Accelerographs and Accelerometers | Kinemetrics

The Obsidian accelerograph is Kinemetrics’ new product matched to Kinemetrics’ exemplary EpiSensor accelerometer performance. It represents a new paradigm in open-architecture seismic data acquisition systems defining the World’s Next Generation of products. The EpiSensor ES-U2 force balance accelerometer is a uniaxial surface package designed primarily for structural engineering applications. However, it can be used in a variety of applications for measuring accelerations up to ±4g and down to the ambient noise level. With full-scale recording ranges of ± 0.25 to ± 4g (user selectable) the ES-U2 provides on-scale recording of earthquake motions even at near-fault locations and in a wide variety of structure types.

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Obsidian | Versatile Strong Motion Recorder
Features & Benefits:

World’s standard Episensor inside.
Four 24-bit channels, one available.
EEWS ready with 1s and 0.1s data packets.
Data redundancy via parallel recording (mirroring).
Compatibility to all major data acquisition platforms.
Capability to include and run your own programs via documented API.
Security via SSH, SSL and OpenVPN.
Lowest Total Cost of ownership (TCO).

Technical Specifications:

Sensor type: Triaxial EpiSensor force balance accelerometer, Orthogonally oriented, Internal .
Bandwidth: DC to 200 Hz.
Frequency response: DC to 80 Hz @ 200 sps.
Accuracy: <1 microseconds of UTC with GPS/GNSS or PTP.
Power input: Mil-style connector for DC power input, external battery connection, Power over Ethernet (Option).

Episensor Es-U2 | The Uniaxial Episensor Accelerometer
Features & Benefits:

Very-low self-noise, resulting in 155 dB dynamic range.
User-selectable full g-scale range: from ±0.25g to ±4g.
User-selectable full output range: from ±2.5V to ±20V, differential.
Wide frequency response: from DC to 200 Hz.
From M=1 to PGA=1g with a single sensor.
Small, versatile, and easy to deploy.
Low non-linearity, hysteresis, cross-axis sensitivity, and thermal drift.
Compatibility to most seismic digitizers today.

Technical Specifications:

Dynamic range: 155 dB+
Bandwidth: DC to 200Hz.
Linearity: < 1000 μg/g2.
Hysteresis: < 0.1% of full scale.
Power consumption: Quiescent current <9 mA from +/- 12V.
Weight: 0.35kg (0.77 pounds)