Photoelectric Luminescence sensors LDLU + LDLV Series

Datasensing LDLU + LDLV Series

The LDLU + LDLV Series provides a specialized range of luminescence scanners engineered for fluorescent-target detection, in two compact industrial formats (M18 and M30). With models offering dual emission (white/UV), local or remote Teach-in, selectable Light-On/Dark-On outputs, and ultra-fast switching, this series delivers high-precision detection, rapid response, and industrial-grade performance in challenging automation scenarios.

Design & Functionality

• The series features two form-factors: LDLU in M18 plastic housing, and LDLV in M30 metal/nickel-plated brass housing. The LDLU is ideal for compact installation and the LDLV offers higher mechanical robustness for harsh environments. 
• Emission includes white-light and ultraviolet (UV) LED sources, enabling detection of both fluorescent-marked targets and standard contrast tasks.
• Self-Teach-in: Users can carry out Teach-in either locally (button) or remotely, facilitating quick commissioning and adaptability to varying target or background conditions. 
• Selectable output mode: Light-On or Dark-On logic selectable, NPN or PNP versions available, and output LO/DO configurable — delivering installation flexibility. 
• Rapid performance: For M18 versions, nominal sensing distances include ~12 mm (with STF-12 focalizer) or ~25 mm (with SFT-25 focalizer); switching frequency up to 10 kHz and response time as low as 50 µs. 
• For M30 versions (LDLV), sensing distance ~30 mm, switching frequency ~400 Hz and response time ~1.1 ms. 
• Protection rating IP65, housing materials as per variant, complete electrical protections (reverse-polarity, short-circuit auto-reset, transient suppression) ensure industrial reliability. 

Total Crossed Beams

(In this luminescence-sensor context, the “total crossed beams” concept refers to ensuring a stable and reliable detection signal path across the target area rather than literal optical beams.)

• The LDLU + LDLV Series ensures a consistent and stable detection field, even when detecting small fluorescent marks or under variable background light, leading to fewer missed detections and fewer false alarms.
• Installation is simplified via built-in Teach-in functionality and sensitivity adjustment, reducing setup time and improving reliability in high-throughput operations.

Beam Pitch Options

(Here interpreted as selectable sensing-distance/focal-variants rather than literal beam spacing.)

• M18 LDLU variant: nominal sensing distances ~12 mm (with STF-12) or ~25 mm (with SFT-25) for fluorescent targets white-Kodak 90% 100 × 100 mm. 
• M30 LDLV variant: nominal sensing ~30 mm for fluorescent targets. 
• These variant options allow you to select the model based on target size, mounting clearance, reflectivity or marking method — offering design flexibility.

Intrinsic Synchronism

• The electronics are integrated and self-contained — no external synchronising wiring is required — simplifying installation in compact assemblies.
• Startup delay (“time before availability”) is typically ≤ 200 ms, enabling quick readiness. 

Operational Advantages

• High-precision fluorescent detection: With UV/white-light emission and ultra-fast response times down to 50 µs, the LDLU + LDLV Series is optimized for detection of fluorescent marks, inks, printed codes and treated surfaces.
• Compact, robust mounting options: The M18 plastic format (LDLU) suits tight spaces; the M30 metal format (LDLV) suits harsher environments and larger installation scenarios.
• Selectable logic & versatile setup: Light/Dark selected, NPN/PNP versions, sensitivity adjustment and Teach-in remote/local allow the sensor to adapt to varied automation systems.
• Industrially protected: Featuring IP65 rating, full electrical protections, high immunity to ambient light (3000 lux incandescent / 10000 lux sunlight in M18 version) makes the sensor reliable even in harsh lighting conditions. 
• Applications: Ideal for printed-mark detection, fluorescent tag scanning, quality inspection in packaging, labeling verification, pharmaceutical marking, automotive part marking and any manufacturing environment where fluorescent/treated target detection, fast response, compact housing and industrial reliability are required.