MEMS vibration sensor AKF390

capacitivefor machine monitoringfor machine condition monitoring

Product description
The AKF390 is a calibrated triaxial MEMS capacitive accelerometer with analog voltage output (0–5 V) engineered for industrial vibration and shock measurement. It integrates a single‑crystal silicon capacitive sensor, a low‑power ASIC for signal conditioning, a microcontroller for compensation storage and a temperature sensor. The compact aerospace‑grade aluminium housing is IP67 rated and uses an industrial M12 connector for field installation.

Key functional points

• Measuring axes: X, Y, Z (triaxial)
• Output voltage: 0–5 V (0 g centered at 2.5 V)
• Selectable ranges: ±2, ±4, ±8, ±10, ±20, ±40 g
• Power supply: 9–36 VDC; current consumption <60 mA @ 12 VDC
• Shock resistance: 100 g @ 11 ms (3‑axis test); summary values up to 2000 g noted
• Operating/storage temperature: -40 °C to +85 °C
• Protection: IP67; connector: industrial M12

Scope of application

• Road rollers and compactors monitoring
• Bridge structural health monitoring
• Transport infrastructure monitoring, subgrade analysis and high‑speed railway fault detection
• Vibration monitoring of large machines and engines
• Low‑frequency vibration systems and automated monitoring setups
• Shock recording and fatigue prediction

Parameters

• Model: AKF390
• Range: ±2 / ±4 / ±8 / ±10 / ±20 / ±40 g
• Offset calibration: <1 mg (all ranges)
• Sensitivity (±10%): 1250, 625, 312.5, 250, 125, 62.5 mV/g
• Temperature coefficient (offset): 0.01 / 0.01 / 0.01 / 0.05 / 0.05 / 0.05 %/°C
• Resolution / threshold (@1 Hz): <1 mg (all ranges)
• Nonlinearity (max): <0.5 / <0.5 / <0.8 / <1 / <1 / <1 % FS
• Frequency response: 500 Hz; Bandwidth (3 dB): 1000 Hz
• Noise density: 21 / 21 / 21 / 86.6 / 86.6 / 86.6 μg/√Hz
• Cross‑axis sensitivity and resonance frequencies as specified

Dimensions

• Sensor body: 34.3 × 34.3 × 38.5 mm
• Installation footprint: 25.5 × 25.5 × 1.5 mm
• Mounting: 4 × M3 screws; magnetic base and L‑adapter included

Technical specifications

• Output type: Analog voltage 0–5 V (0 g = 2.5 V)
• Input (VDD–VSS): 9–36 VDC; current <60 mA @ 12 VDC
• Shock recovery: <1 ms (1000 g test case noted)
• Vibration tolerance: 20 g RMS, 20–2000 Hz (per axis, 30 min)
• Shock resistance: 100 g @ 11 ms (half‑sine, 3 axes)
• Connector: Industrial M12; Protection rating: IP67
• Reliability: MIL‑HDBK‑217, Grade 2
• Weight: sensor 82 g; magnetic base 48 g; L‑adapter 20 g