B03A71

The B03A71 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 20 mV/g sensitivity and a ±250 g range it is the mid-range model in the family, with ±250 g balancing range and resolution for general underwater vibration work. Typical uses include underwater vibration testing, marine and subsea NVH, hull and propulsion vibration and monitoring in humid or flooded environments.

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 2,000 g rms vibration and 5,000 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 12 µg/√Hz at 100 Hz and 0.0005 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