Güralp 40 series Seismometers

CMG-40T

High performance, low noise, broadband Seismometers

Model range

40T – Standard Seismometer – Datasheet
40TD – Digital seismometer – Datasheet
40TDE – Digital seismometer with acquisition module – Datasheet
40TB – Borehole seismometer – Datasheet

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
• Quick and easy, one-person installation
• Digital output and communication versions available

Typical applications

• Rapid response and aftershock monitoring
• Volcano monitoring
• Micro-seismic monitoring
• Local seismic networks
• Portable deployments
• Monitoring slope behaviour

Example customers

• TBC

Specifications

SYSTEM

Configuration / Topology: Triaxial orthogonal
Feedback: Force feedback

PERFORMANCE

Response: 30s to 50Hz standard (Other options available)
Output sensitivity / Clip Level: 2 x 400 V/ms^-1 (Other options available)
Peak / Full scale output: ±10 V (20 V peak-to-peak)
Cross axis rejection: > 65dB
Linearity: > 90dB
Lowest spurious resonance: 450Hz
Self-noise: TBC
Dynamic range: TBC

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: ±3° from horizontal

POWER

Power consumption: 0.46W
Power supply: 10 – 36V DC
Optional low power sensor: 5V DC supply (output ±4.5 V)
Protection: TBC
Current at 12VDC: TBC

ENVIRONMENTAL

Operating temperature: -20 to +75°C
Operating Temperature sensitivity: < 0.6 V per 10°C
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: Remote offset zeroing with DC motors
Offset zeroing: Adjustable through case
PHYSICAL
Dimensions: Ø154mm x 207mm
Enclosure: Stainless steel case, Gold plated contacts, O-ring seals throughout
Weight: 2.49 kg
Handling: TBC
Communication / Connectors: Mil-spec connectors

ACCESSORIES

Handheld Control Unit