Ultra-Low Noise Vibration Sensing with Epson M-A370 Accelerometer

Introduction – Ultra-Low Noise Vibration and Structural Monitoring with Epson M-A370

Seismic activity, structural fatigue, and subtle ground movement require precise measurement—well beyond the capability of conventional sensors. Engineers working in seismic observation, infrastructure health monitoring, and resource exploration need sensors that combine ultra-low noise with long-term stability.

The new Epson M-A370 accelerometer addresses this challenge. Now in mass production, this compact, digital-output 3-axis accelerometer delivers exceptional sensitivity and bias stability—enabling high-reliability embedded monitoring systems.

Features of Epson M-A370 Accelerometer Addressing the Challenge

The M-A370 builds on Epson’s proprietary microfabrication and digital signal processing expertise to achieve performance typically reserved for large-scale seismic equipment:

• Ultra-low noise: 0.02 µG/√Hz (1 Hz – 10 Hz)

• High bias stability:

  • ±0.5 mG bias temperature error

  • ±0.1 mG bias repeatability over 1 year

• High dynamic range: ±10 G

• DC to 210 Hz frequency range

• Amplitude response: ±0.4 dB

• Phase response: ±0.1°

• Digital SPI/UART output—no analogue signal degradation

• GNSS synchronisation via 1PPS input for precise multi-sensor alignment

• Built-in self-diagnostic function

• MTTF: 87,600 hours (~10 years)

Detailed Specifications for Epson M-A370AD10

Feature	Specification	Benefit
Dynamic range	±10 G	Suitable for microtremor to high shock
Noise density	0.02 µG/√Hz (1–10 Hz)	Ultra-low noise floor for seismic use
Bias temperature error	±0.5 mG	High long-term measurement stability
Bias repeatability (1 year)	±0.1 mG	Ideal for permanent monitoring systems
Measurement bandwidth	DC to 210 Hz	Suitable for tilt + vibration monitoring
Output format	SPI / UART digital	Simplifies embedded integration
GNSS synchronisation	Supported via 1PPS	Enables accurate multi-node correlation
Power supply	3.15 V – 3.45 V	Low voltage operation
Typical current consumption	36.3 mA @ 3.3 V	Optimised for low-power systems
Operating temperature	-30 °C to +85 °C	Industrial and outdoor capable
Size	48 x 24 x 16 mm (aluminium case)	Compact, rugged form factor
MTTF	87,600 h (~10 years)	Supports long-term installation

Industry Applications and Use Cases

Seismic and Geophysical Monitoring

• Earthquake detection

• Continuous microtremor monitoring

• Resource and underground structure exploration

Structural Health Monitoring (SHM)

• Tilt and stability monitoring of buildings, bridges, and tunnels

• Long-term infrastructure condition tracking

• Early anomaly detection in critical assets

Industrial Vibration Monitoring

• Machine health monitoring

• Vibration control and stabilisation

• Predictive maintenance

Next steps

With its combination of ultra-low noise, digital output, and GNSS synchronisation, the Epson M-A370 accelerometer brings advanced vibration and tilt sensing to a wide range of embedded monitoring systems.

It enables:

• Seismic-quality data in compact embedded designs

• High-stability tilt monitoring for structural health

• Low-power, networked sensing for smart infrastructure

Contact Ineltek now to evaluate the M-A370AD10 for your next vibration or structural health project—and build safer, more resilient systems with Epson sensing technology. Get your next project off on the right footing by requesting a technology introduction with the Epson team here.

Download the M-A370 Brief Sheet by clicking the PDF icon