SICK WTB4S‑3P2161 Miniature Background Suppression Photoelectric Sensor, 4–180 mm Adjustable Range PNP M8 Connector IP66/IP67 Ultra-Wide Temp W4S Sensor

SICK WTB4S‑3P2161 W4S Miniature PNP Background Suppression Photoelectric Sensor with M8 Connector & Extreme Temperature Resistance

Extreme Temperature Adaptability & Industrial Environmental Toughness

Industry-Leading Ultra-Wide Temperature Operating Range

SICK WTB4S‑3P2161 stands out among standard miniature photoelectric sensors with an ultra-wide operating temperature span from -40 °C to +60 °C, supporting stable detection in extreme cold workshops, low-temperature storage lines and high-heat industrial production environments. The dedicated low-temperature resistant circuit and optical structure eliminate detection drift or startup failure under freezing conditions. Storage temperature extends to -40 °C to +75 °C, ensuring safe component preservation and stable performance recovery after extreme temperature exposure.

Dual IP66/IP67 Full Ingress Protection

Adopting fully sealed one-piece housing design, SICK WTB4S‑3P2161 achieves dual IP66 and IP67 industrial protection grades. The robust sealed structure completely blocks fine industrial dust, floating debris, water splashes and high-pressure cleaning spray, adapting to dusty manufacturing floors, humid processing workshops and frequently sanitized food & beverage production lines. High structural tightness prevents internal component aging, delivering long-term stable operation with minimal maintenance.

Precision Optical Detection & High-Speed Sensing Performance

4–180 mm Flexible Adjustable Sensing Range

SICK WTB4S‑3P2161 integrates a precision mechanical potentiometer for stepless range calibration, covering 4 mm near-field micro-detection to 180 mm medium-distance monitoring. The sensor maintains stable and repeatable detection for regular and irregular targets, perfectly adapting to variable installation distances and diverse product sizes on automated lines. The adjustable range design eliminates frequent model replacement, greatly improving on-site deployment flexibility and project compatibility.

PinPoint Red LED Beam & Advanced Background Suppression

Equipped with SICK exclusive 650 nm PinPoint red LED light source, the sensor outputs a highly concentrated, clear light spot for intuitive visual alignment during installation and debugging. The optimized background suppression optical system effectively filters interference from reflective conveyor belts, metal equipment frames and uneven background surfaces. It reliably detects small, thin and low-reflectivity targets without false triggering, solving common detection errors in complex industrial scenarios.

Sub-0.5ms Ultra-Fast Response & 1000Hz Switching Frequency

Featuring ultra-fast response time below 0.5 ms and 1000 Hz high switching frequency, SICK WTB4S‑3P2161 captures high-speed passing micro-components with zero missing detection. The high-frequency dynamic sensing capability fully meets the operational demands of high-speed packaging machinery, rapid sorting systems and continuous cyclic precision assembly lines, ensuring consistent and efficient production line operation.

PNP Electrical Specifications & Full Circuit Safety Protection

Standard PNP Light-On Output Logic

SICK WTB4S‑3P2161 adopts mainstream PNP normally open light-on output, fully compatible with European-standard PLC systems and modern industrial control circuits. The active-high signal logic matches most standardized automation design schemes, supporting seamless equipment upgrade and system integration. With 100 mA maximum load current, the sensor provides stable and reliable signal driving for long-duration continuous industrial operation.

Universal DC Voltage & Low Power Consumption

The sensor operates steadily on 10 V to 30 V DC universal industrial power supply, withstanding residual voltage ripple below 5 Vss to adapt to unstable on-site power conditions. Ultra-low 20 mA static power consumption reduces long-term equipment energy consumption, achieving energy-saving and efficient factory operation. Standard industrial voltage compatibility ensures wide adaptability for new and retrofitted automation projects.

Comprehensive Multi-Layer Circuit Protection

Built with complete industrial-grade protection mechanisms including reverse polarity protection, short-circuit protection and overload resistance, SICK WTB4S‑3P2161 effectively avoids circuit damage and signal failure caused by wiring errors and instantaneous voltage surges. Professional electromagnetic interference suppression technology filters on-site signal noise, guaranteeing jitter-free stable signal output during 24/7 uninterrupted cyclic operation.

M8 Connector Mechanical Design & On-Site Maintenance Advantages

M8 3-Pin Quick Connector Structure

Different from fixed cable sensors, SICK WTB4S‑3P2161 adopts M8 3-pin male connector design for plug-and-play wiring and rapid sensor replacement. The connector structure eliminates cable bending fatigue, aging and breakage faults caused by long-term mechanical movement. Fast disassembly and assembly greatly shorten equipment maintenance downtime and improve on-site commissioning efficiency.

Compact Lightweight Industrial Housing

Constructed with high-strength Bayblend and PMMA composite materials, the miniature block housing features lightweight design and excellent mechanical durability. The high-rigidity body resists daily workshop abrasion, minor mechanical collision and environmental aging, maintaining long-term optical alignment accuracy. Ultra-compact dimensions enable flexible installation in narrow machinery gaps and dense equipment layouts.

Procurement Value & Standardized Replacement Benefits

W4S Series Universal Plug-and-Play Compatibility

SICK WTB4S‑3P2161 follows unified W4S series mechanical and electrical specifications. Standard M8 connector interface, PNP output parameters and mounting dimensions support one-to-one direct replacement for outdated W4S series photoelectric sensors. Unified model standards simplify factory spare part classification, reduce inventory types and lower overall procurement and management costs.

High Cost-Performance Extreme Environment Solution

Combining ultra-wide temperature resistance, high-speed precision detection and durable connector structure, this sensor provides exclusive solutions for extreme working conditions that ordinary photoelectric sensors cannot adapt to. Zero routine calibration and ultra-low failure rate minimize unplanned production downtime and long-term maintenance expenses, ideal for large-scale standardized deployment in special industrial environments.

Dedicated Industrial Application Scenarios

Low-Temperature & Special Environment Automation

Cold storage production lines, low-temperature food processing equipment and high-heat workshop sorting systems are core applicable scenarios. The -40 °C ultra-low temperature resistance ensures reliable detection in freezing industrial environments, solving the failure problem of ordinary sensors in extreme temperature working conditions.

High-Speed Precision Packaging & Electronic Assembly

Micro electronic component counting, thin material presence detection, high-speed packaging positioning and logistics conveyor gap monitoring fully utilize the sensor’s high-speed response and precision background suppression performance. Compact housing and stable anti-interference capability adapt to dense precision automation equipment layouts.