Quantulus GCT 

Advanced low-activity time-resolved liquid scintillation counter for multiuser environments. Incorporates patented GCT and BGO guard technologies for ultra-low background detection. Designed for environmental, industrial, and research applications involving radionuclides.

• Status: Active
• Country: USA
• Isotopic: Yes
• Type of measurable elements: Radioactive isotopes
• Measurable isotopes/elements: ³H, ¹⁴C, ⁹⁰Sr, ²²²Rn, ²²⁶Ra, ¹³⁴Cs, ¹³⁷Cs, and others
• Sensitivity : Enhanced by dynamic color correction and luminescence adjustment
• Background : Near-background levels using BGO guard technology
• Detection type : Photomultiplier-based coincidence detection with dual PSA discriminator
• Energy range : 0–2000 keV
• Efficiency normal count Mode : ³H: >58%, ¹⁴C: >94% (minimum acceptable efficiency)
• Figure of Merit (FOM (E2/B) : ³H: >400, ¹⁴C: >1000 (normal mode); ³H: >880, ¹⁴C: >3500 (super low-level mode)
• Observed performance : ³H E²/B > 131,000; ¹⁴C E²/B > 1,030,000 (optimal performance conditions)
• Alpha/beta separation : Yes, with enhanced PSA histogram and dual PSA discriminator for mixed samples
• Sample capacity: Up to 408 × 20 mL or 720 × 4/7 mL vials with Varisette™ cassette system
• Gas supply: Not required
• Power Requirements and Consumption : 100–240 VAC, 50/60 Hz; Power consumption: <800 VA
• Environmental requirements : Operating temperature: 15–30°C; Humidity: 30–80%
• Dimensions and Weight: 103 cm W × 47 cm H × 112 cm D; Weight: 238 kg (523 lbs)