GN309 Intelligent Micro Seismograph
GN309 is an intelligent single-component 2Hz, high-sensitivity and long-distance seismograph specially developed for the detection of geological disasters in urban underground space. The product can transmit 4G/5G long-distance in real time, the built-in battery can work continuously for 15 days, and the external battery pack can work continuously in the field for 150 days. The product's reliability, portability, ease of use, detection accuracy, battery life and other performance indicators have been greatly improved.The device can explore depths from a few meters to more than 6,000 meters. In addition,the super anti-interference ability, efficient construction efficiency and high resolution in the market receive much praise from customers and experts.
Product Picture: Integrated Charging Box:
Practical Application for GN309:
1.Engineering exploration:
Urban underground space, roadbed boulders, urban drainage pipelines, detection of engineering crack.
2.Resources exploration:
Lithology mutation (aquifer), coal and oil and gas exploration, etc.
3.Structural exploration:
Karst, fault fracture zone, collapse column, goaf, real-time monitoring of overburden thickness.
4.Real time monitoring:
Real time monitoring and warning of oil and gas fracturing, landslides, and road collapses.
5.Natural activities:
Monitoring of crustal and upper mantle plate activity.
Detector Parameter:
| Natural Frequency | 2Hz |
| Sensitivity | 260 V/m/s |
| Frequency Range | 0.15～1600Hz |
Physical Indicators：
| Size | Φ125mm,H165.5mm（without cone） |
| Weight | ＜1.6 kg（with battery without cone） |
| Waterproofness | IP67 |
| Temperature | -40℃~85℃ |
Electronics Indicators:
| Channels | 3-Channels (built-in single component vertical sensor) |
| Endurance | Built-in battery, typical working conditions, with a range of 15 days (4G transmission mode). |
| AD Converter | 32 Bit ADC |
| Preamplifier Gain | 0dB, 6dB, 12dB, 18dB, 24dB, 30dB, 36dB |
| Sampling Interval | 4ms, 2ms, 1ms, 0.5ms, 0.25ms |
| Maximum Input | 5V |
| Dynamic Range | 123dB(1ms Sampling Interval, 0dB Preamplifier Gain) |
| Synchronization Accurancy | ≤1μs(After GPS signal lock) |
| Noise Level | 0.11μV RMS(1ms Sampling Interval, 0dB Preamplifier Gain) |
| Common-mode Rejection | ＞110dB(1ms Sampling Interval, 0dB Preamplifier Gain) |
| Harmonic Distortion | ＜-122dB(1ms Sampling Interval, 0dB Preamplifier Gain) |
Charging and Data Recovery Cabinet
Number of Channels | 16 Channels(Charging and data recovery at same time) |
Weight | 4.7 kg |
| Size | 360mm*280mm*180mm |
Data Transmission Interface | RJ45 Ethernet |
Charging Current | Single Channel Max 4A, 16 Channels Max 58A |
Input Power | 220V/110V AC, Max Current 5A, Max Power 1100W |