B09Y42

The B09Y42 is a high-sensitivity three-axis IEPE accelerometer built on a piezoelectric ceramic shear sensing element with a wide-bandwidth response and a low-noise circuit optimized for low vibration amplitudes. With 500 mV/g sensitivity, a ±10 g range and a ±5% response from 1 Hz, it is the mid-sensitivity member of the family, with 500 mV/g and a ±10 g range for low-amplitude structural vibration. Typical uses include bridge, building and civil structural measurements, foundation and ground vibration, wind-turbine tower monitoring and modal surveys.

The built-in low-impedance circuit gives a stable low-frequency response and spectral noise of just 0.48 µg/√Hz at 100 Hz. The laser-welded titanium-alloy 38.6 × 38.6 × 20 mm housing weighs 150 g, bolts down through a ⌀5.1 mm center hole at any rotational orientation, and keeps an M2.5 mounting thread on each axis for coupling and calibration. Three M5 connectors bring out the X, Y and Z channels, and insulated mounting hardware ships as standard.

High sensitivity, low noise

500 mV/g output with spectral noise of 1.2 / 0.48 / 0.32 µg/√Hz at 10 / 100 / 1000 Hz and 0.00002 g rms broadband resolution, so the micro-g amplitudes of buildings, bridges and foundations come through clearly above the noise floor.

Three axes, one bolt

Simultaneous X, Y and Z measurement from a single 38.6 × 38.6 × 20 mm block with ≤ 5% transverse sensitivity. The center through-hole mounts at any angle, and per-axis M2.5 threads make coupling checks and calibration straightforward.

Stable low-frequency IEPE electronics

Low-impedance circuit with 2–20 mA constant-current excitation, 8–12 V bias and a ≤ 1 s discharge time constant holds the ±5% response from 1 Hz to 4 kHz, with resonance ≥ 15 kHz. Rated to 80 g rms and 200 g pk.

Key specifications