MEMS vibration sensor GKG3

capacitivefor machine monitoringfor machine condition monitoring

Product Introduction
The GKG3 triaxial accelerometer series is a multi-axis MEMS accelerometer family developed by RUICOM Technology for vibration detection and shock testing. The series supports selectable digital outputs (RS232, RS485 or TTL) and configurable address codes, enabling long-distance serial networking of multiple sensors for multi-point synchronous measurement and centralized data analysis. A built-in FFT processing unit provides direct outputs of vibration frequency, velocity and amplitude for faster data analysis. Sampling frequency can be adjusted dynamically to match the measured object's frequency and improve measurement accuracy. The GKG392 variant adopts single-crystal silicon capacitive sensing technology and integrates a micromachined silicon sensing chip, a low-power ASIC for signal conditioning, a microprocessor storing temperature compensation data and an internal temperature sensor. The product offers low power consumption, factory calibration, a mechanical design for industrial use, solid-state power-on reset, overvoltage protection and long-term scale-factor deviation better than 0.1%.

Main Features

• Selectable digital outputs: RS232 / RS485 / TTL
• Vibration measurement range: 10–2000 Hz; measurement ranges up to ±40 g depending on model
• Shock tolerance: 100 g @ 11 ms, triaxial (half-sine)
• Built-in FFT processing: direct output of frequency, velocity and amplitude
• Configurable address code for multi-sensor serial networking and multi-point synchronous measurement
• Serial output auto rates: 5, 10, 25, 50, 100, 200, 500, 1000 Hz
• IP67 rated enclosure; aerospace aluminum housing with optional stainless-steel magnetic base

Performance Parameters (table rows)

• Model: GKG3
• Parameter: Measurement ranges — ±2 g; ±4 g; ±8 g; ±10 g; ±20 g; ±40 g
• Bias calibration (mg) — <1 mg for all ranges
• Measurement axis — X, Y, Z (triaxial)
• Power-on / upward repeatability (mg, max) — <2 mg for all ranges
• Temperature coefficient of bias (mg/°C, typical) — 0.15 (lower ranges) / 0.75 (higher ranges)
• Resolution / threshold (@1 Hz, mg, max) — <1 mg
• Nonlinearity (% FS, max) — <1% FS
• Bandwidth (3 dB) — 500 Hz
• Cross-axis sensitivity (%) — 1% (some ranges) / 2% (higher ranges)
• Lateral vibration sensitivity ratio (%) — 1%–5% depending on range
• Noise density (μg/√Hz) — 21 (lower ranges); 86.6 (higher ranges)
• Resonant frequency (kHz) — 2.4 kHz (lower ranges); 5.5 kHz (higher ranges)
• Output interface — RS232 / TTL / RS485
• Communication protocol — serial protocol and MODBUS RTU
• Input voltage (VDD_VSS) — 9–36 VDC
• Operating current — <60 mA @ 12 VDC
• Protection class — IP67
• Material — housing: aerospace aluminum; magnetic base: stainless steel
• Weight — product net weight ≤ 116 g; magnetic base ≤ 50 g
• Dimensions — product: L36 × W32 × H24 mm; magnetic base: L36 × W32 × H8.1 mm
• Note: Do not operate continuously beyond the specified measurement range.