B12A53 – Ultra-Low Frequency & High Sensitivity Vibration Monitoring Sensor by LNS®

For monitoring ultra-low and low-frequency vibrations in large structures such as buildings, bridges, and foundations, LNS® introduces the B12A53 high-sensitivity voltage-type accelerometer. This advanced sensor, designed with a specialized core structure and customized ultra-low noise conditioning circuitry, ensures stability and minimal background noise. Its dual-shielding structure, paired with a military-grade 2-pin output connector, delivers superior interference shielding and a reliable connection.

Product Highlights:

• Ultra-Low Noise Conditioning Circuit: Custom-engineered for clarity and stability in µg-level signal detection.
• High Sensitivity (10 V/g): Accurate measurement of fine vibrations.
• Superior Shielding Performance: Built with a specialized core design for enhanced interference protection.
• Stable Connections: The 5015 2-pin output connector guarantees reliable connectivity and electrical isolation of the housing.
• Customizable Design: Exterior structure modifications available upon request.

Key Specifications:

• Sensitivity: 10 V/g
• Measurement Range: ±0.5 g
• Frequency Response: ±5% at 0.15-1k Hz, ±10% at 0.1-2k Hz
• Amplitude Linearity: ≤1%
• Transverse Sensitivity: ≤5%
• Resonant Frequency: ≥10 kHz
• Resolution: 0.000003 g RMS
• Shock Limit: 200 g pk
• Max Vibration: 80 g RMS
• Temperature Coefficient: 0.1% per °C
• Operating Temperature: -40 to 85 °C

Electrical Characteristics:

• Constant Voltage Supply: 20-30 VDC
• Constant Current Supply: 2-20 mA
• Full-Scale Voltage Output: ±5 V
• Max Over-Range Output: ±6 V
• DC Bias: 8-12 V
• Output Impedance: ≤100 Ω

Construction Details:

• Sensing Element: Piezoelectric ceramic
• Housing Material: Stainless steel with IP68 laser-welded sealing
• Output Connector: Military-grade 5015 2-pin
• Mounting Thread: 1/4-28
• Weight: 227 g
• Recommended Mounting Torque: 3.5 N·m

Applications: Ideal for building vibration monitoring, foundation vibration detection, ground vibration analysis, bridge structure testing, and seismic early warning.

Low-Noise Testing Data: The B12A53 provides exceptionally low noise across a wide frequency range, as indicated in the Power Spectral Density (PSD) chart below:

With its advanced features and reliable design, the B12A53 accelerometer offers precise, stable monitoring of structural vibrations, ideal for high-stakes monitoring in demanding environments.