SICK WTB4-3P3161S11

The SICK WTB4-3P3161S11 belongs to the SICK W4 series of miniature photoelectric sensors. It leverages SICK’s extensive technical expertise in industrial sensing and utilizes an integrated ASIC chip design to achieve an optimal balance between high performance and cost-effectiveness.

If you are looking for fast delivery and a stable supply at a competitive price, consider Floating Light Automation as your supplier; as an authorized distributor, we provide brand-new, genuine products.

What is the SICK WTB4-3P3161S11?

The SICK WTB4-3P3161S11 is a miniature diffuse-reflection photoelectric sensor featuring a built-in visible red LED light source (650 nm wavelength), which facilitates on-site setup and installation.

It offers a maximum sensing range of 1000 mm; users can adjust the detection distance via a potentiometer knob on the side of the sensor to suit various application scenarios.

1. Electrical Performance

The WTB4-3P3161S11 operates on a DC 10–30 V power supply and features a PNP three-wire output interface, making it compatible with most mainstream PLCs and industrial control systems on the market.

Its output mode is Normally Open (NO), meeting standard logic control requirements in industrial settings.

The sensor includes short-circuit protection to effectively prevent damage caused by wiring errors or load faults. With a response frequency of up to 1000 Hz, it reliably detects fast-moving objects, avoiding missed detections or false triggers.

2. Environmental Adaptability

With an IP67 protection rating, the sensor effectively blocks the ingress of dust and moisture, ensuring stable operation in harsh industrial environments characterized by dust, oily fumes, or high humidity.

It operates within a temperature range of -40°C to +60°C, making it suitable for extreme environments such as cold storage facilities and high-temperature processing workshops.

It also boasts excellent immunity to ambient light interference, functioning correctly without false triggering even under intense direct sunlight of 100,000 lux.

3. Dimensions and Form Factor

The WTB4-3P3161S11 features a miniature ABS housing measuring just 12.4 × 32.4 × 20 mm, allowing for easy installation in the confined spaces often found in automation equipment and production line machinery.

It supports standard M12 connector wiring, facilitating quick on-site installation, removal, and replacement, thereby reducing maintenance time and costs.

Model Comparison: WTB4 Series Common Models

In order to help users choose the most suitable product for their application scenarios, we compare the WTB4-3P3161S11 with other common models of the SICK WTB4 series as follows:

From the above comparison, it can be seen that WTB4-3P3161S11 has a longer sensing distance than most short-range models in the same series, and its price is more advantageous than long-range retro-reflective models, which is the most cost-effective choice for most conventional medium and long-distance detection applications.

If your site uses an NPN output control system, we recommend you to choose the alternative model WTB4-3N3161S11 with the same sensing distance.

If you need to detect transparent objects such as glass and packaging film, we recommend you to choose WTV4-3P3161S13 of the same series, which has better performance for transparent objects.

Collocation Recommendations

According to different application scenarios, we provide the following collocation recommendations for users who purchase WTB4-3P3161S11:

1. Wiring and Installation Accessories Collocation

The SICK WTB4-3P3161S11 itself does not come with a matching connecting cable, we recommend that you purchase a corresponding M12 4-pin connector cable together with the sensor.

According to different wiring length requirements, we recommend the following collocation:

· Fixed installation with short wiring distance (within 2m): SICK DOS-1204-G 2m pre-assembled cable, direct wiring, no need for on-site crimping, convenient and fast.

· Long distance wiring or flexible movement requirements (5m): SICK DOS-1204-G 5m cable, suitable for long-distance wiring between sensors and control cabinets, stable transmission signal.

· For applications that require frequent disassembly: We recommend that you choose a straight male connector with wiring end, which is convenient for later maintenance and replacement.

2. Multi-sensor Combined Application Collocation

In automated production line packaging counting applications, we recommend collocating 2 WTB4-3P3161S11 for cross-position detection, to avoid missed counting caused by the superposition of multiple packages.

