The Leuze Series 218 inductive proximity sensors, featuring models IS 218MM/2NO-8E0 (NPN Normally Open - NO, Part Number: 50109695) and IS 218MM/4NO-8E0 (PNP Normally Open - NO, Part Number: 50109697), are high-precision non-contact metal detection switches manufactured by Leuze electronic (Germany). Constructed with a heavy-duty M18 cylindrical nickel-plated brass casing and offering an extended flush scanning range of 8 mm, these sensors deliver superior accuracy, mechanical protection, and long-term durability across challenging automated industrial processes.

KEY PRODUCT FEATURES AND OPERATIONAL ADVANTAGES:
1. Extended 8 mm Operating Range – Flush / Embedded Installation (-8E0):
Features an extended nominal sensing range Sn of 8 mm even when fully embedded into metallic surrounding structures (assured operating range Sa: 0 to 6.4 mm). The flush-mountable construction shields the active sensing face against direct physical impacts and saves critical installation space.
2. Dual Output Switching Configurations (NPN / PNP Options):
• Model IS 218MM/2NO-8E0: Transistor NPN, Normally Open (NO).
• Model IS 218MM/4NO-8E0: Transistor PNP, Normally Open (NO).
Enables direct interface compatibility with all standard PLC architectures (Siemens, Mitsubishi, Omron, Delta, Schneider, etc.).
3. High Switching Frequency 1,500 Hz (1.5 kHz) & Fast Response:
With a rapid switching rate of 1,500 operations per second, it is ideally suited for motor shaft rotation monitoring, gear tooth counting, conveyor parts indexing, and high-frequency pulse generation without missing counts.
4. Nickel-Plated Brass Shell with PBT Sensing Face:
The precision-machined M18x1 mm threaded barrel is crafted from rugged nickel-plated brass paired with a wear- and chemical-resistant Polybutylene (PBT) sensing cap. Rated IP67 for water and dust ingress protection, it operates reliably across -25 °C to +70 °C with an outstanding 900-year MTTF rating.
5. Flexible 2m PVC Cable Connection:
Equipped with a 2,000 mm (2 m) oil-resistant 3-wire PVC cable, ensuring dependable electrical signal transmission and high mechanical flexibility inside machinery drag chains.
6. Comprehensive Protective Electronics & Yellow Status LED:
Equipped with built-in output short-circuit protection, reverse power polarity protection, and inductive transient suppression. A bright yellow status LED at the rear delivers clear visual confirmation of switching output states during alignment and diagnostics.

TYPICAL INDUSTRIAL APPLICATIONS:
• CNC Machine Tools & Precision Mechanics: X/Y/Z-axis travel limit sensing, hydraulic chuck indexing, and automatic tool clamping confirmation.
• Automated Conveyor & Packaging Lines: Aluminum can counting, metallic bottle cap sensing, and high-speed component carrier tracking.
• Automotive Manufacturing & Robotic Welding: Fixture clamping verification, robot arm end-position sensing, and chassis alignment on assembly lines.
• Stamping Presses & Plastic Injection Molding: Die open/close limit monitoring and pneumatic/hydraulic cylinder stroke tracking.

• Manufacturer: Leuze electronic
• Series: Series 218 (Standard Cylindrical M18)
• Brand Origin: Germany
• Models & Part Numbers:
  - Model IS 218MM/2NO-8E0 (Part Number: 50109695) - NPN NO Output
  - Model IS 218MM/4NO-8E0 (Part Number: 50109697) - PNP NO Output
• Sensor Type: Inductive proximity switch
• Housing Design: Cylindrical threaded
• Dimensions (Diameter x Length): Ø 18 mm x 52 mm
• Thread Size: M18 x 1 mm
• Installation Type: Embedded / Flush mounting
• Nominal Operating Range Limit (Sn): 8 mm
• Assured Operating Range (Sa): 0 ... 6.4 mm
• Standard Target Plate: 24 x 24 mm², Fe360 steel
• Material Correction Factors:
  - Fe360 Steel: 1.0
  - Stainless Steel: 0.7
  - Brass: 0.5
  - Aluminum: 0.4
  - Copper: 0.4
• Switching Hysteresis: 10 %
• Repeatability: Max. 5 % (at Ta = 23 °C ± 5 °C)
• Temperature Drift: Max. 10 % (over entire operating span)
• Max. Switching Frequency: 1,500 Hz (1.5 kHz)
• Readiness Delay: 60 ms
• Supply Voltage (UB): 10 ... 30 V DC (Residual ripple 0 ... 20%)
• Open-Circuit Current: 0 ... 10 mA
• Digital Switching Outputs: 1 output
• Switching Output Types:
  - IS 218MM/2NO-8E0: Transistor NPN
  - IS 218MM/4NO-8E0: Transistor PNP
• Switching Principle: NO (Normally Open)
• Max. Switching Current: 200 mA
• Voltage Drop: ≤ 2 V DC
• Residual Current: Max. 0.1 mA
• Protective Circuitry: Polarity reversal protection, short-circuit protection, inductive kickback protection
• Status Indicator: 1 yellow LED indicating switching output state
• Connection Type: 2,000 mm (2 m) PVC gray cable
• Number of Conductors: 3-wire (conductor cross section 0.34 mm²)
• Housing Material: Nickel-plated brass
• Sensing Face Material: Polybutylene terephthalate (PBT)
• Housing Colors: Silver / Red RAL 3000
• Net Weight: 110 g
• Degree of Protection: IP 67 (Water and dust tight)
• Protection Class: Class II
• Reliability (MTTF): 900 years
• Ambient Operating Temperature: -25 °C ... +70 °C
• Storage Temperature: -25 °C ... +70 °C
• EMC Standards: IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4
• Product Standards & Approvals: IEC 60947-5-2, cULus Listed