4 Wire Type

A 4-wire capacitive proximity sensor detects objects by measuring changes in capacitance. It features two power wires (10–30V DC) and two output wires (NPN/PNP transistor, NO/NC) with a sensing range of 8–15 mm. Key specs include IP68 protection, 1 kHz switching frequency, 300 mA load capacity, and short-circuit/polarity protection. Ideal for detecting non-metallic materials in industrial automation, liquid level control, and harsh environments.

Typical Applications

  • Liquid level detection (tanks, pipelines).

  • Material presence sensing (plastic, glass, wood, or granular substances).

  • Industrial automation (conveyors, packaging machines).

Connection Example

  • Power: Brown (+V), Blue (GND).

  • Output:

    • NPN Type: Black (NO) connects to load; White (NC) optional.

    • PNP Type: Black (NO) supplies +V when active.

Always verify wiring with the manufacturer’s diagram!

Advantages

  • Works with non-metallic objects (unlike inductive sensors).

  • IP68 rating suits washdown/outdoor environments.

  • Low power consumption and robust construction.

Key Features & Specifications

  1. Wiring Configuration:

    • 4 Wires:

      • 2 Power Wires: 10–30V DC (Typically Brown = +V, Blue = GND).

      • 2 Output Wires: NPN/PNP transistor output (Black = NO, White = NC, or similar; check datasheet).

  2. Detection Range:

    • Rated Switching Distance: 8–15 mm (adjustable via potentiometer, if available).

    • Hysteresis: 5–10% of sensing distance (prevents output chatter near threshold).

    • Repeatability: 5–10% of sensing distance (consistent detection accuracy).

  3. Electrical Ratings:

    • Operating Voltage: 10–30V DC (wide range for industrial use).

    • Current Consumption: <10 mA (low power).

    • Switching Current: Max 300 mA (for driving relays/PLCs).

    • Short Circuit & Polarity Protection: Built-in (enhanced durability).

  4. Performance:

    • Switching Frequency: 1 kHz (fast response for high-speed applications).

    • Status Indicator: LED (visual feedback for detection/power).

  5. Mechanical & Environmental:

    • Housing Material: Chrome-plated brass (corrosion-resistant).

    • Protection Class: IP68 (dust/waterproof for harsh environments).

    • Mounting: Non-flush (sensor face must protrude for optimal detection).

  6. Cable & Customization:

    • Standard: 4-core, 2-meter cable (custom lengths available).