A06D70

The A06D70 is a waterproof uniaxial capacitive MEMS accelerometer with true DC response, so it measures static acceleration, tilt and slow motion as well as vibration, underwater or in the open. A variable-capacitance MEMS element with internal AC excitation and demodulation outputs a single-ended voltage signal proportional to acceleration, and with 80 mV/g sensitivity and a ±50 g range it is the higher-sensitivity model of the pair, with ±50 g and lower noise for structural and low-frequency work in wet, submerged or corrosive conditions. Typical uses include underwater and marine structural testing, civil structural and foundation measurement, road-load acquisition on body and chassis and low-frequency and tilt measurement in wet environments.

An integrated vulcanized four-core cable with a special cable structure withstands longitudinal and transverse water pressure above 3 MPa and is inherently resistant to moisture and corrosive media, so there is no connector to flood. The response is flat within ±5% from DC to 1.5 kHz with a 5.8 kHz resonance, ≤ 2% transverse sensitivity and 0.1% typical non-linearity (0.3% max), a ±4 V full-scale output and noise of 169 µg/√Hz over 0 – 100 Hz, from any 6 – 30 VDC supply. The laser-welded titanium-alloy 18 × 18 × 14.4 mm housing weighs 10 g, is sealed to IP68 with the signal ground isolated from the housing, and bolts down through two M3 through-holes.

Sealed for immersion and corrosion

Laser-welded titanium housing sealed to IP68 with an integrated vulcanized cable rated above 3 MPa in both directions and inherently resistant to moisture and corrosive media. Rated to 5,000 g rms vibration and 5,000 g pk shock, −40 to +120 °C.

True DC response

Capacitive MEMS sensing measures from 0 Hz, so static tilt, sustained acceleration and slow motion are captured alongside vibration to 1.5 kHz. Resonance 5.8 kHz, transverse sensitivity ≤ 2%, non-linearity 0.1% typical.

Low-noise MEMS chip

An industry-leading capacitive DC-response MEMS chip gives 169 µg/√Hz noise over 0 – 100 Hz and 2.45 mg rms broadband resolution, with a single-ended ±4 V full-scale output that runs straight into a voltage-input DAQ from a 6 – 30 VDC supply at low power.

Key specifications