ALPHA Light

ALPHA Light Seismometer

Product Overview

In some instances, a lighter version of a robust three component broadband seismometer is desirable. We can offer such a lighter version in our ALPHA family of instruments by packaging a standard ALPHA surface/vault version into a casing of anodized aluminium instead of stainless steel. The material is as robust and corrosion resistant, but the ALPHA Light seismometer is about 30 percent lighter than the standard version. The performance of the two seismometers is essentially the same, except that the standard ALPHA has a slightly lower intrinsic noise at the lowest frequencies compared to the ALPHA Light. As in the case of the standard version, the ALPHA Light is shielded against magnetic disturbances by a Mu-metal sheet inside its casing.
Thumbnail Image

ALPHA Light 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

- Flat frequency response from 0.008333 Hz (120 seconds) to >150 Hz.

- Other response options: 0.033 Hz (30 sec) to >200 Hz and 0.0166 Hz (60 sec) to >200 Hz.

- Offered in a whole range of sensitivities from 2*750 to 2*10,000 V/m/s (differential output).

- Operational range within ± 4.5 degrees of tilt.

- Cross axis rejection >-75 dB.

- Six independent output channels: Velocity outputs = Z, N/S, E/W.

- x, y, z mass positions for each sensor.

- Mass positions can be used to determine ground tilt.

Enclosure

- Rugged housing made from anodized aluminium

- Weight 9.62 kg.

- Dimensions: Outer diameter 16.5 cm, Height 26.0 cm (without feet), 28.5 cm (with feet and connector). Flexible silicon handle; removable if required.

- Waterproof as per IP68 standard. Immersible to depth of 30 m.

 Power and Electronics

- Power consumption 0.775 W within the operating range from 9 to 36 V (actual power consumption at 12 V is 0.75 W).

- Input power is protected against reversed polarity and overvoltage.

- The whole electronic circuitry is two stage galvanically isolated.

- Electronics section and sensor mechanics are hermetically isolated from each other.

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.

CLOSE
Call us
GaiaCode
GaiaCode