Ant-3C-2Hz - GEOANT 3-channel wireless geophone

General specifications

• Weight: 2200 g excluding spike
• Dimensions: 90 x 100 x 189 mm
• Operating temperature: -40 °C to +70 °C
• Protection rating: IP68
• Charging time: 6.5 hours
• Typical operating life: 7 days in real-time transmission, 40 days at 24 h/day, 20 days with 4G transmission every 10 minutes and 80 days at 12 h/day

Acquisition and electronics

• Channels: 3 channels with Delta-Sigma ADC
• A/D converter: 32-bit
• Sampling rates: 0.25 ms, 0.5 ms, 1 ms, 2 ms, 4 ms, 8 ms, 10 ms and 20 ms
• Preamplifier gain: 0 to 24 dB in 6 dB steps
• Low-cut filter: 1 Hz, DC removed or disabled
• Anti-alias filter: 206.5 Hz at 2 ms, selectable linear phase or minimum phase
• Maximum input at 0 dB: 2.5 V peak
• Equivalent input noise at 12 dB: 0.5 μV at 0.25 ms; 0.2 μV at 2 ms; 0.14 μV at 4 ms
• Instantaneous dynamic range at 12 dB: 118.9 dB at 0.25 ms; 126.8 dB at 2 ms; 130 dB at 4 ms
• Total dynamic range: 145 dB
• Timing accuracy: <1 ppm standard and ±10 µs GPS disciplined
• Storage: expandable from 32 GB to 128 GB
• Built-in GNSS: GPS/Beidou/GLONASS/GNSS positioning and timing
• Gain accuracy: <1%

2 Hz geophone sensor

• Natural frequency: 2 ±15%
• DC resistance: 6400 ±10%
• Open-circuit sensitivity: 260 ±15%
• Damping: 0.7 ±15%
• Distortion: ≤3%
• Spurious frequency: ≥90 Hz
• Effective frequency range: 0.1 to 300 Hz