BEAM PRINCIPLE & MATERIAL-INDEPENDENT TRACKING
The sensor system operates strictly on the direct through-beam principle. Once supplied with standard 10-30 VDC electrical power rail, the LSSR 25B-S12 transmitter continuously emits a visible red LED beam modulated at a wavelength of 620 nm in a crisp pulsed light pattern aimed straight at the opposing receiver lens window.
- Under normal, clear, and unobstructed conditions, the receiver continuously registers the full amplitude of the light beam energy, maintaining a steady logical system state.
- The precise moment any target object passes through the active optical path and blocks the direct beam, the light transmission cycle is broken. The receiver instantly detects this beam interruption and triggers its digital ON/OFF control output to notify the master PLC or automated processing network.
Because the light beam travels directly from the emitter array straight into the receiver without relying on target surface remission, scattering, or reflectivity coefficients, the system achieves absolute tracking stability regardless of target color, transparency, glossiness, or substrate texture. It seamlessly tracks challenging targets like matte black components, high-shine metal blanks, clear film layers, or dark shipping container cartons with zero signal jitter.

MASSIVE 20M RANGE & PULSED LIGHT AMBIENT SUPPRESSION
- Industrial Wide-Range Capacity: Securely delivers a guaranteed operational tracking distance spanning from 0 meters up to 20 meters, with a typical maximum sensing limit reaching 24 meters. This powerful performance index vastly exceeds the range of traditional diffuse reflection units, making it perfectly suited for cross-track conveyor monitoring, automated vehicle checkpoint lanes, and large pallet orientation check slots inside smart distribution hubs.
- High-Frequency Pulsed Light Technology: The beam projected from the red LED cluster is modulated at a fast internal clock frequency. This optical sync sequence empowers the corresponding receiver to completely isolate and reject foreign ambient illumination noise on the factory floor (such as high-output industrial fluorescent grids, overhead high-power LED assemblies, or sudden flashes of natural sunlight), securing flawless data streams under volatile lighting conditions.

ELECTRICAL TRANSMITTER PRINCIPLE & INDUSTRIAL M12 QUICK DISCONNECT
Because the LSSR 25B-S12 serves as a pure transmitter component, it does not incorporate digital switching transistor output channels (no NPN or PNP hardware leads are present inside the shell). Controls engineers require a simple positive and negative power interconnect scheme to engage the continuous pulsed beam; all signal evaluation logic and control output wiring reside exclusively on the matching receiver end. The internal microelectronics feature a stable initialization system delay of 300 ms, reaching steady-state beam output shortly after power-up. The electrical connection utilizes an industrial standard M12 male connector featuring a 4-pin layout with A-Coded mechanical alignment molded from premium engineering polymers, optimizing resistance against structural machinery shocks and streamlining line maintenance swap cycles.

MINIMALIST FOOTPRINT & SEVERE INDUSTRIAL WEATHER PROTECTION
- Compact PC-ABS Enclosure: The sensor body is molded from high-grade PC-ABS engineering polymer alloy, ensuring superior mechanical shock absorption, structural fatigue resistance, and durability under mild automated shop floor stresses. The optical lens window is crafted from high-transmittance optical PMMA polymer. Its streamlined geometric envelope measures only 15 × 38.9 × 28.7 mm with a micro net weight of 15 g, supporting rigid through-hole bolt fastening into tight machine frames. A single high-visibility power LED is integrated on the shell for instant maintenance diagnostics.
- Dual Washdown IP66 and IP67 Certification: Fully certified to resist fine dust ingress and defend against high-pressure water jets or temporary water submersion during routine line sanitation. Operating smoothly over a wide thermal spectrum ranging from cold-chain freezing levels of -30°C up to high-heat thresholds of +55°C, the Leuze LSSR 25B-S12 delivers long-term reliable service across automated distribution centers, food processing clean rooms, cold chain distribution systems, and complex assembly cells.

OPTICAL DATA & EMITTER PERFORMANCE
- Device Classification: Transmitter (TX) of a through-beam photoelectric sensor system
- Product Series Alignment: 25B Series
- Light Emitting Source: Red LED (Visible beam profile)
- Optical Wavelength: 620 nm
- Optical Modulator Pattern: High-frequency Pulsed Light (For maximum ambient noise immunity)
- Guaranteed Operating Range: 0 meters to 20 meters
- Maximum Typical Sensing Limit: 0 meters to 24 meters

ELECTRICAL DATA & SYSTEM TIMING
- Supply Operating Voltage: 10 ... 30 VDC (Includes integrated reverse polarity protection)
- Residual Voltage Ripple Allowed: 0 ... 15%
- Open-Circuit Current Consumption: ≤ 20 mA
- Initialization Startup Delay (Delay before availability): 300 ms
- Output Configuration: No switching outputs present (Control output logic resides exclusively on the matching Receiver unit)

CONNECTION INTERFACE & PLUG DETAILS
- Electrical Connection Type: M12 Standard Quick Disconnect Plug (Male Connector)
- Number of Contact Pins: 4-pin layout
- Mechanical Connector Alignment: A-Coded industrial specification
- Connector Shell Material: Specialized high-insulation engineering polymer (Plastic)
- Standard Power Rail Pin Assignment:
  + Pin 1: Positive Supply Input Rail (+24VDC)
  + Pin 3: Negative Supply Input Rail (0V / GND)
  + Pin 2: Not used / Open lead
  + Pin 4: Not used / Open lead

MECHANICAL PROPERTIES & MATERIAL COMPOSITION
- Physical Enclosure Dimensions (W × H × L): 15 mm × 38.9 mm × 28.7 mm
- Net Device Weight: 15 g
- Enclosure Substrate Material: Heavy-duty PC-ABS engineering plastic alloy (Signature Leuze Red/Black)
- Optical Window Lens Material: High-transmission technical grade PMMA plastic
- Fixing Assembly Method: Rigid through-hole structural bolt mounting
- On-Board Diagnostics: Integrated 1-beam high-visibility green power status LED

ENVIRONMENTAL RATING & COMPLIANCE
- Ingress Protection Rating: IP66 and IP67 (Completely dust-tight, heavy water jet resistant, and temporary water immersion proof)
- Electrical Safety Classification: Class III insulation
- Ambient Operating Temperature Spectrum: -30°C to +55°C
- Ambient Storage Temperature Spectrum: -30°C to +60°C
- Quality & System Standards: cULus certified, fully aligned with international IEC 60947-5-2 industrial automation standards.