The Leuze HT5.1/2 (Part Number: 50129399) is a high-performance diffuse reflection photoelectric sensor with active background suppression belonging to the advanced Series 5 generation by Leuze electronic (Germany). Engineered to deliver unmatched optical reliability, this sensor guarantees dependable object detection across close and medium ranges within modern industrial automation setups.

OUTSTANDING FEATURES AND OPERATIONAL ADVANTAGES:
1. Precise Optical Background Suppression:
Utilizing geometric triangulation measurement, the sensor completely suppresses optical interference caused by reflective backgrounds, polished metal machine parts, or moving conveyor belts. With a minimal black-white error (< 15% up to 200 mm), it ensures reliable object detection regardless of target color or surface reflectivity.
2. Visible Pulsed Red LED Light Source (645 nm):
Emits a concentrated, round visible light spot with a fixed focal distance of 200 mm. This facilitates rapid optical alignment and pinpoint targeting onto objects even at greater distances.
3. Multiturn Potentiometer for Easy Calibration:
Equipped with a sensitive multiturn potentiometer, enabling operators to calibrate and fine-tune the detection cutoff threshold precisely across the 15 mm to 400 mm operating span.
4. Ultra-Fast 1,000 Hz Switching Frequency & 0.5 ms Response Time:
With an ultra-swift 0.5 ms response rate, the sensor effortlessly handles high-speed counting, sorting, and positioning tasks on high-throughput assembly and packaging lines without missing a cycle.
5. Durable Cubic Housing with Integrated M3 Threaded Sleeves:
Constructed from rugged PC-ABS plastic paired with a scratch-resistant PMMA lens window rated IP67. The housing features two integrated M3 threaded brass inserts (tightening torque: 0.9 N·m), preventing damage to the casing during rigid bolt mounting.
6. Comprehensive Circuit Protection & Dual Status LEDs:
Features built-in short-circuit protection and supply polarity reversal protection. Two visible LED status indicators provide immediate feedback on power status and active switching output.

TYPICAL INDUSTRIAL APPLICATIONS:
• Packaging & Bottling Machinery: Detection of cartons, plastic bottles, containers, and blister packaging on infeed belts.
• Material Handling & Logistics: Parcel and package presence sensing on high-speed automated sorting conveyors.
• Machine Tooling & Precision Mechanics: Position verification of stamped parts, metal sheets, and tooling fixtures before automated machining steps.
• Electronics Manufacturing: Verification of printed circuit board (PCB) presence, electronic modules, and component carriers.

• Manufacturer: Leuze electronic
• Part Number / Model: HT5.1/2
• Order Number (Part no.): 50129399
• Series: Series 5
• Brand Origin: Germany
• Operating Principle: Diffuse reflection principle with background suppression
• Light Source: Pulsed visible red LED (645 nm)
• LED Group: Exempt group (according to EN 62471)
• Light Spot Geometry: Round
• Beam Focus: Fixed (Focal distance 200 mm)
• Black-White Error: < 15% up to 200 mm
• Guaranteed Operating Range (White 90%): 0.005 ... 0.4 m (5 mm – 400 mm)
• Guaranteed Operating Range (Gray 18%): 0.01 ... 0.3 m (10 mm – 300 mm)
• Guaranteed Operating Range (Black 6%): 0.015 ... 0.2 m (15 mm – 200 mm)
• Operating Range Limit: 0.005 ... 0.4 m
• Adjustment Range: 15 ... 400 mm (via Multiturn potentiometer)
• Supply Voltage (UB): 10 ... 30 V DC (Residual ripple 0 ... 15%)
• Open-Circuit Current: 0 ... 15 mA
• Digital Switching Outputs: 1 output
• Switching Element: Transistor NPN
• Switching Principle: Light switching
• Switching Frequency: 1,000 Hz (1 kHz)
• Response Time: 0.5 ms
• Readiness Delay: 300 ms
• Protective Circuits: Polarity reversal protection, short-circuit protection
• Status Indicators: 2 LEDs (Power and Switching Status)
• Connection: 2,000 mm (2 m) PVC cable
• Dimensions (W x H x L): 11.4 mm x 32.1 mm x 17.8 mm
• Net Weight: 50 g
• Mounting Type: Two M3 threaded metal sleeves (Recommended torque: 0.9 N·m)
• Housing Material: PC-ABS Plastic (Color: Red RAL 3000 and Black)
• Lens Cover Material: PMMA Plastic
• Ingress Protection: IP 67
• Protection Class: Class III
• Operating Temperature Range: -40 °C ... +60 °C
• Storage Temperature Range: -40 °C ... +70 °C
• Standards & Certifications: IEC 60947-5-2, cULus Listed