If you work with industrial automation, you know that choosing the right sensor can make or break the reliability of a production line. The SICK VTF18-4P1340 photoelectric sensor is one of those compact but critical devices that quietly keeps systems running smoothly. In this guide, we’ll translate the dense technical data into practical insights so you can quickly decide when, where, and how to use the SICK VTF18-4P1340 photoelectric sensor in real-world applications.
We’ll walk through how its background suppression (BGS) works, why its M18 metal housing matters, what its electrical specs really mean on the plant floor, and how to think about procurement and installation. By the end, you’ll be able to evaluate whether the SICK VTF18-4P1340 photoelectric sensor is the right fit for your machines, conveyors, or logistics systems.
What Is the SICK VTF18-4P1340 Photoelectric Sensor?
At its core, the SICK VTF18-4P1340 photoelectric sensor is a cylindrical M18 photoelectric proximity device designed for precise object detection at short ranges. It sits within SICK’s V18 family of sensors, which are widely used in industrial environments because they share a common mechanical format, making upgrades and replacements straightforward.
The part is identified by two key codes:
- Model number: VTF18-4P1340
- Manufacturer part number: 6012849
When you specify or purchase the SICK VTF18-4P1340 photoelectric sensor, the 7‑digit part number (6012849) is what gives you procurement accuracy and traceability. It helps maintenance teams and purchasing departments ensure they are consistently buying the exact same device when a sensor needs replacement.
Mechanically, the sensor uses an M18 x 1 cylindrical thread and a compact body length of around 75 mm. That makes the SICK VTF18-4P1340 photoelectric sensor easy to integrate into standard bracket systems and machine frames where M18 sensors are already part of the design language.
From a commercial perspective, this sensor is typically offered at a higher price point through authorized distributors compared with the secondary market. That is because the SICK VTF18-4P1340 photoelectric sensor is a highly specified, industrial‑grade component that is often used in mission‑critical applications where reliability and support matter more than the lowest possible upfront cost.
How the SICK VTF18-4P1340 Photoelectric Sensor Uses Background Suppression
One of the standout features of the SICK VTF18-4P1340 photoelectric sensor is its use of background suppression (BGS), also called background blanking. This is not just a buzzword; it fundamentally changes how the sensor “sees” objects in front of it.
Traditional diffuse sensors simply trigger when light is reflected back from any surface within a certain range. The SICK VTF18-4P1340 photoelectric sensor behaves differently. It uses an optical triangulation method to determine the distance of the object, not just the presence of reflected light. That means the sensor is tuned to a specific detection plane, and anything behind that plane is intentionally ignored.
Here’s how the background suppression principle works in practice:
- The sensor emits light from its LED.
- The light hits the target and reflects back into the receiver optics.
- Depending on where the target is located, the reflected light strikes different positions on the receiver element.
- The SICK VTF18-4P1340 photoelectric sensor evaluates this angle and determines whether the target sits within its defined sensing range.
- Any reflection coming from the “background” (surfaces further away than the cutoff point) is suppressed.
The result is that the SICK VTF18-4P1340 photoelectric sensor can reliably detect dark, matte, or low‑reflective objects even when they are in front of shiny or brightly colored machine surfaces. For example, a black rubber component moving on a polished stainless steel conveyor can still be detected without the sensor constantly being fooled by the reflective conveyor bed.
In applications where false triggers from the background cause downtime or quality issues, the background suppression of the SICK VTF18-4P1340 photoelectric sensor is a major advantage.
Sensing Range and Optical Performance of the SICK VTF18-4P1340 Photoelectric Sensor
When evaluating a sensor, the sensing range and optical performance are often the first areas engineers look at. The SICK VTF18-4P1340 photoelectric sensor is built for short‑range but highly precise detection, which fits many assembly and material‑handling tasks.
Key optical parameters include:
- Sensing range (operating envelope): approx. 3 mm to 100 mm
- Recommended standard sensing range: approx. 3 mm to 90 mm for maximum stability
- Light source: Infrared LED
- Light spot size: Ø 3 mm at 50 mm distance
- Optics: Focused optics designed for a tight, accurate beam
The tight 3 mm light spot at 50 mm is particularly important. It means the SICK VTF18-4P1340 photoelectric sensor can detect small features, narrow edges, or compact components with reliable repeatability. In many M18 sensors designed for general presence detection, the spot size is larger and less defined, making them less suited for fine positioning tasks.
