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WTT12L-A2563

The SICK WTT12L-A2563 is a short-range, non-contact inductive proximity sensor with an extended sensing range. It is designed to detect the presence of metallic objects (primarily ferrous metals like steel and iron) in harsh industrial environments. Known for their extreme robustness and reliability, these sensors are a fundamental component in automation for position detection, end-of-travel checking, and counting.

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Key Features
Extended Sensing Range: Offers a longer switching distance compared to standard M12 sensors, providing greater installation flexibility and tolerance for misalignment.

Non-Ferrous Factor 1: A key feature where the sensing distance for stainless steel (SS) is approximately the same as for mild steel. Many standard sensors have a reduced factor (e.g., 0.5-0.8) for stainless steel, meaning their range is shorter. A factor of ~1 means reliable detection of stainless steel targets.

Embedded Installation Capability: Can be mounted flush (level) in a metal bracket without affecting its sensing performance, simplifying mechanical design.

Short-Circuit and Reverse Polarity Protection: Built-in electronic protection safeguards the sensor from accidental wiring errors and electrical faults, preventing damage and increasing longevity.

LED Status Indicator: Integrated red LED provides clear visual confirmation of the switching state and power, aiding in setup and troubleshooting.

Extremely Rugged Construction: Features a stainless steel housing (V4A / 316L) and a PTFE sensing face, making it highly resistant to corrosion, chemicals, oils, coolants, and mechanical wear. This is its defining characteristic.

Weld-Field Immune: Designed to operate reliably in areas with strong electromagnetic interference, such as near resistance welding equipment.

3. Technical Specifications
Operating Principle: Inductive

Sensing Target: Metallic objects (Ferrous and non-ferrous, optimized for steel and stainless steel)

Housing: Cylindrical, M12 x 1 threaded barrel

Sensing Distance (Sn): 4 mm (for mild steel)

Non-Ferrous Factor: ~1 (for stainless steel)

Output Type: PNP, Normally Open (NO)

Connection: 4-pin M12 quick-disconnect connector

Supply Voltage: 10...30 V DC

Switching Frequency: 2 kHz

Housing Material: Stainless Steel (V4A / 316L)

Sensing Face Material: PTFE (Teflon)

Ingress Protection Rating: IP68 and IP69K. This rating is exceptional, meaning it is dust-tight, protected against prolonged immersion in water (IP68), and can withstand high-pressure, high-temperature jet cleaning (IP69K).