Metal Detectors

Advanced Digital Phase-Shift Detection Technology

JM Industrial Metal Detectors utilize modular differential transformer sensors and digital phase-shift correlation technology to deliver ultra-stable detection performance with unmatched sensitivity and material immunity. Designed for harsh industrial environments, our systems provide reliable ferrous/non-ferrous metal detection while effectively suppressing false triggers from mineralized materials.

Industry Applications

Industry Target Metals

Cement Tramp iron in limestone

Mining Drill bits in coal

Food Metal fragments in flour

Recycling Non-ferrous contaminants

Core Technology & Operation

✔ Digital Phase-Shift Detection

Detection Principle: Measures phase distortion when metals disrupt electromagnetic field

Signal Processing: 32-bit DSP analyzes amplitude/phase changes with 0.1° resolution

Auto-Calibration: Compensates for belt speed (0.1–6 m/s) and material effects

✔ Multi-Layer Interference Immunity

Frequency Synchronization: Avoids EMI from VFDs/motors

Dynamic Threshold Adjustment: Ignores product effects (cement, coal, etc.)

Moisture Compensation: Stable performance in wet materials

Technical Specifications

Detection Sensitivity Ferrous: Φ0.3mm Non-Ferrous: Φ1.2mm (SUS304)

Belt Width： 300–2,400mm

Output Relay： 1NO+1NC (5A/250VAC)

Delay Time： 1–10s programmable

IP Rating： IP65 (control unit) / IP67 (sensor)

Communication： RS485 Modbus RTU / 4-20mA