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AL20E-NM111

The SICK AL20E-NM111 is a versatile, short-range, non-contact inductive proximity sensor. It is designed for the reliable detection of metallic objects (primarily ferrous metals like steel and iron) in a wide array of industrial automation applications. Its robust design and dependable performance make it a fundamental component for position sensing, end-of-travel checking, and counting tasks.

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Key Features
Non-Contact Detection: Provides wear-free operation compared to mechanical switches, leading to higher longevity and reliability.

Embedded Mounting Capability: Can be mounted flush (level) in a metal bracket without any reduction in its specified sensing range, simplifying mechanical design and installation.

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

LED Status Indicator: An integrated red LED provides clear visual confirmation of the switching state (target detection) and power status, aiding immensely in setup, commissioning, and troubleshooting.

Rugged Housing: Features a robust nickel-plated brass housing and a PTFE (Teflon) sensing face, offering good resistance to many industrial chemicals, oils, and coolants.

Extended Temperature Range: Suitable for operation in a wide range of ambient temperatures.

3. Technical Specifications
Operating Principle: Inductive

Sensing Target: Metallic objects (Best for ferrous metals; sensing distance reduces for non-ferrous metals like aluminum or copper).

Housing: Cylindrical, M20 x 1 threaded barrel

Sensing Distance (Sn): 5 mm (for mild steel)

Output Type: NPN, Normally Open (NO) (The "N" in "NM111" typically indicates NPN output).

Connection: 3-pin M12 quick-disconnect connector

Supply Voltage: 10...30 V DC

Switching Frequency: 1 kHz

Housing Material: Nickel-plated brass

Sensing Face Material: PTFE (Teflon)

Ingress Protection Rating: IP67 (Dust-tight and protected against temporary immersion in water), making it suitable for most industrial environments.