Technical Datasheet: YHKJ SN04-N2 Inductive Proximity Sensor
This proximity sensor is designed for non-contact detection of metallic objects in industrial automation applications. It features a compact rectangular design with a built-in LED indicator for status monitoring.
1. General Specifications
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Brand: YHKJ
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Model Number: SN04-N2
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Sensor Type: Inductive Proximity Switch
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Detection Object: Metal (Iron, Steel, Copper, Aluminum, etc.)
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Housing Material: Heat-resistant ABS (Plastic)
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Indicator: Red LED (Lights up when an object is detected)
2. Electrical Characteristics
| Parameter | Value |
| Operating Voltage | 10–30V DC |
| Output Type | NPN |
| Output State | Normally Closed (NC) |
| Current Output | Max 200–300mA |
| Polarity Protection | Integrated |
3. Detection & Performance
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Sensing Distance: Typically 4mm–5mm (depending on target material and size).
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Response Frequency: Approx. 500Hz.
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Hysteresis: <10% of sensing distance.
4. Wiring Configuration (3-Wire System)
The SN04-N2 follows standard industrial color-coding for its cable:
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BN (Brown): Positive Power Supply (+10V to +30V DC)
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BU (Blue): Negative Power Supply (0V / Ground)
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BK (Black): Output Signal (Connects to Load/Controller)
5. Mechanical Dimensions & Installation
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Shape: Rectangular (Block type).
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Mounting: Front-facing sensing head with two mounting holes for M3 or M4 screws.
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Protection Rating: Usually IP67 (Dust tight and protected against water immersion).
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