Another crucial factor is speed. The SICK VTF18-4P1340 photoelectric sensor offers:
- Response time: ≤ 2 ms
- Switching frequency: 250 Hz
That allows the sensor to accurately track fast‑moving objects. In conveyor systems, packaging lines, or automated assembly stations where parts move quickly in front of the sensor, the high switching frequency of the SICK VTF18-4P1340 photoelectric sensor helps prevent missed detections.
However, it’s important to remember that the maximum usable sensing range depends on the target’s reflectivity. Highly reflective white objects can be detected at greater distances than dark surfaces with only 6% remission. Good engineering practice is to deliberately derate the sensing distance when using the SICK VTF18-4P1340 photoelectric sensor for dark or low‑contrast targets, keeping real‑world operation safely inside the stable region.
Electrical Characteristics of the SICK VTF18-4P1340 Photoelectric Sensor
Electrical compatibility and protection features are just as important as optical performance. The SICK VTF18-4P1340 photoelectric sensor is designed to integrate seamlessly into modern PLC‑based systems while resisting common electrical faults.
Here are the key electrical specs:
- Supply voltage (UB): 10 V DC to 30 V DC
- Voltage ripple tolerance: ±10%
- Current consumption (no load): around 30 mA
- Protection class: Class III DC operation
The broad 10–30 V DC input range makes the SICK VTF18-4P1340 photoelectric sensor suitable for both 12 V and 24 V control systems, which are standard in industrial automation. The modest current draw helps keep control cabinets thermally stable and power supplies well within design margins.
The switching output of the SICK VTF18-4P1340 photoelectric sensor is:
- Output type: PNP (sourcing output)
- Maximum output current: ≤ 100 mA
- Switching mode: Selectable light / dark switching via control wire
A PNP output means the sensor sources positive voltage to the input of a PLC or relay when it detects an object. This is compatible with the vast majority of modern PLC inputs, which are typically designed as sinking inputs. The 100 mA maximum output current clearly indicates that the SICK VTF18-4P1340 photoelectric sensor is intended to drive logic inputs, not heavy loads such as solenoids or motors directly.
The light/dark switching option is controlled by a dedicated wire, allowing you to set whether the SICK VTF18-4P1340 photoelectric sensor turns its output on when it sees an object (light‑on) or when it doesn’t (dark‑on). During commissioning, this flexibility is useful, but once the logic is finalized, many integrators permanently fix the control line to a defined level for consistent operation.
Built‑In Protection and Reliability in the SICK VTF18-4P1340 Photoelectric Sensor
In many factories, sensors fail not because of poor design but because of wiring mistakes, aggressive transients, or short circuits. The SICK VTF18-4P1340 photoelectric sensor addresses these risks with a comprehensive set of protection features built into the device electronics.
These include:
- Reverse polarity protection on the supply connections
- Reverse polarity protection on the inputs and output
- Interference suppression to filter electrical noise
- Overcurrent and short‑circuit protection on the output
For electricians and automation engineers, this means the SICK VTF18-4P1340 photoelectric sensor is more forgiving during installation and maintenance. If someone accidentally swaps the power wires or momentarily shorts the output, the sensor is designed to withstand these events without immediate catastrophic failure.
While you should never rely on internal protection as a substitute for correct wiring and proper fusing, these safeguards significantly reduce the risk of hidden or intermittent faults. Over time, the built‑in protection of the SICK VTF18-4P1340 photoelectric sensor helps maintain uptime and simplifies troubleshooting when issues do arise in the field.
Mechanical Design and Environmental Ratings of the SICK VTF18-4P1340 Photoelectric Sensor
A sensor’s mechanical construction often determines whether it will survive the reality of a production environment. The SICK VTF18-4P1340 photoelectric sensor is built with a rugged metal housing and industrial‑grade sealing to withstand demanding conditions.
The key mechanical characteristics are:
- Housing format: Cylindrical M18 x 1
- Housing length: approx. 75 mm
- Weight: around 120 g
- Housing material: Nickel‑plated brass
- Optical face material: Plastic (PMMA)
The nickel‑plated brass housing of the SICK VTF18-4P1340 photoelectric sensor provides excellent resistance to mechanical impact, vibration, and wear compared with plastic‑bodied sensors. It is well suited for mounting on metal frames, near moving parts, and in installations where incidental contact might occur.
