Amphenol / PCB Piezotronics A353B18 ICP Accelerometer

The Amphenol/PCB Piezotronics A353B18 is a compact ICP accelerometer engineered for high-fidelity vibration measurement across industrial, aerospace, and laboratory environments. Built on a quartz shear-element sensing geometry housed in titanium, this hermetically sealed transducer delivers 10 mV/g sensitivity with ±1% non-linearity and exceptional transverse rejection (≤5%). It operates across a broad frequency spectrum—0.7 to 18,000 Hz at ±10% accuracy, extending to 30 kHz at ±3 dB—making it suitable for machinery condition monitoring, structural dynamics analysis, and broadband vibration characterization.

– Technical Specifications

Dynamic Range & Accuracy
• Sensitivity: 10 mV/g (±10%) / 1.02 mV/(m/s²) (±10%)
• Measurement Range: ±500 g pk (±4905 m/s² pk)
• Broadband Resolution: 0.005 g rms (0.05 m/s² rms)
• Non-Linearity: ≤1%
• Transverse Sensitivity: ≤5%
• Overload Limit: ±10,000 g pk (±98,100 m/s² pk)

Frequency Response
• Rated Bandwidth (±5%): 1 to 10,000 Hz
• Rated Bandwidth (±10%): 0.7 to 18,000 Hz
• Bandwidth (±3 dB): 0.35 to 30,000 Hz
• Resonant Frequency: ≥70 kHz

Environmental Performance
• Operating Temperature Range: -65 to +250 °F (-54 to +121 °C)
• Base Strain Sensitivity: ≤0.003 g/µε (≤0.03 m/s²/µε)

Electrical Interface
• Excitation Voltage: 18 to 30 VDC
• Constant Current Excitation: 2 to 20 mA
• Output Impedance: ≤100 Ω
• Output Bias Voltage: 8 to 12 VDC
• Discharge Time Constant: 0.5 to 2.0 seconds
• Spectral Noise Floor: 2800 µg/√Hz (1 Hz), 700 µg/√Hz (10 Hz), 180 µg/√Hz (100 Hz), 64 µg/√Hz (1 kHz)

– Key Features

• Quartz shear-element design for high stability and low drift
• Titanium hermetic housing withstands extreme thermal and mechanical environments
• Miniature form factor: 9/32 in hex × 0.74 in height (7.1 mm × 18.8 mm); 1.8 gm
• 5-40 male mounting thread with 4–5 in-lb recommended torque
• 10-32 top coaxial receptacle for standard ICP signal conditioning

– Typical Applications

• Machinery health monitoring and predictive maintenance
• Structural dynamics and seismic analysis
• Aerospace and defense vibration testing
• Automotive powertrain and chassis characterization
• Energy sector equipment surveillance
• Process and condition-based monitoring networks

– Compatibility & Integration

The A353B18 operates on standard ICP (IEPE) signal conditioning platforms requiring 18–30 VDC excitation and constant-current drive (2–20 mA). Output impedance ≤100 Ω ensures compatibility with low-noise data acquisition systems and industrial monitoring instrumentation.