accelerometers

MEMS sensors can go down to DC and are often cheaper, but they tend to be noisier at low frequencies and more sensitive to temperature swings. Piezoelectric units, like the ones we build, have no moving parts to wear out, better resolution above 0.1 Hz, and survive higher shock loads. For vibration monitoring on bridges or buildings, piezoelectric usually gives more dependable long-term trends.

Yes. Many of our sensors are already used in boreholes and near water. We can terminate with underwater connectors, or build the entire housing to IP68 rating with a continuous cable gland. Just tell us the expected submersion depth and duration when you inquire.

It depends on how small and how strong the vibrations are. For ambient vibration on a tall building, a 1 V/g or 10 V/g sensor with a range of ±0.5 g might be enough. For blasting near a pipeline, you’ll want something that can handle 50 g or more without clipping. If you’re not sure, we can look at your project’s expected acceleration levels—based on similar studies—and suggest a starting point.

We can, though that’s not our main focus. Our specialty is long-term monitoring rather than active-source geophysics. That said, we have built custom arrays with 24+ channels for refraction and downhole work. Contact us with the channel count and spacing you need, and we’ll let you know if it’s within our scope.