Baltic Scientific Instruments

HERCULES-FRM Free Release Monitor

Free release monitor for objects, containers, tools and materials in nuclear facilities, equipped with 16 or more plastic scintillators.

The HERCULES-FRM ensures compliance with clearance criteria by detecting even low levels of radioactivity. The stainless steel chamber construction guarantees durability and easy decontamination. The control box has a colour touchscreen, and emergency stop buttons are provided on both the control box and the measuring chamber.

  • Detection limit for Co-60 less than 300 Bq
  • 16, 24 or more plastic scintillators; HPGe detectors optional
  • Objects up to 1.2 × 0.8 × 1.0 m loaded from the front or back using forklifts or cranes
  • External and internal automatic conveyor and inbuilt scales
  • Preset measurement scenarios based on object type, geometry and weight, with all results stored in a database

No prices online – you will receive a quotation with price and delivery time. Need accessories? Mention them in your request.

Technical data

Detectors16, 24 or more plastic scintillators with PMTs; HPGe detectors optional
Energy range100 keV to 3000 keV
Detection limit< 300 Bq Co-60
Object sizeUp to 1.2 × 0.8 × 1.0 m (L × W × H)
Lead wallsNot less than 50 mm thick
Overall dimensions (L × W × H)5000 × 2300 × 2100 mm
Overall weight10000 kg
Operation temperature+10 °C to +35 °C
SoftwareTotal activity calculation, 3D visualisation of the object and activity distribution, alarms per radionuclide, self-diagnostics; Windows

Source: Baltic Scientific Instruments, Free Release Monitor HERCULES-FRM brochure (bsi.lv, retrieved November 2026). Full specifications are available in the documents.