The Leuze HT5B/4 (Global Part Number: 50148002) diffuse reflection sensor with background suppression is a miniature high-precision optoelectronic device belonging to the innovative Series 5B engineered by Leuze (Germany) – a world-leading manufacturer of smart sensor systems and optical automation safety. Designed specifically to master demanding industrial detection challenges within constrained mounting spaces, this sensor provides exceptional optical precision, powerful background rejection, and outstanding integration flexibility across automated production lines.

At the heart of the Leuze HT5B/4 is an optimized focused beam geometry with a fixed 200 mm focal distance and a 645 nm pulsed visible red LED light source. Operating on advanced background suppression (BGS) triangulation, the sensor restricts optical black-white contrast error to less than 15% across distances up to 200 mm. This guarantees reliable, bounce-free detection of diverse workpieces, dark matte plastics, and coarse or reflective textures without false triggering caused by moving machinery or reflective conveyors directly behind the target plane. It delivers a guaranteed operating range from 2 mm to 400 mm, with precise scanning range calibration achieved via an integrated multiturn potentiometer (20 to 400 mm adjustable span).

Engineered for high-speed automated environments, the HT5B/4 delivers a high 1,000 Hz switching frequency with an ultra-responsive 0.5 ms response time, making it an ideal choice for high-throughput packaging, robotic pick-and-place, and intralogistics sorting machinery. The miniature housing is molded from high-grade PC-ABS plastic with a scratch-resistant PMMA lens cover, achieving IP67 and IP69K ingress protection alongside stringent ECOLAB chemical resistance certification across an ambient temperature range of -40°C to +60°C. Equipped with a PNP transistor light-switching output, integrated short-circuit and reverse polarity protection, and an integrated 2-meter 3-wire PUR cable, the sensor ensures dependable, long-term performance.

• Brand: Leuze (Germany)
• Product Series: Series 5B
• Part Number: HT5B/4 (50148002)
• Operating Principle: Diffuse reflection principle with background suppression (BGS)
• Beam Path: Focused beam path
• Focal Distance: 200 mm
• Light Source: Visible Red LED, pulsed transmission
• Wavelength: 645 nm
• LED Risk Group: Exempt group (acc. to EN 62471)
• Light Spot Geometry: Round
• Operating Range (White 90%): 0.002 ... 0.4 m (2 ... 400 mm)
• Operating Range (Gray 18%): 0.005 ... 0.3 m (5 ... 300 mm)
• Operating Range (Black 6%): 0.01 ... 0.2 m (10 ... 200 mm)
• Operating Range Limit: 0.002 ... 0.4 m
• Adjustment Range: 20 ... 400 mm
• Black-White Error: < 15% (up to 200 mm scanning distance)
• Operating Supply Voltage (UB): 10 ... 30 V DC (incl. residual ripple 0 ... 15%)
• Open-Circuit Current: 0 ... 15 mA
• Number of Digital Outputs: 1 output
• Switching Element: PNP Transistor
• Switching Principle: Light switching
• Maximum Output Load Current: 100 mA
• Switching Frequency: 1,000 Hz
• Response Time: 0.5 ms
• Readiness Delay: 300 ms
• Protective Circuits: Short-circuit protection & Polarity reversal protection
• Sensitivity Adjustment: Multiturn rotary potentiometer
• Display Indicators: Yellow LED (switching output status), Green LED (operating voltage ready)
• Electrical Connection: Integrated cable, 2,000 mm (2m) length
• Cable Sheathing Material: PUR (Black color)
• Conductor Count / Cross Section: 3-wire x 0.2 mm²
• Housing Construction: Miniature Cubic design
• Housing Dimensions (W x H x L): 11.4 mm x 32.1 mm x 17.8 mm
• Housing Material: Plastic (PC-ABS, Industrial Red/Black)
• Lens Cover Material: Plastic (PMMA)
• Net Weight: Approx. 50 g
• Mounting Method: Through-hole mounting (M3)
• Degree of Protection: IP67, IP69K
• Material Compatibility: ECOLAB certified
• Protection Class: Class III
• Standards & Certifications: cULus, IEC 60947-5-2
• Ambient Operating Temperature: -40 °C to +60 °C
• Storage Temperature: -40 °C to +70 °C