ALPHA Posthole
ALPHA Posthole Seismometer
Product Overview
ALPHA Posthole Seismometer
Key Features
Instrument Design
- Triaxial topology with three symmetrically orthogonal mounted sensors
- Fine pitched adjustable feet manufactured from phosphor bronze.
- Shielded against external magnetic disturbances by mu-metal inside the casing
- Doubled nested feed back loop.
Instrument Characteristics
- Ultra-Broadband flat frequency response from 2.7 mHz (360 sec) to 270 Hz. Options for low frequency cut-offs at 60 sec and 120 sec available
- Offered in a whole range of sensitivities from 2*750 to 2*10,000 V/m/s (differential output)
- Operational range within ± 5.0 degrees of tilt.
- Cross axis rejection >-75 dB.
- Nine independent analogue output channels: x, y, z = Z, N/S, E/W, u, v, w (Galperin) and mass positions for each sensor
- Mass positions can be used to determine ground tilt
Enclosure
- Rugged housing made from 316 stainless steel material.
- Weight 14.5 kg.
- Dimensions: outer diameter 16.5 cm, height 28.4 cm
- Waterproof as per IP68 standard.
Power and Electronics
- Power consumption < 1 W within the operating range from 9 to 36 V.
- Input power is protected against reversed polarity.
- The whole electronic circuitry is two stage galvanically isolated.
To obtain a detailed data sheet for this seismometer, please contact GaiaCode Headquarters
Disclaimer: The product specifications and the stated data are subject to change without prior notice.
