Technical Specifications Applicable Probe: Bently 3309 series proximity probe Power Supply: -24V DC Output Signal: Linear gap voltage signal Operating Temperature: -40℃ ~ +70℃ Mounting: Bracket mounting Housing: Cast aluminum alloy shielding housing
Functional Features Special high-frequency excitation generation for 3309 series eddy current probe. Convert probe impedance change into linear analog voltage output. Built-in self-diagnosis function to detect probe cable open and short circuit. Metal housing for anti-electromagnetic interference. Stable performance under long-term continuous industrial operation. Screw terminals for power, probe input and signal output.
Application Scenarios Pre-amplification unit for Bently 3309 eddy current probe measuring circuit. Shaft vibration and thrust displacement monitoring of turbine and compressor. Power plant rotating machinery online protection system. Petrochemical plant critical equipment condition monitoring. Non-contact gap measurement of heavy rotating rotors.
Performance Parameters Signal linearity: Consistent with matched 3309 probe calibration curve Loop fault diagnosis: Real-time detection of probe circuit failure Anti-interference: Metal housing suppresses external electromagnetic noise
Structural Characteristics Cast aluminum alloy sealed housing with mounting ears. Internal PCB integrated oscillator, signal conditioning and diagnostic circuit. Screw terminals for power supply, probe signal and output signal. Cable entry holes for field wiring. Shielded structure to reduce external interference.
Working Principle The oscillator circuit generates high-frequency alternating signal to drive 3309 series probe coil. Eddy current effect changes coil impedance with rotor gap. The conditioning circuit converts impedance variation into linear voltage signal proportional to gap. The diagnostic circuit continuously monitors the probe loop status and reports cable faults.
Installation Requirements Mount the proximitor on rigid flat bracket. Connect probe extension cable to signal terminals following wiring schematic. Supply -24V DC power to power terminals correctly. Connect housing protective ground reliably. Separate signal wiring from high voltage power cables. Check output voltage and loop status after power on.
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