RadSearch is a device for measuring and quantifying radiation in the environment. RadSearch is capable of searching for, locating and quantifying radioactivity distributed on surfaces, within equipment and in pipe work and determining radiation dose in the environment. It consists of a detection head with a combined lanthanum bromide (LaBr₃) scintillation detector and photomultiplier, video camera and distance measuring laser range-finder system.  The RadSearch detector is mounted on a pan and tilt unit and a tripod to enable automated scanning of surfaces. It is particularly applicable to decommissioning and nuclear cleanup activities.


  • Lightweight, flexible, medium resolution system that can be readily deployed in the field and in contaminated buildings (deployment time < 10 minutes, one person)
  • Identifies a wide range of radionuclides and records gamma-ray spectra for archive purposes and potential future analysis
  • Directly measures gamma-ray dose rate and activity
  • Reduces operator exposure to radioactivity
  • Reduces operator exposure to radioactivity
  • Performs far field assay of objects and surfaces with 18° detector FOV with collimator barrel removed or 4° detector FOV with barrel fitted
  • Rugged PC with solid state drive and long battery life supplied as standard


  • Lanthanum bromide scintillation detector with medium resolution, high detection sensitivity and wide dose rate range
  • Tungsten shielded and collimated detector aligned with CMOS video camera
  • Energy range 30 keV to 2000 keV
  • High resolution CMOS camera with auto-focus
  • Laser range-finder (0.05 m - 65 m natural surfaces)
  • Detector environmental rating to IP65
  • Ethernet communication to external laptop computer
  • A single cable of up to 80 metres connects the detector with the remote rugged laptop computer (work station) - 40 m cable as standard
  • Detector head can operate without direct connection using 24 V battery and wireless Ethernet
  • Description

    RadSearch is a medium resolution gamma camera designed for locating and quantifying radioactive sources and contamination.

    RadSearch is readily transportable and is normally operated from a tripod, to which the internal pan and tilt mechanism is mounted.  It can be unpacked from the transport case and deployed in less than ten minutes.
    Alternatively, the detector head may be mounted on other devices, such as mobile carts. This enables the RadSearch to be deployed remotely into areas of high radiation background. RadSearch can contribute to reducing the exposure of operators to radioactive sources in decommissioning and radioactive cleanup operations.

    RadSearch employs an one-inch lanthanum bromide scintillation detector that provides the advantages of medium range resolution, high sensitivity and wide dose rate range. The lanthanum bromide detector is mounted in a tungsten shield with a small aperture tungsten collimator.

    All of the detection, motion control and analysis electronics are located in the detector head. The external components consist only of a power supply unit, which provides low voltage DC to the detector head, and a notebook computer on which the control and data analysis software is located. A single combined power and Ethernet cable links the detector head to the external electronics.

  • Specifications

    Lanthanum Bromide (1 inch x 1 inch)
    Energy Range
    ~30 keV to 2000 keV
    Collimator Viewing Angle
    18° full sensitivity (with collimator barrel removed); 4°(collimator barrel installed)
    Scanning Angle
    ±180° pan ±90° tilt
    <1 µCi to 0.5Ci for ¹³⁷Cs in detector field of view at 1 metre
    Dose Rate Range
    0-500mGy/h for ¹³⁷Cs
    Operating Voltage (V)
    110-230 VAC, 50-60 Hz (wide ranging) or 24 VDC
    53.2 kg (System, without transport cases)
    96.5 kg (System, with transport cases)
    20 kg Detector head (heaviest single component)
    117 lb (System, without transport cases) 212 lb (System, with transport cases) 44 lb Detector head (heaviest single component)