The first sensor is installed at the entrance of the conveyor belt, and the second sensor is installed 30cm downstream, which can realize the functions of package speed detection and counting at the same time, and the cost is much lower than that of using a high-cost encoder.

In the three-dimensional warehouse cargo access detection, we recommend collocating one WTB4-3P3161S11 for each cargo position, combined with SICK's SIG200 safety gate system, to realize the full monitoring of cargo position status, with stable detection performance and low overall transformation cost.

3. System Compatibility Collocation

The PNP output interface of WTB4-3P3161S11 is fully compatible with Siemens S7 series, Mitsubishi Q series, Allen-Bradley and other mainstream PLC control systems, and can also be directly connected to industrial Internet of Things gateways to realize remote status monitoring.

If you need to collect sensor data to the cloud platform, we recommend collocating our conventional edge acquisition module, which can realize the transparent transmission of sensor switching signals, which is convenient for users to complete the construction of industrial Internet of Things systems.

Core Technical Parameters

Application Scenarios

SICK WTB4-3P3161S11 is widely used in various industrial automation fields, including but not limited to:

· Conveyor belt object counting and presence detection in automated production lines

· Cargo position detection and access confirmation in automated warehouses and three-dimensional storage systems

· Package positioning and size detection in logistics sorting systems

· Material presence detection and feeding counting in packaging automation equipment

· Workpiece positioning detection in woodworking, metal processing and other processing equipment

· Position detection of moving parts in automated assembly equipment

Why Choose Floating Light Automation?

Floating Light Automation is a formal bulk supplier of SICK industrial automation products, and has established a long-term stable cooperative relationship with SICK's authorized distributors and channel suppliers.

At present, we maintain more than 300 units of WTB4-3P3161S11 in our warehouses in China and Singapore, which can meet the demand of small batch trial use and large bulk procurement of global users.

For conventional orders under 50 units, we can complete delivery within 48 hours after payment; for bulk orders over 100 units, we can support delivery scheduling according to the user's construction progress, and ensure that the supply cycle does not exceed 7 working days.

All WTB4-3P3161S11 products sold by Floating Light Automation are original new products from official channels, 100% genuine guarantee, no refurbished products, no second-hand products, no parallel miscellaneous goods.

Each product comes with the original factory QC certificate and factory serial number, which can be queried and verified through SICK's official website.

We provide a 12-month official warranty service, within the warranty period, if there is a non-human damage product quality problem, we support free replacement or full refund.

For users with special demand for large quantities, we can provide targeted bulk price discounts and customized supply plans, and support flexible delivery methods such as LCL and FCL.

We can also provide product pre-testing services before delivery to ensure that each product delivered to users meets SICK's original factory performance standards, avoiding the problem of after-sales downtime caused by product quality.

FAQ

Q: How do I adjust the sensitivity of the SICK WTB4-3P3161S11?

A: The WTB4-3P3161S11 is equipped with a 5-turn potentiometer for sensitivity adjustment. The 5-turn design offers finer adjustment precision than standard single-turn controls, allowing for more accurate setting of the switching point. Adjustment method:

Place the target object at the desired detection distance, slowly rotate the potentiometer until the output indicator lights up steadily, then rotate it slightly further to ensure sufficient detection margin.

Q: What is the switching function of the WTB4-3P3161S11?

A: The switching function of the WTB4-3P3161S11 is "Light-on," meaning:

When the object is within the detection range (reflected light present): Output ON

When the object is outside the detection range (no reflected light): Output OFF

Q: What should I do if the detection range decreases or detection becomes unstable?

A: Possible causes and solutions:

Dirty optical components → Clean the sensor lens surface

Ambient temperature out of range → Ensure the ambient temperature is within the -40°C to +60°C range

Target object reflectivity too low → Detection range decreases for dark-colored objects; move the object closer to the sensor

Loose sensor mounting → Check that the mounting screws are tightened securely