The SIR® 4000 is GSSI’s first high-performance GPR data acquisition system designed to operate with analog and digital antennas. This evolutionary step allows true versatility and flexibility by supporting a wide range of users, beginner to advanced, in numerous applications.

The SIR 4000 incorporates advanced display modes and filtering capabilities for ‘in-the-field’ processing and imaging. Fully integrated, the system provides a simple user interface, plug-and-play GPS integration, and convenient data transfer options.

Ideal for multiple applications; utility designation, concrete inspection, mining and geology, environmental assessment, archaeology and forensics.

More information: SIR 4000 Brochure


Flexible Design

  • Overall system flexibility - compatible with all GSSI antennas (analog and digital)
  • Several deployment options for in-field accessibility
  • Convenient file transfer options

Integrated System

  • Windows® operating system
  • Simple, user-friendly interactive graphic interface
  • Ruggedized, high-resolution 10.4” LED display
  • Plug-and-play GPS capability
  • Internal, 32 GB data storage
  • IP-65 rated

Deliver Results

  • Advanced real-time filters
  • Up to 800 KHz transmit rate (200 KHz transmit rate in USA and Canada)
  • 32 bit output data format
  • 20,000 nanosecond max time range
  • Convenient file transfer options
  • FCC, CE and RSS-220 compliant

New User Interface Experience

GSSI SIR 4000 Home Screen

SIR 4000 home screen

The SIR® 4000 comes with a new user interface offering a better user experience. The startup screen is a very simple interface to navigate, where users launch application specific modules, last used settings, start new projects, or playback data from previous projects. In addition, one can configure the SIR 4000 to personalized settings including language, units, and color themes. Using the knob or soft key features, users can select various menu options easily and efficiently.

Improved Data Collection Mode

GSSI SIR 4000 GPR data example

SIR 4000 expert mode in data collection screen

The SIR 4000 incorporates many new features, including new display modes and filtering capabilities for in-the-field processing and imaging. Users have the ability to change display gain and filters in real-time while collecting data. Additionally, users can change the scale, add reference marks, and personalize the color display. Filters include hyperbola matching for data migration, surface position tracking, signal floor tracking and adaptive background removal.

Redesigned Quick 3D Mode

SIR 4000 Quick 3D data excample

SIR 4000 Quick 3D mode

The redesigned Quick 3D mode offers the capability to collect and create stunning 3D data files. Quick 3D displays data as fully rotational three dimensional cube in real-time, allowing for powerful in-field data interpretation.


Antennas Compatible with all GSSI antennas
Number of Channels

Records data from 1 single-frequency antenna or 1 dual-frequency antenna

Data Storage 32 GB
Display Enhanced 10.4" LED display with internal high brightness, Active matrix 1024 x 768 resolution and 32-bit color
GPS Data logged internally
Display Modes Linescan, Linescan plus O-scope, Wiggle trace Full 3D, 256 color bins are used to represent the amplitude and polarity of the signal
Languages English, Chinese, Japanese, French

Data Acquisition

Data Format RADAN® (dzt)
Output Data Format 32-bit
Scan Interval User-selectable, up to 4000 scans/sec
Number of Samples per Scan 256, 512, 1024, 2048, 4096, 8192, 16384
Operating Modes Continuous (time) or survey wheel (distance triggered) or point mode
Time Range 0-20,000 nanoseconds full scale, user-selectable
Gain: manual adjustment from -42 to +126 dB
Number of segments in gain curve is user-selectable from 1 to 8
Standard Real-Time Filters Infinite Impulse Response (IIR) - Low and High Pass, vertical and horizontal
Finite Impulse Response (FIR) - Low and High Pass, vertical and horizontal
Advanced Real-Time Filters Migration, Surface Position Tracking, Signal Noise Floor Tracking, Adaptive Background Removal
Automatic System Setups Storage of an unlimited number of system setup files for different survey conditions and/or antenna deployment configurations
Automatic Antenna Recognition Automatic recognition of Smart Antennas to allow maximum compliant transmit rate


Operating Temperature -20°C to 40°C external (-4°F to 104°F)
Battery Inspired Energy Ni2040ED, 3 hour runtime (battery life dependent on level of display brightness)
Transmit Rate Up to 800 KHz (International) US/Canada and CE rates depend on antenna model


Available Ports Antenna inputs analog and digital (one at a time), DC power input, Serial RS232 (GPS port), Accessory connector, HDMI video output, Ethernet to PC, USB 2.0 port, mini USB
Ethernet RJ45 100BT Ethernet
USB Host USB host with external keyboard support, USB flash drive support and USB HUB support


Dimensions 14x10x2.75 in (36x25x7 cm)
Weight 10 lbs (4.53 kg) including battery
Relative Humidity <95% non-condensing
Storage Temperature -40°C to 60°C (-40°F to 140°F)
  • Shipping Weight: Approx 26 pounds
  • Shipping Size: Approx 9 x 18 x 21in

Please contact us for a price