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 27 KHz

Low Distortion – 0.00008% THD @ 500 sps

Wide Dynamic Range – >125 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


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 24d

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 DAQlink 4 System is the combination of a standard DAQlink 4 seismograph and internal, high-speed, network extenders. Using inexpensive twisted pair telephone cable, these network extenders will send trig-gering 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 con-trols the seismograph network and stores the acquired seismic data. This computer can be simultaneously providing Quality Control as the project is acquired. Seismic data can be stored in Raw (*.dat), SEG‑2 (*.sg2), SEG‑D (*.sgd), SEG-Y (*.sgy), or ASCII (8.csv), MiniSEED formats.


daq4 24d

Distributed DAQlink 4



Large Projects


Small Crews


Distributed Connection Options

 Cable Solution - 100 meters maximum between network switches

 WiFi solution - typical line of sight or 1 Km with 900 MHz units (distance depends on environment)

 Cellular Data Modem Solution – Connect each DAQlink 4, or the entire DAQlink 4 system, to a cellular data modem and download data from anywhere via the Internet.


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 Features and Specifications:
Technical Features:

A/D Conversion:


24-bit, high-speed, delta-sigma converters


Dynamic Range:


Greater than 125 dB (measured @ 500 sps)




Better than 125 dB (measured @ 500 sps)


Common Mode Rejection:


Better than 100 dB (measured @ 500 sps)


Total Harmonic Distortion


Better than 0.00006% (measured @ 500 sps)


Noise Floor:


0.15 mV RMS (measured @ 500 sps)




0 to 32 KHz (unfiltered)


Preamp Gain (User Selectable):


x1 (0 dB), x4 (12 dB) & x16 (24 dB)


Maximum Input Signal:


x1 gain - 6.5 Volts peak to peak


Input Impedance:


100k Ohms


Digital Filter (User Selectable):


Low-Cut Filter - Disabled, 0.001-120 Hz

Filter Type - Linear or Minimum Phase


Anti-Alias Filter:


85% of the Nyquist frequency


Sampling Interval::


0.0156, 0.0313, 0.0625, 0.125, 0.250, 0.500, 1.00, 2.00, 4.00, & 8.00 milliseconds


Sampling Rate::


64,000, 32,000; 16,000, 8000, 4000, 2000, 1000, 500, 250, & 125 sps


Record Length:


Unlimited (with Continuous Recording)


Record Modes:


DAQlink (Triggered by External Event)

Sigma (Continuous Recording)


Trigger Accuracy::


±1 microsecond at any sampling frequency


Pre-Trigger Delay:


Up to 32 seconds


Post-Trigger Delay:


Up to 100 seconds

Physical features:

Internal Network:


100-BaseT Ethernet

Includes real-time data transfer

Internal CF-Card Memory:


16 Gbytes Standard (can be expanded)


GPS Interface Standard


Internal Clock synchronized to GPS time

GPS Time and Position saved with data


Optional External Removable Memory:


32 Gbytes (can be expanded)


Power Consumption (24 channels):


Less than 0.12 watts/channel


Power Requirements:


9 to 27 VDC


Included Tests:


Internal tests for verification of the instrument and the geophone spread




Dimensions: ..... 280 x 246 x 56 mm (11.0 x 9.7 x 2.2 inches)

Weight: .............. 2.0 kg (4.4 pounds)


Operating Temperature:


-40° to 85° C




Sturdy Milled Aluminum

Weatherproof seal - IP67

A complete DAQlink 4 Field System typically includes the following:

1 ... DAQlink 4 Seismograph


1 ... ........ Power Cable


1 ... ........ Ethernet Data Cable


1 ... ........ Trigger Port Cable


1 ... Hammer Switch with Extender Cable


1 ... “Y” Cable (for connecting to spread)


2 ... 12 Channel Spread Cables


24. Geophones (customer selects frequencies)


12V Battery (customer provided)



  DAQLink4 Brochure Download DAQLink 4 Brochure
  DAQLink4 Brochure Download DAQLink 4 Marine Acquisition Brochure
  DAQLink4 Brochure Download DAQLink 4 MASW Brochure

Seismic Source Co

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