The 102F contains only a single sensor capable of determining the position within a room at < 2 inch accuracy. The sensor performs a sweep of the environment using infrared sensors every 25 ms to constantly maintain a fixed position while surveying.

The 102F uses a 6 zone ZnS plastic scintillator detector, each zone having an area of 100 square centimeters, to optimize scanning area for faster results. Four adjustable wheels maintain the detector spacing from the surface.

The system utilizes a Ludlum counter capable of handling 6 zones (alpha/beta) simultaneously, all controlled by the on-board laptop greatly simplifying the quality check procedures and ensuring matched data.

A laptop computer running the ERG software provides controls to the motor, Ludlum counter, and data logging. The software is completely graphical and can be operated with little or no training

A computer controlled stepper motor ensures that the velocity of the cart is precisely maintained ensuring that the MDA is consistent and data are spatially distributed for processing. A lever on the handle bar engages and disengages the motor allowing the cart to be pushed freely.

The real-time display provides both the position and heading of the cart, as well as the spatial location of the collected data.

The software continuously analysis thousands of sensor measurements every 25 miliseconds to determine the location of walls and other planar surfaces within the room. Once detected, the surface is automatically used to maintain a precise position of the cart.

At any time during the survey, a different part of the room or building may be added to the perimeter map allowing for entire buildings to be surveyed with ease.