Introduction: Why the SICK NT6-14920S17 Matters
The SICK NT6-14920S17 contrast sensor was once a mainstay in industrial automation, particularly within high-speed packaging and printing systems. Known for its durable zinc housing, 9 mm fixed sensing distance, and dependable red/green LED optics, this device set the benchmark for registration mark detection. However, as with all technology, the NT6 series has reached its lifecycle end. Today, it stands as a discontinued product, replaced by more advanced, digitally driven alternatives.
For businesses still relying on the SICK NT6-14920S17, understanding its technical profile and available migration paths is crucial. This article provides an in-depth look at the sensor’s design, functionality, applications, and the recommended transition to modern SICK platforms like the KT10 and KTX series.
The SICK NT6-14920S17: Overview and Obsolescence Status
The SICK NT6-14920S17 (part number 1010615) is a registration control scanner purpose-built for precision in material handling systems. Utilizing dual red and green LEDs, it detects contrast marks on moving webs or packaging materials with exceptional accuracy. Designed for close-range detection at a fixed 9 mm distance, it supported industries requiring microsecond-level timing precision.
However, this sensor has been officially discontinued, signaling the end of its production lifecycle. While existing stocks may still circulate in the market, continued reliance on this legacy device carries operational risks—notably downtime due to component failure and the absence of digital diagnostics. Modern production demands higher speed and smarter feedback systems, which the NT6 cannot fully deliver.
Businesses are therefore encouraged to plan for an immediate migration to newer SICK models that integrate digital configuration, IO-Link connectivity, and higher switching frequencies.
Technical Specifications and Datasheet Insights
Optical and Sensing Characteristics
The SICK NT6-14920S17 operates using contrast detection, allowing both light and dark switching depending on configuration. It employs a dual LED setup—red and green—to distinguish between color marks and background materials. The sensing distance is fixed at 9 mm, with a tolerance of ±2 mm, requiring precision alignment during installation.
Its focused light spot measures 1.5 x 5 mm (green) or 1.5 x 4 mm (red), depending on the configuration. This design allows fine mark resolution, a key advantage in packaging applications. The LEDs feature an average service life of 10,000 hours at 25°C, ensuring durability even under continuous operation.
Electrical Interface and Power Requirements
The sensor operates within a 10–30V DC voltage range, typical for industrial automation environments. It consumes less than 80 mA in no-load conditions and offers both short-circuit and reverse-polarity protection. Output options include NPN, PNP, or push-pull configurations, with a maximum output current of 200 mA.
This makes the SICK NT6-14920S17 compatible with various PLC and relay systems while maintaining robust electronic protection against interference and electrical stress.
Dynamic Performance Metrics
With a switching frequency of 10 kHz and a response time greater than 50 microseconds, the NT6-14920S17 was well-suited for moderate-speed applications. However, this performance cap limits its capability in high-speed modern production systems. Successor models like the KTX series achieve switching frequencies up to 50 kHz, offering a fivefold increase in performance and enabling much faster web speeds or improved accuracy.
Mechanical Design and Physical Integration
Housing and Durability
The sensor features a die-cast zinc body with an IP67 rating, offering dust-tight and water-resistant protection. Its rugged design enables deployment in harsh industrial environments prone to vibration, moisture, or airborne contaminants.
Dimensions measure 80 mm x 30.4 mm x 64 mm, with a weight of approximately 540 g (including the cable). These proportions make it mechanically stable and compatible with most industrial mounting frameworks.
Mounting Configuration
The SICK NT6-14920S17 mounts using two M5 threaded holes spaced 28 mm apart. Its flexible optical design allows emission from either the long or short side of the housing, enhancing integration flexibility. This physical design is key when selecting replacement models, ensuring that new sensors align with the same footprint for retrofit compatibility.
Cabling and Connectivity
The NT6-14920S17 variant comes with a fixed 2-meter 4-conductor cable (0.34 mm² shielded PVC). It is crucial to maintain handling precautions, such as avoiding cable bending below 0°C. Other NT6 variants feature detachable M12 connectors, but the hardwired configuration ensures durability in vibration-heavy setups.
Operational Setup and Adjustments
Manual Potentiometer Tuning
A defining trait of the SICK NT6-14920S17 is its analog setup method. Sensitivity is adjusted via a manual potentiometer—a physical dial that determines the detection threshold. While this method provides control, it also introduces drift over time due to vibration or environmental factors, which can cause false readings or missed marks.
Modern sensors eliminate this limitation through digital teach-in functionality and automatic drift correction, maintaining consistent performance over extended periods.
Switching Modes
The NT6-14920S17 supports both light-on and dark-on switching modes. Depending on configuration, the output voltage swings from near-supply voltage (logic HIGH) to below 2V (logic LOW). Certain variants also offer analog outputs for continuous monitoring of contrast intensity—useful for advanced diagnostics.