Environmental protection is also robust:
- Enclosure rating: IP67 rating
- Operating temperature range: –25°C to +70°C
An IP67 rating means the SICK VTF18-4P1340 photoelectric sensor is dust‑tight and protected against temporary immersion in water. In practice, this makes it suitable for washdown areas (within reason), high‑humidity environments, and certain outdoor or semi‑outdoor installations. The wide operating temperature range allows the sensor to function in cold storage applications as well as warmer process areas.
Although the specific shock and vibration ratings are not explicitly listed in the summarized data, similar SICK M18 metal‑housed sensors are typically tested to industrial standards for vibration and shock. This reinforces the expectation that the SICK VTF18-4P1340 photoelectric sensor can be used on conveyors, machine tools, and other vibrating equipment without early failure.
Connection and Mounting Options for the SICK VTF18-4P1340 Photoelectric Sensor
A sensor is only as reliable as its installation. The SICK VTF18-4P1340 photoelectric sensor uses a standard connection and offers several mounting and cabling options so you can tailor the setup to your application.
Connection Interface
The SICK VTF18-4P1340 photoelectric sensor uses a male M12, 4‑pin connector. This is a widely adopted standard in industrial automation, so you can use compatible M12 cordsets from SICK or other quality manufacturers.
This plug‑in connection makes replacement quick: a faulty unit can be swapped without rewiring, and maintenance teams simply reconnect the M12 plug to restore operation. It also simplifies initial installation of the SICK VTF18-4P1340 photoelectric sensor, since cables can be pre‑terminated and tested before being routed through the machine.
Mounting Brackets
SICK offers specific bracket options for the SICK VTF18-4P1340 photoelectric sensor and other M18 devices:
- BEF‑WN‑M18 (Part No. 5308446): A zinc‑coated steel mounting bracket for general‑purpose use in non‑corrosive environments.
- BEF‑KHS‑N11N (Part No. 2071081): A stainless‑steel bracket for corrosive, hygienic, or washdown environments.
By selecting the right bracket, you ensure the SICK VTF18-4P1340 photoelectric sensor is held firmly in place, aligned correctly, and protected from unnecessary mechanical stress. In high‑vibration environments, a rigid mounting combined with appropriate locknuts helps maintain alignment and prevent drift.
Cable and Connector Options
Cabling is often overlooked, but it is critical to long‑term reliability. For the SICK VTF18-4P1340 photoelectric sensor, SICK recommends several cable types depending on the application:
- PVC jacket cable (e.g., YF2A14‑050VB3XLEAX): Suitable for general‑purpose, static, or mildly dynamic applications. Cost‑effective and adequate for many standard installations where the cable is not constantly flexed.
- PUR jacket cable (e.g., YF2A14‑050UB3XLEAX): A halogen‑free, oil‑resistant cable designed for high‑flex and harsh environments. Ideal for drag chains, robot arms, and moving equipment.
For custom lengths, field‑wireable connectors such as the STE‑1204‑G (M12, 4‑pin) allow technicians to build tailored cables on‑site. This flexibility helps ensure the SICK VTF18-4P1340 photoelectric sensor is connected in the most robust way for each installation.
Real‑World Use Cases for the SICK VTF18-4P1340 Photoelectric Sensor
Understanding where the SICK VTF18-4P1340 photoelectric sensor shines in the field is just as important as understanding its raw specifications. Thanks to its background suppression, high switching frequency, and rugged housing, it fits a variety of demanding applications.
Precision Positioning and Assembly
In automated assembly cells, small components often need to be detected at precise points on a fixture or conveyor. The focused optics and tight light spot of the SICK VTF18-4P1340 photoelectric sensor allow it to detect the presence or absence of parts with high accuracy.
Examples include:
- Verifying that a component is correctly seated in a pocket before a press operation
- Confirming the orientation of parts at a pick‑and‑place station
- Checking that a subassembly is present before starting the next process step
Because the background can be ignored, metallic fixtures and tooling behind the part do not cause false triggers. This makes the SICK VTF18-4P1340 photoelectric sensor particularly useful in compact fixtures where there is little separation between the target and the background.
High‑Speed Material Handling
On conveyors and sorting lines, objects may pass quickly through the sensing area. The 250 Hz switching frequency of the SICK VTF18-4P1340 photoelectric sensor supports reliable counting of items, detection for reject mechanisms, and triggering for labeling or printing.
