B03Y70

The B03Y70 is a three-axis watertight IEPE accelerometer built on a piezoelectric ceramic shear structure with a wide-band frequency response and high-quality ceramics with the long-term stability to keep measurements accurate for years. With 20 mV/g sensitivity and a ±250 g range on each axis it is the mid-range model in the family, with ±250 g on all three axes balancing range and resolution for everyday underwater vibration work. Typical uses include underwater vibration testing, powertrain NVH in wet conditions, component and system testing and marine and subsea structural measurement.

A one-piece vulcanized polyurethane cable with multi-layer protection is rated to water pressure above 2 MPa and exits from the side on a single 4-pin lead carrying all three channels, so there is no connector to flood. The built-in low-impedance circuit gives low noise and a well-behaved sensitivity temperature response (−0.07 %/°C). The laser-welded low-density titanium-alloy 15 × 15 × 10 mm housing weighs 18 g, uses memory-alloy fasteners for a stable, reliable structure, has a calibration hole on each axis, and bolts down through a ⌀4.1 mm through-hole with the insulated mounting kit supplied.

Sealed for immersion and corrosion

Laser-welded titanium housing sealed to IP68 with a one-piece vulcanized PU cable rated above 2 MPa and inherently resistant to moisture and corrosion. No connector, no O-ring, nothing to flood. Rated to 1,200 g rms vibration and 3,000 g pk shock, −50 to +120 °C.

Three axes, one cable, one bolt

Simultaneous X, Y and Z measurement from a single 15 × 15 × 10 mm block with ≤ 5% transverse sensitivity. One side-exit 4-pin cable carries all three channels, per-axis calibration holes make verification straightforward, and the through-hole mounts at any orientation with the insulated kit supplied.

Built-in IEPE electronics

Shear-mode ceramics with memory-alloy fasteners give a ±5% response from 1 Hz to 6 kHz with resonance ≥ 30 kHz, 1% non-linearity and a ≤ 1 s discharge time constant. Built-in IEPE circuit with 2–20 mA excitation and 8–12 V bias, spectral noise of 20 µg/√Hz at 100 Hz and 0.0005 g rms broadband resolution.

Key specifications