Advanced Optical Features
Despite its age, the sensor incorporated automatic gloss adjustment, compensating for variations in reflectivity caused by shiny surfaces like metallic films or coated packaging materials. This made it a reliable performer even in low-contrast or high-glare conditions, maintaining accurate registration detection.
Compliance, Certifications, and Industry Standards
The SICK NT6-14920S17 adheres to global industrial compliance standards. It is CE-certified for electromagnetic compatibility and safety, with cTUVus approval for North American markets. The sensor also complies with IEC 60068 shock and vibration testing and operates in environments between 0°C and +50°C.
Its protection rating (IP67) confirms suitability for environments with dust exposure or light washdowns. From a regulatory standpoint, its classification under ECLASS (27270906), ETIM (EC001820), and UNSPSC (39121528) ensures easy documentation integration in ERP and CAD systems.
Typical Applications of the SICK NT6-14920S17
Registration Mark Detection
The SICK NT6-14920S17 excels in detecting registration marks on moving materials, enabling precise timing for cutting, folding, or sealing processes. Its role in aligning print marks ensures flawless packaging presentation and material efficiency.
Reliable Performance in Challenging Environments
Thanks to its dual-color LED system and gloss adjustment, it maintains reliable operation even with jittering webs or reflective materials. This reliability is vital for consistent performance in automated packaging and printing lines.
Industrial Sectors Served
The sensor found widespread use in:
- Packaging & Converting: For bag-making, labeling, and sealing operations.
- Printing: Ensuring print-to-cut alignment in high-speed web presses.
- General Automation: Providing precise signal triggering for material handling and assembly systems.
Accessories and System Integration
Although the SICK NT6-14920S17 comes with an integrated cable, users can employ standard M12 connectors for other NT6 models. For mechanical flexibility, compatible mounting brackets (like SICK’s BEF series) can be used to achieve angular adjustments and fine alignment.
These accessories simplify maintenance and ensure stable positioning over long-term operations.
Migration Strategy: From NT6 to KT10 and KTX Series
KT10: The Logical Successor
The SICK KT10 offers significant improvements:
- Speed: 25 kHz switching frequency
- Optics: RGB LED technology for detecting difficult color contrasts
- Stability: Automatic drift correction
- Ease of Use: Digital teach-in with bar graph feedback for setup accuracy
The KT10 series serves as a drop-in replacement for users seeking a balance of cost-efficiency and improved performance.
KTX: The Future-Proof Upgrade
The SICK KTX series represents the highest standard of registration sensing today. Its features include:
- Speed: 50 kHz switching frequency with 5µs jitter
- Optical Precision: TwinEye technology for detecting marks on glossy or fluctuating materials
- Connectivity: Full IO-Link support for digital communication, diagnostics, and remote parameterization
- Compatibility: Mechanically and electrically compatible with KT and NT6 families
By transitioning to the KTX, manufacturers unlock predictive maintenance, higher process speeds, and reduced setup time—ensuring operational longevity.
Comparative Summary: NT6 vs KT10 vs KTX
|
Feature |
NT6-14920S17 |
KT10 Series |
KTX Series |
|
Status |
Discontinued |
Active |
Active |
|
Switching Frequency |
10 kHz |
25 kHz |
50 kHz |
|
Adjustment Method |
Manual Potentiometer |
Digital Teach-in |
IO-Link + Multiple Modes |
|
Light Source |
Red/Green LED |
RGB LED |
RGB TwinEye |
|
Connectivity |
Analog Output (Optional) |
Bar Graph Display |
IO-Link Diagnostics |
Why Digital Migration Matters
Migrating from the SICK NT6-14920S17 to modern platforms is not just a component replacement—it’s a system upgrade. Newer sensors like the KTX enable higher throughput, remote diagnostics, and adaptive learning, minimizing human error and maximizing uptime. The transition also future-proofs your production line by aligning it with Industry 4.0 standards and digital integration frameworks.
Related Product Collections ➡
Industrial Electrical & Automation ➡
Explore our collection of industrial automation products—from sensors to controllers—designed to streamline production efficiency and precision.
Find high-quality contactors, starters, and protection devices to enhance your motor control systems and optimize performance.
Control Relays (Motor Control Equipment) ➡
Ensure reliable signal transmission and switching with our durable range of industrial control relays compatible with automation applications.
Conclusion: Future-Proofing Industrial Sensing
The SICK NT6-14920S17 served the automation world with precision and reliability, but its discontinuation signals the need for evolution. For packaging, printing, and material handling systems aiming to maintain efficiency, transitioning to modern successors like the SICK KTX is essential.
Upgrading ensures faster response times, improved accuracy, and seamless integration into digital infrastructures—laying the foundation for smarter, more resilient automation systems.
Explore the latest SICK KTX contrast sensors to see how your system can benefit from advanced speed, connectivity, and long-term sustainability.