Typical tasks include:
- Counting items into boxes or trays
- Detecting the leading edge of packages for print mark activation
- Checking that containers arrive at the correct position for filling or capping
In these contexts, the SICK VTF18-4P1340 photoelectric sensor provides a balance of short‑range precision and fast response, which is ideal for medium‑speed production lines and automated cells.
Challenging Contrast and Reflective Backgrounds
Many production systems involve dark products moving on shiny or light‑colored equipment surfaces. Standard diffuse sensors often struggle in such conditions. The SICK VTF18-4P1340 photoelectric sensor, with its background suppression, is designed to handle exactly this challenge.
Typical scenarios include:
- Dark rubber parts moving across stainless steel or painted steel conveyors
- Low‑gloss plastic components positioned in front of bright machine guards
- Matt black components near reflective aluminum frames
By ignoring the background and focusing only on the defined sensing plane, the SICK VTF18-4P1340 photoelectric sensor maintains consistent switching behavior and helps reduce nuisance faults and downtime.
The SICK VTF18-4P1340 Photoelectric Sensor in Logistics and Port Automation
The combination of rugged mechanics and precise detection makes the SICK VTF18-4P1340 photoelectric sensor suitable even for harsh environments such as logistics hubs and port terminals. In these sectors, sensors must deal with temperature swings, weather exposure, vibration, and dirt or dust.
In container terminals and large warehouses, the SICK VTF18-4P1340 photoelectric sensor can be used for tasks such as:
- Monitoring the position of moving crane components
- Detecting the presence of containers or pallets in transfer zones
- Supporting collision prevention by confirming clear or blocked paths
Because of its IP67 protection and wide temperature range, the SICK VTF18-4P1340 photoelectric sensor can be mounted on outdoor structures, near loading bays, or in partially sheltered areas. When combined with the right cabling and stainless‑steel brackets, it becomes a reliable sensing element in mission‑critical logistics systems.
In such applications, sourcing authentic SICK VTF18-4P1340 photoelectric sensors from authorized channels is especially important. Safety, uptime, and traceability requirements often demand genuine components with full documentation and support.
Procurement Considerations for the SICK VTF18-4P1340 Photoelectric Sensor
While engineering teams focus on technology, procurement teams need to balance cost, availability, and risk. The SICK VTF18-4P1340 photoelectric sensor is available both through official distributors and through secondary markets, often at significantly different prices.
Authorized distributors typically list the SICK VTF18-4P1340 photoelectric sensor at a premium price. In return, you gain:
- Guaranteed authenticity and traceability
- Full manufacturer warranty
- Access to up‑to‑date documentation and technical support
- Confidence that storage and handling have followed recommended guidelines
Secondary market sources may offer the same part number at much lower prices. However, this can involve trade‑offs:
- Unknown storage or handling history
- Uncertain warranty or return conditions
- Potential risk of counterfeit or re‑labeled components
- Limited or no direct manufacturer backing
For non‑critical test rigs or low‑risk applications, some organizations may accept the risk of using secondary‑market units. But for systems where downtime is costly or safety is involved, many engineers and purchasing teams prefer to specify genuine SICK VTF18-4P1340 photoelectric sensors from authorized sources.
An effective procurement strategy often includes documenting the chosen source, specifying the full part number (6012849), and maintaining a small buffer stock of SICK VTF18-4P1340 photoelectric sensors for critical machines to minimize unplanned downtime.
Documentation and Integration Planning for the SICK VTF18-4P1340 Photoelectric Sensor
Integrating the SICK VTF18-4P1340 photoelectric sensor into a new or existing system is smoother when you have all the necessary documentation from the start. The primary datasheet for the sensor provides core specifications, but some details—such as CAD drawings and detailed wiring diagrams—are often found on the broader V18 product platform.
When you plan a project around the SICK VTF18-4P1340 photoelectric sensor, it’s wise to:
- Download the full operating instructions from the manufacturer’s website. These include wiring details, light/dark switching configuration, and recommended mounting guidelines.
- Obtain 2D and 3D CAD files for the M18 housing. These ensure that mounting holes, brackets, and clearances in your mechanical design are correct.
- Review the characteristic curves for sensing distance versus target reflectivity. This helps you determine safe detection distances for your specific materials.
By gathering this information early, control engineers can design correct PLC logic for the SICK VTF18-4P1340 photoelectric sensor, and mechanical designers can ensure the sensor’s field of view is unobstructed, correctly aligned, and physically protected.
