Impedance vibration sensor AKG392

for machine monitoringfor machine condition monitoringfor general purposes

Product description
The AKG392 is a triaxial MEMS vibration sensor with digital output designed for vibration and impact measurement. It provides selectable interfaces (RS232, RS485, TTL) and supports configurable address codes so multiple units can be chained for long-distance, multi-point monitoring and data collection. Internal FFT processing enables direct output of vibration frequency, velocity and amplitude. Sampling frequency is adjustable to match measured signal content and improve frequency measurement accuracy. The sensor is based on a single-crystal silicon capacitive element, a low-power ASIC for signal conditioning, a microprocessor storing compensation values and an integrated temperature sensor.

Applications

• Roller and compactor vibration monitoring
• Bridge and structural monitoring
• Wind-turbine condition and safety monitoring
• General vibration/impact testing and multi-point data acquisition

Performance (selected parameters)
Range: ±2, ±4, ±8, ±10, ±20, ±40 g
Bias calibration: <1 mg (typical)
Measurement axes: X, Y, Z (triaxial)
Bandwidth (3 dB): 500 Hz
Output (sampling) rates: 5, 10, 25, 50, 100, 200, 500, 1000 Hz (selectable)
Output interface: RS232 / RS485 / TTL
Protocols: RION 68 protocol; MODBUS RTU
Impact resistance: 100 g @ 11 ms (3 axial, half-sine)
Recovery time: <1 ms (1000 g, 1/2 sin 1 ms)
Operating voltage: 9–36 VDC
Operating current: <60 mA @ 12 VDC
Connector: M12 industry standard
Typical long-term scale factor deviation: <0.1%

Dimensions

• Product: 34.3 × 34.3 × 38.5 mm (L × W × H)
• Magnetic base: 34.23 × 34.23 × 6 mm
• L-shaped adapter plate: 36 × 44 × 15 mm
• Mounting: 4 × M3 screws; installation size L25.2 × W25.5 × H1.5 mm

Technical specifications

• Model: AKG392 triaxial MEMS accelerometer
• Measurement axes: X, Y, Z
• Selectable measurement ranges: ±2, ±4, ±8, ±10, ±20, ±40 g
• Resolution/threshold (@1 Hz): <1 mg (max)
• Non-linearity: typically <0.5% to <1% FS depending on range
• Cross-axis sensitivity: ~1–5% depending on range
• Resonance frequency: ~2.4 kHz (low ranges), ~5.5 kHz (high ranges)
• Noise density: ~21 μg/√Hz (low ranges) to ~86.6 μg/√Hz (high ranges)
• Protocols supported: RION 68; MODBUS RTU
• Weight (net): 82 g (magnetic base 48 g; L-adapter 20 g)