Product Introduction
The DAIDISIKE DC two-wire inductive proximity sensor series is a non-contact detection device designed for industrial automation. This series includes M8, M12, M18, and M30 size models, supporting DC two-wire power supply, suitable for detecting metal objects such as iron, steel, aluminum, and other non-magnetic metals. The DAIDISIKE brand is renowned for its high reliability, durability, and cost-effectiveness. These sensors are widely used in mechanical manufacturing, assembly lines, robotic arms, conveyor systems, and other fields. The sensors feature a nickel-plated brass housing with IP67 protection rating, enabling stable operation in harsh environments such as humidity, dust, or vibration. Output types include normally open (NO) and normally closed (NC), facilitating integration into PLC or control systems. Compared to three-wire or four-wire sensors, the two-wire design simplifies wiring, reduces installation costs, while maintaining high-precision detection.
The key advantages of this series include: extended sensing range (from 1mm to 15mm depending on the model), LED indicator for status monitoring, short-circuit protection, and reverse polarity protection. DAIDISIKE ensures products comply with international standards such as CE certification and offers 2-meter cable or M12 connector options. Users can choose flush or non-flush mounting based on application needs to optimize detection performance.
Specifications Table
The following is a detailed specifications table for the DAIDISIKE DC two-wire inductive proximity sensor series, organized by size:
| Parameter | M8 | M12 | M18 | M30 |
|---|
| Model Size | M8 | M12 | M18 | M30 |
| Housing Material | Nickel-plated brass | Nickel-plated brass | Nickel-plated brass | Nickel-plated brass |
| Sensing Distance (Flush) | 1-2mm | 2-4mm | 5-8mm | 10-15mm |
| Sensing Distance (Non-Flush) | 1.5-3mm | 3-6mm | 7.5-12mm | 15-22mm |
| Supply Voltage | 10-30V DC | 10-30V DC | 10-30V DC | 10-30V DC |
| Current Consumption | ≤10mA | ≤10mA | ≤10mA | ≤10mA |
| Load Current | 5-200mA | 5-200mA | 5-200mA | 5-200mA |
| Switching Frequency | 2000Hz | 1500Hz | 1000Hz | 500Hz |
| Output Type | NO/NC (optional) | NO/NC (optional) | NO/NC (optional) | NO/NC (optional) |
| Protection Rating | IP67 | IP67 | IP67 | IP67 |
| Operating Temperature | -25°C to +70°C | -25°C to +70°C | -25°C to +70°C | -25°C to +70°C |
| Connection Method | 2m cable / M12 connector | 2m cable / M12 connector | 2m cable / M12 connector | 2m cable / M12 connector |
| Repeat Accuracy | ≤5% | ≤5% | ≤5% | ≤5% |
| Dimensions (Length) | 40-50mm | 50-60mm | 60-70mm | 70-80mm |
| Weight | Approx. 20g | Approx. 50g | Approx. 100g | Approx. 150g |
| Certifications | CE, RoHS | CE, RoHS | CE, RoHS | CE, RoHS |
Note: Specifications may vary slightly by specific model; please refer to the product manual for exact values. Sensing distance is for standard iron targets (size twice the sensing distance).
Technical Parameters
The technical parameters of the DAIDISIKE DC two-wire inductive proximity sensors are as follows, ensuring high performance and reliability in industrial environments:
- Supply Voltage Range: 10-30V DC, supporting ripple (p-p) ≤10%, suitable for most industrial power systems.
- Leakage Current: ≤1mA in no-load state, energy-efficient.
- Voltage Drop: ≤3.5V, ensuring stable output under load.
- Hysteresis: 3-20% of sensing distance, preventing false triggers and improving detection accuracy.
- Temperature Drift: ≤±10% (within -25°C to +70°C range), adapting to temperature variations.
- Shock and Vibration Resistance: Compliant with IEC 60947-5-2, vibration 10-55Hz, shock 30g.
- Electromagnetic Compatibility: Anti-EMI, compliant with EN 61000 standards.
- Sensing Head Material: PBT plastic, resistant to corrosion and mechanical damage.
- LED Indication: Yellow LED for output status display, convenient for on-site debugging.
- Short-Circuit Protection: Built-in, preventing overload damage.
- Reverse Polarity Protection: Yes, ensuring installation errors do not damage the sensor.
- Response Time: ≤1ms, suitable for high-speed applications.
- Target Material: Ferromagnetic and non-ferromagnetic metals, with correction factors for different materials (e.g., stainless steel 0.7, aluminum 0.4).
These parameters are based on industry standards and verified through rigorous testing, ensuring long-term stable operation of DAIDISIKE sensors in automated production lines.
Working Principle
The working principle of the DAIDISIKE DC two-wire inductive proximity sensor is based on electromagnetic induction. Specifically, the sensor contains a high-frequency oscillation circuit internally, which generates an alternating magnetic field. When a metal object (target) enters the sensor's sensing area, eddy currents are induced in the target, altering the impedance and amplitude of the oscillation circuit. The sensor detects this change and, through an internal amplifier and comparator circuit, converts the signal into a switch output.
Detailed process:
1. Oscillator Generates Magnetic Field: The front-end coil of the sensor produces a high-frequency magnetic field (typically several hundred kHz).
2. Target Approaches: The metal object enters the magnetic field, absorbs energy, and generates eddy currents, causing field attenuation.
3. Detects Change: The oscillator's amplitude or frequency change is captured by the detection circuit.
4. Signal Processing: Through threshold comparison, outputs a switch signal (NO or NC).
5. Two-Wire Design: Power and signal are transmitted via the same pair of wires, simplifying the circuit; the load is connected in series in the power loop, and when the sensor activates, current changes drive the load.
This non-contact detection avoids mechanical wear, enhancing lifespan (typically over 10^7 operations). In professional terms, this is an "Inductive Proximity Sensor," compliant with IEC 60947-5-2 standards, commonly used for "Position Sensing" and "Presence Detection." Compared to capacitive sensors, inductive ones are better suited for metal targets and unaffected by dust or liquids.
