B12A53

The B12A53 is a low-noise, high-sensitivity, isolated uniaxial IEPE accelerometer built on a piezoelectric ceramic shear sensing element with a dedicated low-noise ASIC. With 10,000 mV/g (10 V/g) sensitivity and a ±0.5 g range it is the 10 V/g, ±0.5 g member of the compact A53 pair, with the lowest 100 Hz noise of the pair and bandwidth to 1 kHz. Typical uses include bridge, building and civil structural measurements, foundation and ground-borne vibration, micro-vibration surveys of precision facilities and ambient structural monitoring.

High-grade piezoelectric ceramics deliver long-term output stability, and the low-noise ASIC gives spectral noise of 0.13 µg/√Hz at 100 Hz with 0.000003 g rms broadband resolution and a ≥ 10 s discharge time constant that holds the ±5% response from 0.15 Hz to 1 kHz. A double-shielded isolated construction (≥ 10⁸ Ω) rejects common-mode electrical interference on long cable runs, and the laser-welded HEX 30.2 × 56.1 mm stainless-steel housing is sealed to IP68 with a MIL-C-5015 2-pin connector and a 1/4-28 stud mount.

Ultra-low noise floor

10,000 mV/g sensitivity with spectral noise of 0.73 / 0.13 / 0.1 µg/√Hz at 10 / 100 / 1000 Hz and 0.000003 g rms broadband resolution, so sub-micro-g motion is resolved cleanly above the noise.

Isolated, double shielded

Double-shielded construction isolates the signal ground from the housing (≥ 10⁸ Ω) and suppresses common-mode interference, so the tiny signals survive long cable runs through electrically noisy sites. Laser-welded HEX 30.2 × 56.1 mm stainless housing sealed to IP68, rated to 80 g rms and 200 g pk.

Low-frequency IEPE electronics

Dedicated low-noise ASIC with a ≥ 10 s discharge time constant gives a ±5% response from 0.15 Hz to 1 kHz and ±10% over 0.1 – 2k Hz, with resonance ≥ 7 kHz. Standard IEPE two-wire interface with 2–20 mA excitation and 8–12 V bias on an industry-standard MIL-C-5015 connector.

Key specifications