B02A71

The B02A71 is a uniaxial IEPE waterproof accelerometer with a built-in miniature impedance converter that turns the piezoelectric charge signal into a low-impedance voltage output. With 10 mV/g sensitivity and a ±500 g range it is the highest-range model in the family, with ±500 g and the lowest noise in its class for high-level underwater vibration and moderate shock. Typical uses include underwater vibration testing, hull, propeller and propulsion vibration, marine and offshore structures under wave and slamming loads and washdown or flooded installations.

A one-piece vulcanized polyurethane cable with multi-layer protection is rated to water pressure above 5 MPa and is inherently resistant to moisture and corrosion, so there is no connector to flood. The built-in IEPE circuit runs from any 2–20 mA constant-current source with an 8–12 V bias. The laser-welded titanium-alloy HEX 18.1 × 61.73 mm housing weighs 15 g, is sealed to IP68 and screws down on an M5 × 3.7 (10-32 opt.) stud torqued to 3.0 N·m. TEDS is available to order.

Sealed for immersion and corrosion

Laser-welded titanium-alloy housing sealed to IP68 with a one-piece vulcanized PU cable rated above 5 MPa and inherently resistant to moisture and corrosion. No connector, no O-ring, nothing to flood. Rated to 3,000 g rms vibration and 8,000 g pk shock, −50 to +120 °C.

Built-in IEPE electronics

Shear-mode piezoceramic with a built-in impedance converter: ±5% response from 1 Hz to 10 kHz (±10% over 0.5 – 11k Hz), resonance ≥ 50 kHz, spectral noise of 24 µg/√Hz at 100 Hz and 0.001 g rms broadband resolution, straight into any IEPE input on the surface.

Easy to fit under water

HEX 18.1 × 61.73 mm hex body on an M5 × 3.7 (10-32 opt.) stud, torqued to 3.0 N·m, with the cable exiting from the top so it runs straight up from the mounting face. Recommended mounting base H02B03.

Key specifications