MEMS vibration sensor GKM390

for machine monitoringfor preventive maintenancefor vibration meter

Product introduction
The GKM390 triaxial accelerometer is a high-performance MEMS sensor developed for industrial vibration monitoring, shock testing and distributed measurement systems. It provides analog 0–5 V voltage output, address encoding for multi-device cascading, and is optimized for low power consumption and long-term stability. The sensor features aerospace-grade aluminum housing and IP67 protection for harsh environments.

Key features

• Analog voltage output interface (0–5 V)
• Vibration bandwidth: 10–2000 Hz; selectable measurement ranges up to ±40 g
• Shock resistance: 100 g @ 11 ms (triaxial, half-sine)
• Address encoding for cascading and distributed network measurement

Performance parameters (summary)
Model: GKM390
Measurement range options: ±2 g, ±4 g, ±8 g, ±10 g, ±20 g, ±40 g
Bias calibration: <1 mg (for ranges up to ±40 g)
Measurement axis: X, Y, Z (triaxial)
Upward/power-off repeatability: <2 mg (max)
Sensitivity (±10%): 1250, 625, 312.5, 250, 125, 62.5 mV/g (range-dependent)
Bias temperature coefficient: 0.01%/℃ (lower ranges) up to 0.05%/℃ (higher ranges)
Resolution/threshold (@1 Hz): <1 mg (max)
Nonlinearity: <1 %FS (max)
Response frequency: 500 Hz
Bandwidth (3 dB): 1000 Hz
Cross-axis sensitivity: 1% (lower ranges) up to 2% (higher ranges)
Transverse vibration sensitivity ratio: 1%–5% depending on range
Resonant frequency: 2.4 kHz (lower ranges) up to 5.5 kHz (higher ranges)
Noise density: 21–86.6 μg/√Hz (range-dependent)
0 g output: ~2.5 V offset
Output voltage: 0–5 V (analog)
Input (VDD_VSS): 9–36 VDC
Operating current: <60 mA @ 12 VDC
Protection class: IP67
Material: Aerospace aluminum housing
Weight: Net ≤116 g; magnetic base ≤50 g
Dimensions: Product L36 × W32 × H24 mm; magnetic base L36 × W32 × H8.1 mm
Note: Avoid continuous operation beyond specified measurement ranges.

Technical specifications

• Model: GKM390
• Type: Triaxial MEMS accelerometer, analog voltage output
• Measurement ranges: ±2 / ±4 / ±8 / ±10 / ±20 / ±40 g
• Output: 0–5 V analog; 0 g output ≈ 2.5 V
• Supply voltage: 9–36 VDC
• Current consumption: <60 mA @ 12 VDC
• Bandwidth: 1000 Hz (3 dB)
• Frequency response: 500 Hz
• Resonant frequency: 2.4–5.5 kHz (range-dependent)
• Sensitivity: range-dependent (62.5–1250 mV/g nominal, ±10%)
• Noise density: 21–86.6 μg/√Hz (range-dependent)
• Bias stability / repeatability: <2 mg (power-off/up repeatability)
• Nonlinearity: <1 %FS
• Cross-axis sensitivity: 1–2%
• Shock resistance: 100 g @ 11 ms (triaxial, half-sine)
• Protection rating: IP67
• Material: Aerospace aluminum
• Weight & dimensions: Net ≤116 g; product L36×W32×H24 mm; magnetic base L36×W32×H8.1 mm