Product Description
The RC-3C Seismograph Sensor, developed by RanCheng Group, is a three-component seismic instrument designed for advanced field exploration. It integrates ultra-low-power circuits, GNSS synchronization, and real-time data communication technologies. Its high integration and durable contactless design allow reliable operation under harsh environmental conditions.
With advanced analog-to-digital conversion, the RC-3C Seismograph Sensor achieves a dynamic range exceeding similar products, enabling the detection of very small ground vibrations. The instrument supports both 2Hz and 5Hz sensors, providing flexibility for diverse seismic surveys.
Technical Parameters
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Physical |
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Parameter |
Index |
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Weight |
1750g(5Hz)/2450g(2Hz)/Without spike |
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Size |
90mmx100mmx128mm(5Hz)/90mmx100mmx189mm(2Hz) |
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Working Temperature |
-40℃ to+70℃ |
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Waterproof |
IP68 |
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Endurance Time@25℃ |
40 days(24 hours continuously working internal storage) |
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Charging Time |
6.5 hours |
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Instrument |
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Parameter |
Index |
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Number of Channels |
3 channel △- ∑ADC |
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ADC |
32 bit |
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Sampling Rate |
0.25ms,0.5ms,1ms,2ms,4ms,8ms,10ms,20ms |
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Preamplifier Gain |
0-24dB(6dB steps) |
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Low Cut Filter |
1Hz,DC removed or turn off |
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Anti Aliasing Filter |
206.5Hz@2ms(82.6%Nyquist frequency)optional Linear |
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OdB @Max Input |
2.5Vpeak |
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Equivalent Input Noise @12dB |
0.5uV@0.25ms/0.2uV@2ms/0.14uV@4ms |
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Instantaneous Dynamic Range @12dB |
118.9dB@0.25ms/126.8dB@2ms/130dB @4ms |
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Total Dynamic Range |
145dB |
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Timing Standard |
<1ppm |
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Time Accuracy |
±10μs |
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Internal Storage |
Extended from 32GB to 128GB |
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Built in GPS |
GPS,BDS,GLONASS,GNSS(Concurrent reception)are used for timing and positioning |
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Sensor |
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Parameter |
Index |
Index |
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Optional Detector |
5Hz |
2Hz |
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Natural Frequency(Hz) |
5±7.5% |
2±15% |
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DC Resistance(Ω) |
1850±5% |
6400±10% |
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Sensitivity(V/m/s) |
80±5% |
260±15% |
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Damping |
0.7±7.5% |
0.7±15% |
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Distortion |
≤0.2% |
≤3% |
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Aliasing(Hz) |
≥120 |
≥90 |
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Valid Frequency Range(Hz) |
0.2~1000 |
0.1~300 |
Key Features
Integrated 2Hz / 5Hz sensors
High sensitivity: detects vibrations as small as 0.16μV
Low power consumption, long battery life
Lightweight and compact
Wireless charging and data transfer
Full GNSS support for precise positioning
Long-range Bluetooth (up to 70m)
Built-in signal generator
High reliability (waterproof IP68, drop-resistant)
Smart start and shutdown modes
Contactless design for durability
Continuous local storage for 40 days (24h operation)
Supports vertical and horizontal deployment
High-precision internal clock
Compatible with replaceable tripod or base
Software System & Functions
RC-3C Seismograph Sensor comes with a complete software suite for data management, visualization, and field deployment.
Ant Manager is a software tool for data management and equipment inspection. It allows users to access daily and annual inspection records, organize and segment collected data, and perform processing tasks. The software supports distributed data management and optimizes processing workflows and threads to enhance efficiency.
Ant Harvester is designed for downloading data from nodes and managing charging operations. It can automatically match nodes to projects for data retrieval and provides real-time monitoring of battery status, satellite signals, temperature, and system clock, making field maintenance easier.
Ant Map offers mapping capabilities for nodes, receivers, and seismic source points. By leveraging high-precision GPS and coordinate fitting algorithms, it achieves node location accuracy within 1.5 meters, enabling users to clearly visualize node layouts and seismic source positions on detailed maps.
Ant View is used for visualizing seismic data, including shot gathers, trace data, continuous gathers, and raw seismic records. It allows users to efficiently analyze data and interpret subsurface structures.
Ant Deploy enables wireless task assignment, node deployment, and retrieval management. It simplifies field operations by allowing remote control of node deployment and collection, improving overall efficiency.
Mobile App provides convenient tools for field deployment and node quality control. Users can automatically match nodes to line numbers and station numbers, monitor battery levels, tilt angles, GPS signals, and acquisition parameters, and create map layouts for rapid deployment and management.
Case Studies
Case 1: Refracted Wave Survey for Cavity Detection
Background: In road and civil engineering projects, underground cavities can pose risks to construction safety and long-term stability. Traditional methods, like exploratory drilling, are time-consuming and costly.
Method: The RC-3C Seismograph Sensor was deployed in 2D and 3D refracted wave surveys using electric spark and heavy hammer sources. Nodes were arranged across the survey area to capture seismic wave travel times and amplitudes.
Advantage: The survey accurately identified the presence, size, and location of underground cavities without the need for drilling. This provided engineers with actionable data for road design and construction planning, reducing risk and cost.
Case 2: Mining Void Detection and Assessment
Background: Overlying strata above abandoned mining areas often develop fractures and loose zones, which can compromise surface stability. Identifying these affected areas is critical for safety and remediation.
Method: The RC-3C Seismograph Sensor collected seismic wave data across the mining area. Differences in wave propagation velocities were analyzed to map high-density bedrock versus low-velocity loose zones. Shear-wave velocity maps and cross-sectional profiles were generated to highlight potential voids.
Advantage: Low-velocity anomalies corresponded to areas with fractures and loose materials, enabling engineers to estimate the size and influence of mining voids. The method provided a detailed, non-invasive assessment of ground stability for planning mitigation and reinforcement measures.
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