Welcome To Seismic Source Company

Seismic Source Company is a manufacturer of seismic instruments and data acquisition systems. Its products are used in a broad range of applications: Seismology, Structural Monitoring, Seismic Site Evaluation, Civil Engineering, Gas and Oil Exploration, Industrial Vibration Monitoring.


High Resolution Seismic Recording System

with High Speed, Compact Size & Low Power

 DAQlink4 is the fourth generation of portable seismograph systems. It can be configured as a stand-alone monitoring system, a refraction system or a distributed seismic reflection system.

 Vscope software controls the seismograph, providing acquisition control, data QC and file storage. This seismograph utilizes industry standard Ethernet for command, control, and fast data file transfer.


System Features:


Cutting-Edge Performance

1 to 24 channels per seismograph node

High-Speed 24bit ADC – up to 64,000 sps

Wide Bandwidth – DC to 20 KHz

Low Distortion – 0.00008% THD @ 500 sps

Wide Dynamic Range – >124 dB @ 500 sps

Low Noise – less 0.2 µV RMS @ 500 sps


Multiple Time Synchronization Modes

GPS Clock Discipline for Autonomous Recording

VHF/UHF Radio for Underground Use

Or synchronize multiple DAQlink via cable


Multiple Trigger Modes

Trigger on hammer switch for shot acquisition

Trigger using GPS time for noise monitoring

Trigger using LTA and STA for event monitoring

Two trigger circuits available, one for standard and a second for low-voltage inputs


Multiple Data Storage Methods

16 Gbytes internal memory card standard
External mounted, USB-compatible Memory Plug for data backup and transfer
Ethernet connection for fast data transfers and remote data storage

Built-in Ethernet Network

Use network to configure seismograph and monitor acquisition
Compatible with cables, Wi-Fi and Cellular Data
Internal FTP server for external data access

Built-in Acceptance Testing

Instrument Tests:
  Distortion, Cross-feed, CMRR, Impulse & Noise
Sensor Tests:
  Resistance, Frequency, Damping, Sensitivity



daq4 24

 24 Channel Seismograph



Operation Modes:


Operate as Stand-Alone Seismograph

Use a sledgehammer and hammer switch

Small, lightweight unit for small, fast crews


Operate as an Acquisition System

Use a vibrator and Force 3 controller

Network a computer to Monitor Acquisition,
Quality Control Data, and Store Shot Records


Passive Monitoring

True Continuous Recording

Use Cellular Modem for Remote Data Collection

Works with surface or downhole sensors


Automated Event Detection

Continuously record and store data
Use LTA (Long Term Average) or STA (Short Term Average) to detect events
Includes automatic email notifications as events are located

distributed daqlink4

distributed daqlink4

Multiple Node System


Downhole Data Acquisition


Distributed DAQlink4 System


 The Distributed DAQlink4 System is the combination of a standard DAQlink4 Seismograph and internal, high-speed, network extenders. Using inexpensive twisted pair telephone cable, these network extenders will send triggering times and receive seismic data from other DAQlinks. These cable links can send reach 10,000 ft, or three kilometers in length.
  The entire system is connected to a computer which controls the seismograph network and stores the acquired seismic data. This computer can be simultaneously providing Quality Control as the project is acquired. The final data files can be stored in SEG‑2, SEG‑D, SEG-Y, ASCII or MiniSEED format.


daq4 24d

Distributed DAQlink 4



Large Projects


Small Crews


DAQlink 4 Seismograph


 DAQlink4 is the fourth generation unit from the Seismic Source Acquisition Series.
  The system can be configured as a stand-alone monitoring system, a refraction system or a distributed seismic reflection system.
  The DAQlink4 is a true continuous recorder, and is perfect for acquiring passive data.


Expandability and Flexibility


 All DAQlink4 seismographs are compatible with the entire line of Seismic Source Co source control electronics. This includes the Force3 Vibroseis controller, the Boom Box 3 dynamite synchronizer and the RTM3 remote trigger module. DAQlink nodes are also compatible with the Universal Encoder 2. Use the UE2 for precise source operation.


Includes VibraScope Software:

distributed daqlink4

Configures DAQlink4 for Acquisition
Monitors Seismograph Operation
Offloads and Evaluates Data
Data Display
Analysis – Amplitude & Phase Spectra
RMS Noise and Signal Graphs
For larger systems, DAQlink4 seismographs are compatible with the full line of iSeis Sigma Field Software, including SourceLink & Sigma Observer.

DAQlink4 Specifications:



24 bit sigma delta converter


Anti-Alias Filters


85% of Nyquist frequency


Low Cut Filter


User Selectable from 0.001 Hz to 120 Hz


Filter Type


Linear Phase


Sample Rates


125 to 64,000 sps


PreAmp Gain


x1 (0 dB) and x16 (24 dB)


Max Input Voltage


±3.7 Volts @ x1 Gain




DC to 20 kHz


Power Usage


Typically 0.13 watts per channel


Input Impedance


100k Ohms


Clock Sync


GPS or VHF Radio


Power Supply


10-28 VDC


Number of Channels






-40°C to +85°C




0 to 100%




11.0" x 9.7" x 1.6" (280 x 246 x 40 mm)




4.5 lbs (2.0 kg)


Data Storage (Internal 16GB CF)


120 hours (24 channels @ 500 sps)


Data Storage (on Computer)




Data Storage (External USB)




Data Format






Network, Status, Battery

Performance @ 500sps:

Trigger Accuracy




Dynamic Range


Better than 124 dB




0.00008 %




Better than -125 dB


Common Mode Rejection Ratio


Better than 100 dB


Noise Floor


< 0.2 µV RMS @500sps


Computer Network


10-pin Weatherproof




6-pin Weatherproof




3-pin Weatherproof




2-pin Weatherproof


Auxiliary Data


14-pin Weatherproof


USB Memory


19-pin Weatherproof


Seismic Data


55-pin Weatherproof


  Distributed DAQLink4 Brochure Download DAQLink 4 Brochure

Seismic Source Co

2391 E. Coleman Rd.
Ponca City, OK 74604
Phone: (580) 762-8233
Fax: (580) 762-1785
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