MEMS vibration sensor GKM398

capacitivefor machine monitoringfor machine condition monitoring

Product Introduction
The GKM398 triaxial accelerometer series, developed by RUICOM Technology, is designed for industrial vibration and shock measurement, impact testing and multi-point monitoring. The sensor features an analog current output (4–20 mA), configurable address codes and supports long-distance series connection of multiple units for distributed measurement and centralized data acquisition.

Key Features

• Analog current output interface (4–20 mA)
• Vibration frequency range: 10–2000 Hz, test level up to 10 g
• Shock tolerance: 100 g @ 11 ms, triaxial (half-sine)
• Robust mechanical structure and long-term output stability

Performance Parameters (summary)
Model: GKM398
Measurement Range (g): ±2 | ±4 | ±8 | ±10 | ±20 | ±40
Bias Calibration (mg): <1 | <1 | <1 | <1 | <1 | <1
Measurement Axis: X, Y, Z
Upward/Power-Off Repeatability (mg max): <2
Sensitivity (±10%) (mA/g): 4 | 2 | 1 | 0.8 | 0.4 | 0.2
Bias Temperature Coefficient (%/°C): 0.01 | 0.01 | 0.01 | 0.05 | 0.05 | 0.05
Resolution/Threshold (@1 Hz) (mg max): <1
Nonlinearity (% FS max): <1
Response Frequency (Hz): 500
Bandwidth (3 dB) (Hz): 1000
Cross-Axis Sensitivity (%): 1 | 1 | 1 | 2 | 2 | 2
Transverse Vibration Sensitivity Ratio (%): 1 | 1 | 2 | 5 | 5 | 5
Resonant Frequency (kHz): 2.4 | 2.4 | 2.4 | 5.5 | 5.5 | 5.5
Noise Density (µg/√Hz): 21 | 21 | 21 | 86.6 | 86.6 | 86.6
0g Output 12 mA (mA): <0.005 | <0.005 | <0.005 | <0.003 | <0.003 | <0.003
Output Current: 4–20 mA
Input (VDD_VSS): 9–36 VDC
Operating Current Consumption: <60 mA @ 12 VDC
Protection Class: IP67
Material: Aerospace Aluminum
Weight: Net Weight ≤116 g; Magnetic Base ≤50 g
Product Dimensions: L36 × W32 × H24 mm; Magnetic Base Dimensions: L36 × W32 × H8.1 mm
Note: Do not use beyond the specified range for extended periods.

Technical specifications

• Model: GKM398
• Type: Triaxial MEMS accelerometer with analog current output (4–20 mA)
• Sensing technology: Single-crystal silicon capacitive sensing
• Measurement ranges: ±2, ±4, ±8, ±10, ±20, ±40 g
• Axes: X, Y, Z (triaxial)
• Sensitivity options (mA/g): 4 / 2 / 1 / 0.8 / 0.4 / 0.2
• Frequency response: 500 Hz (response), 1000 Hz (3 dB bandwidth)
• Shock tolerance: 100 g @ 11 ms (triaxial, half-sine)
• Output current: 4–20 mA (0 g output nominal 12 mA)
• Supply voltage: 9–36 VDC
• Operating current: <60 mA @ 12 VDC
• Protection rating: IP67
• Material: Aerospace aluminum housing
• Weight: net ≤116 g; magnetic base ≤50 g
• Dimensions: sensor L36 × W32 × H24 mm; magnetic base L36 × W32 × H8.1 mm
• Calibration & stability: factory calibration, low bias and nonlinearity <1% FS