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Quantulus GCT Liquid Scintillation Counter

The Quantulus GCT is a liquid scintillation counter for ultra low-level sensitivity that can fit into any lab. It has extremely high sensitivity and unmatched detection of low-level Alpha and Beta radioactivity which makes it an ideal solution for the most demanding applications.

For research use only. Not for use in diagnostic procedures.

Part Number A622000
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21 CFR Part 11 Compatibility optionally available. Please consult your radiometric detection specialist.


The Quantulus GCT liquid scintillation counter is a fully loaded benchtop instrument with unsurpassed performance for measuring man made, cosmic and other natural radionuclides. Patented GCT technology combined with BGO guard background reduction accurately measures near-background sample activity.



Exclusive Standard Features

  • Patented Bismuth Germanium Oxide (BGO) and Guard Compensation Technology (GCT) – Enhances discrimination against background yielding the highest E2/B values available in a multipurpose liquid scintillation counting system
  • Time-Resolved Liquid Scintillation Counting (TR-LSC) – For high sensitivity, low background liquid scintillation counting
  • QuantaSmart Software – A robust multitasking, easy networking environment with unlimited assays in a secure multiuser environment
  • Alpha Beta Separation – Uses Dual Pulse Shape Analyzer (PSA) Discriminator and Histogram to improve accuracy for mixed and unknown samples
  • SpectraWorks 2 – Spectral analysis package that determines optimal counting regions, and calculates figure of merit automatically
  • Enhanced Instrument Performance Assessment (IPA) - Monitors performance metrics for the life of the instrument
  • Replay – Reanalyzes sample counts without recounting samples
  • Dynamic Color Correction – Ensures accuracy of tracking lower energy sample spectra over a wide quench range
  • Auxiliary Spectrum Memory – Stores rejected events for future analysis
  • Bi-directional Sample Conveyer – Has a capacity of up to 408 (20 mL vials) or 720 (4 or 7 mL vials)
  • VarisetteSample cassette for intermixing vial sizes without special adapters
  • Operational-status LED Indicator – For clear assay status updates at a glance

Additional Standard Features

  • Luminescence Detection flags percent luminescence to alert user of possible sample problems
  • Luminescence Correction adjusts for chemiluminescence interference
  • Direct DPM determines single-label DPM in any cocktail without the use of quench standards
  • Temperature Control maintains optimum conditions for a variety of samples
  • 60 Quick Count protocol flags with the flexibility to define unlimited assays
  • Fold-away ergonomic arm adaptable to enter data either sitting or standing
  • Built in Computer with Windows 10 Operating System

Looking to replace an old instrument? Click here for more information.

For additional information on liquid scintillation counting, visit here.


21 CFR Part 11 Compatible Yes
Depth 112.0 cm
Height 47.0 cm
Length 112.0 cm
Portable No
Weight 238.0 kg
Width 103.0 cm
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