CMG-SP1 Seismometers

SP1-range

High performance, low noise, lightweight, short period, broadband seismometers

The Guralp Systems  Short Period instruments are a low-noise, small, extremely light, highly robust, multi-purpose, one Hertz force-feedback sensor designed to offer a modern replacement for the traditional geophone.

Due to the feedback system it does not exhibit any of the drawbacks associated with traditional geophone-type sensors. It is highly linear with a stable transfer function, resulting in no measurable change in frequency due to tilt or temperature change over its entire operating range.

Key features / Benefits

• Force feedback broadband instrument
• Lifting handle and all connectors on the top of the instrument.
• Waterproof and durable with O-ring seals throughout
• Common signal & enable lines exposed on sensor connector
• Digital output and communication versions available
• Optional Smart Sensor interface (IEEE 1451.4 TEDS Compliant)

Typical applications

• Micro seismic monitoring
• Local seismic networks
• Geothermal energy
• Gas storage facilities
• CO2 storage monitoring
• Nuclear waste

Example customers

• TBC
• TBC
• TBC

Specifications

SYSTEM

Configuration / Topology: Triaxial orthogonal
Feedback: Force feedback.

PERFORMANCE

Response: 1s – 100Hz standard (Other options available)
Output sensitivity / Clip Level: 2 x 1000 V/ms-1 (Other options available)
Peak / Full scale output:
Cross axis rejection: Orthogonal instrument with high cross-axis rejection (>65dB)
Linearity: TBC
Lowest spurious resonance: TBC
Self-noise: TBC
Dynamic range: High sensitivity and dynamic range (>135dB)

CALIBRATION

Type: Pulse, sine wave and broadband
Calibration controls: Common signal & enable lines exposed on sensor connector

MASS / MASS MONITORING

Locking: No mass clamping required – plug in and go
Mass position output band: TBC
Mass recentring range: TBC

POWER

Power supply: TBC
Optional low power sensor: TBC
Protection: TBC
Current at 12VDC: TBC

ENVIRONMENTAL

Operating temperature: -20 to +65°C
Operating Temperature sensitivity: TBC
Storage Temperature: TBC
Instrument Levelling: TBC
Case integrity: IP67 for outdoor use and immersion resistance
Shock: TBC
Humidity: TBC
Auto recovery time: TBC
Alignment: TBC

CONTROL

Mass control / locking: TBC
Offset zeroing: TBC
PHYSICAL
Dimensions: ø76mm x 315mm for single component, slim-line borehole verison. ø140mm x 265mm for triaxial surface version.
Enclosure: Hard anodised aluminium. Optional: Stainless Steel
Weight: TBC
Handling: TBC
Communication / Connectors: Mil-spec connectors

ACCESSORIES

TBC