Best Practices for Using the SICK VTF18-4P1340 Photoelectric Sensor
To get the most out of the SICK VTF18-4P1340 photoelectric sensor, it helps to follow a few practical engineering best practices. These guidelines not only improve performance but also extend the life of the sensor.
1. Derate the Sensing Distance for Dark Targets
While the SICK VTF18-4P1340 photoelectric sensor can technically detect objects up to about 90–100 mm within its specified range, real‑world factors like target color, surface finish, and environmental conditions can reduce this. When dealing with dark or low‑reflective materials, set the sensor closer than the maximum distance suggested in the datasheet. This builds in a margin for dust buildup, minor misalignment, and aging.
2. Choose the Right Cable Type
As mentioned earlier, dynamic applications with moving cables benefit from PUR‑jacketed cordsets. If the SICK VTF18-4P1340 photoelectric sensor is installed on a robot arm, moving gantry, or drag chain, PUR cables significantly reduce the risk of cable damage over time. For static cabinet‑to‑sensor runs in sheltered environments, PVC cables are generally adequate.
3. Lock in Light/Dark Switching Logic
Once your PLC logic is finalized, make sure the light/dark switching line of the SICK VTF18-4P1340 photoelectric sensor is wired in a defined and documented way. Label terminals and update electrical drawings so maintenance staff know exactly how the sensor is configured. This prevents confusion during troubleshooting or sensor replacement.
4. Protect the Optical Face
Even though the front lens of the SICK VTF18-4P1340 photoelectric sensor is robust, it is still the most sensitive surface. Avoid mounting positions where it can be directly struck by falling objects or abrasive material flow. In dusty or dirty environments, plan for periodic cleaning of the lens using appropriate, non‑abrasive materials.
Is the SICK VTF18-4P1340 Photoelectric Sensor Right for Your Application?
With all the technical details covered, the final question is simple: should you use the SICK VTF18-4P1340 photoelectric sensor in your project? The answer depends on your priorities and application requirements.
You’re likely to benefit from the SICK VTF18-4P1340 photoelectric sensor if:
- You need reliable short‑range detection in the 30–90 mm zone.
- Your targets are close to reflective backgrounds and standard diffuse sensors have caused false triggers.
- Your application demands a rugged, metal‑housed M18 sensor with IP67 protection.
- You require fast response for counting or positioning tasks on moving conveyors or in assembly cells.
On the other hand, if your application involves very long detection distances, extremely tiny targets, or specialized sensing tasks (like color, luminescence, or through‑beam detection over long gaps), you may want to complement or replace the SICK VTF18-4P1340 photoelectric sensor with other sensor types from the broader SICK portfolio.
In many mainstream automation scenarios, however, the SICK VTF18-4P1340 photoelectric sensor offers an excellent balance of robustness, precision, and ease of integration.
Related Product Collections for Further Exploration
If you’re exploring how to integrate the SICK VTF18-4P1340 photoelectric sensor into your system, it can be helpful to review related product groups that complement this device and offer alternatives for other sensing tasks.
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SICK Sensors Collection →
Browse a wide range of SICK sensing solutions, including photoelectric, inductive, distance, and safety sensors suitable for many different industrial automation applications. -
Photoelectric Sensors Collection →
Explore a dedicated range of photoelectric sensors from leading brands for object detection, positioning, counting, and presence sensing in conveyors, packaging lines, and assembly cells. -
Photo Sensors Collection →
Discover a broader selection of photo sensors and optical detection devices designed for applications that demand precise light-based sensing and reliable switching performance.
Conclusion: Getting Started with the SICK VTF18-4P1340 Photoelectric Sensor
The SICK VTF18-4P1340 photoelectric sensor is more than just another M18 proximity device. Its background suppression, focused optics, robust nickel‑plated brass housing, and comprehensive electrical protection make it a dependable choice for demanding industrial applications. Whether you’re building new machinery, upgrading an existing line, or solving nagging detection problems caused by reflective backgrounds, this sensor provides a solid technical foundation.
By carefully managing sensing distance, selecting appropriate cabling, and using the right brackets, you can unlock the full performance of the SICK VTF18-4P1340 photoelectric sensor and help your systems run more reliably over the long term.
If you’re currently evaluating options for your next project, consider reviewing the detailed specifications, wiring diagrams, and availability on the product page for the SICK VTF18-4P1340 photoelectric sensor from your preferred supplier. Taking a closer look at the product page will help you confirm that this sensor aligns with your mechanical layout, electrical requirements, and performance targets before you finalize your design.
