MEMS vibration sensor AKC378

for machine condition monitoringfor railway applicationsfor automotive applications

Product summary

• Triaxial MEMS capacitive vibration sensor
• 4-20 mA DC current output
• Configurable measurement range: ±2 g to ±16 g
• Built-in self-test function
• Operating temperature: -40 °C to +85 °C

Product description
The AKC378 is a triaxial vibration sensor using single-crystal silicon MEMS capacitive sensing with on-board signal compensation to ensure linearity and long-term stability. The sensor provides a DC-coupled 4-20 mA analog current output suitable for industrial monitoring systems. Frequency response supports DC and low-frequency vibration measurement from 0 Hz up to 200 Hz. Integrated EMC/RFI shielding improves immunity in electrically noisy environments. Its low-power design and compact dimensions make it suitable for continuous monitoring and integration into control systems. A built-in self-test allows rapid verification of sensor and signal-chain integrity.

Scope of application

• Bridge structural and impact monitoring
• Wind power turbine monitoring
• Traffic system monitoring, subgrade analysis and high-speed rail fault detection
• Large machinery and engines condition monitoring
• Low-frequency vibration automatic monitoring
• Roller and rotating equipment monitoring
• Automotive testing and monitoring
• Medical equipment vibration measurement

Technical specifications

• Model: AKC378
• Measurement range: ±2 g to ±16 g (configurable)
• Axes: X, Y, Z (triaxial)
• Resolution: <1 mg
• Zero output current: 12 mA
• Full-scale output: 4-20 mA
• Linearity: <1 %
• Power-on/power-off repeatability: <2 mg
• Frequency response: 0 – 200 Hz (integrated low-pass filter)
• Bandwidth: 200 Hz @ 3 dB
• Impact resistance: >100 g @ 11 ms (half sine)
• Shock recovery time: <1 ms
• Operating temperature: -40 °C to +85 °C
• Storage temperature: -40 °C to +85 °C
• Supply voltage: 9 – 36 V DC
• Maximum current consumption: 65 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 (self-test when line grounded)
• Ingress protection: IP67
• Dimensions: L55 × W37 × H29 mm
• Weight: ≤100 g (excluding cables)