Certis - Compact Broadband Seismometer

Overview

The Certis is a compact, ultra-low-power medium-motion seismometer with selectable frequency response and analogue output. Housed in stainless steel with integrated thermometer and humidity sensors, it is rated for direct burial to 10 m depth — ideal for remote solar/battery powered stations and flexible deployment scenarios.

Key Specifications

• Frequency Response: 120 s (0.0083 Hz) to 100 Hz
• Selectable LP corner: 20–120 s (user-adjustable)
• Sensitivity: 750 V/ms⁻¹ differential output
• Dynamic Range: 155 dB
• Self-noise: −175 dB (10 s to 1 Hz)
• Orientation: ±90° (any angle deployment)
• Cross-axis Rejection: >65 dB
• Power Consumption: ~350 mW at 6V (ultra-low-power)
• Spurious Resonance: >450 Hz
• Dimensions: 80 × 80 × 112 mm | Weight: 1.9 kg
• Housing: Stainless steel; direct burial rated to 10 m depth

Applications

• Remote battery/solar-powered installations
• Permanent monitoring stations
• Volcanic and seismic monitoring networks
• Flexible/any-angle deployment scenarios

Standards & Certifications

Compatible with Minimus digitizers and Güralp Discovery software platform. OBS (Ocean Bottom Seismometer) variant available.