MEMS vibration sensor AKM390

for heavy machineryfor vibration meterfor preventive maintenance

Product Overview
The AKM390 is a three‑axis MEMS capacitive vibration sensor with an analog 0–5 V voltage output for industrial vibration and shock measurement. It integrates a single‑crystal silicon MEMS element, a low‑power ASIC for signal conditioning, a microcontroller for compensation storage and a temperature sensor. The sensor is factory calibrated, low power and designed for stable, repeatable output with solid‑state reset and over‑voltage protection. The aerospace‑grade aluminum housing is rated IP67 and is suitable for field monitoring and portable test systems.

Key Features

• Measurement axes: X, Y, Z (triaxial)
• Output: 0–5 V analog voltage
• Supply voltage: 9–36 VDC
• Operating temperature: -40 ℃ to +85 ℃
• Shock resistance: 100 g @ 11 ms (triaxial, half‑sine); up to 2000 g noted for selected ranges
• Vibration tolerance: 20 g RMS, 20–2000 Hz (random), 30 min per axis
• Protection: IP67; housing in aerospace aluminum
• Low operating current:

Applications

• Crash/impact recording, fatigue monitoring and prediction
• Wind turbine condition monitoring
• Transport infrastructure monitoring: subgrade analysis, high‑speed rail fault detection
• Large machinery and engine vibration monitoring
• Low‑frequency vibration and automatic monitoring systems
• Medical equipment monitoring
• Bridge structural health monitoring
• Automotive on‑board testing and measurements
• Roller and rotary equipment monitoring

Parameters
AKM390 Parameter Unit
Measure range ±2 ±4 ±8 ±10 ±20 ±40 g
Deviation calibration Measure axis X,Y,Z X,Y,Z X,Y,Z X,Y,Z X,Y,Z X,Y,Z axis
Power on/off repeatability Sensitivity (±10%) 1250 625 312.5 250 125 62.5 mv/g
Temp. coefficient of deviation 0.01 0.01 0.01 0.05 0.05 0.05 %/℃
Resolution/Threshold (@ 1Hz) < 1 < 1 < 1 < 1 < 1 < 1 mg(max)
Nonlinearity Response frequency 500 500 500 500 500 500 Hz
Bandwidth (3DB) 1000 1000 1000 1000 1000 1000 Hz
Cross-axis sensitivity 1 1 1 2 2 2 %
Lateral Vibration Sensitivity Ratio 1 1 2 5 5 5 %
Resonant frequency 2.4 2.4 2.4 5.5 5.5 5.5 kHz
Noise density 21 21 21 86.6 86.6 86.6 μg/√Hz
0 G Output 2.5V Output voltage 0~5V
Input (VDD _ VSS) 9-36 VDC
Operating current consumption Protection IP67
Material aerospace aluminum
Weight Product net weight: ≤116g, magnetic base: ≤50g
Size Product size: L36 × W32 × H24mm
Size of magnetic adsorption base plate: L36 × W32 × H8.1mm

Dimensions & Mounting

• Sensor body: L36 × W32 × H24 mm
• Mounting footprint: L29 × 25 × 4 mm
• Mounting screws: 4 × M4
• Magnetic base (optional): L36 × W32 × H7 mm

Technical specifications

• Model family: AKM390
• Axes: triaxial (X, Y, Z)
• Output type: analog voltage 0–5 V
• Supply voltage: 9–36 VDC
• Operating current:
• Temperature range: -40 ℃ to +85 ℃ (operating and storage)
• IP rating: IP67
• Material: aerospace aluminum
• Weight: sensor ≤116 g; magnetic base ≤50 g
• Sensitivity options: 1250 to 62.5 mV/g
• Bandwidth/response: up to 1000 Hz bandwidth, 500 Hz response (typ.)
• Calibration: factory calibrated; bias calibration