MEMS vibration sensor GKC378

for machine monitoringfor preventive maintenancefor vibration meter

Product Introduction
The GKC378 is a triaxial vibration sensor based on monocrystalline-silicon MEMS capacitive sensing technology. It provides a DC-coupled 4–20 mA analog current output and integrates low-noise capacitive sensing elements with on-board signal conditioning and compensation to minimize temperature drift and process variation effects. The device features low-power design, EMC/RFI shielding and a built-in self-test for verification of sensing elements and downstream signal chain. Typical applications include industrial equipment vibration monitoring, structural health assessment and motion control.

Key Features

• Triaxial MEMS vibration sensor (X, Y, Z axes)
• DC-coupled 4–20 mA current output compatible with industrial loop devices
• Configurable measurement ranges: ±2 g, ±4 g, ±8 g, ±16 g (factory set)
• Frequency response optimized for static and low-frequency dynamic measurements (0–200 Hz)
• Built-in self-test for on-site verification
• IP67 environmental protection and integrated EMC/RFI shielding

Performance Parameters

• Model: GKC378
• Measurement range: ±2 g ~ ±16 g (configurable)
• Measuring axes: X, Y, Z (triaxial)
• Resolution: < 1 mg
• Zero-point (no-load) output: 12 mA (current)
• Full-range output: 4–20 mA (current)
• Linearity: 1%
• Power-on/power-off repeatability: < 2 mg
• Response frequency: 0–200 Hz (integrated low-pass filter)
• Bandwidth: 200 Hz @ 3 dB
• Shock: > 100 g @ 11 ms (half-sine)
• Shock recovery time: < 1 ms
• Operating temperature: -40 to +85 °C
• Storage temperature: -40 to +85 °C
• Supply voltage: 9–36 V DC
• Maximum power consumption: 35–38 mA @ 12 V DC
• Noise density: < 25 µg/√Hz (@ ±2 g); < 60 µg/√Hz (@ ±16 g)
• Maximum calibration uncertainty: < 1 mg
• Electrical protection: EMC and RFI shielding
• Reliability: MIL-HDBK-217 Level 2
• Self-test: ±1 g @ 10 Hz test
• Protection class: IP67
• Dimensions: L55 × W37 × H29 mm
• Weight: ≤ 120 g (excluding cable)

Technical Specifications

• Output signal: DC-coupled 4–20 mA
• Measurement ranges: ±2 g, ±4 g, ±8 g, ±16 g (configurable)
• Axes: Triaxial (X, Y, Z)
• Resolution: < 1 mg
• Frequency response / Bandwidth: 0–200 Hz (200 Hz @ 3 dB)
• Linearity: 1%
• Supply voltage: 9–36 V DC
• Power consumption: 35–38 mA @ 12 V DC (max)
• Noise density: < 25 µg/√Hz (@ ±2 g), < 60 µg/√Hz (@ ±16 g)
• Self-test: Built-in (±1 g @ 10 Hz)
• Protection class: IP67
• Electrical protection: EMC and RFI shielding
• Dimensions: L55 × W37 × H29 mm
• Weight: ≤ 120 g (excluding cable)