Introduction
The portable Model 700-Series radiation surveillance and measurement system was developed to give end users like first responders a simple tool to quickly locate any abnormal levels of radioactivity and accurately identify the isotopes present. It additionally offers several advanced features for well trained experts seeking to perform more detailed analysis either in the field or in a laboratory. Connection to a PC is available via a built-in Ethernet connection where stored or real-time collected data can be processed by optional isotopic analysis programs.

The 700-Series employ time-slicing and patented QCC technology that delivers improved energy resolution, real-time background subtraction and the highest degree of sensitivity. These units have a trace amount of K-40 embedded to provide gain stabilization and self-calibration. All captured spectra data are stored to a removable compact flash card in ANSI N42.42 standard format. This convenient storage medium facilitates quick removal for review elsewhere as well as allowing virtually an unlimited number of spectra to be collected while in the field.

These instruments were the very first ones designed to meet ANSI N42-34 Performance Criteria for Hand-held Instruments for the Detection and Identification of Radionuclides. The design was also optimized for portability, user-friendliness and rugged use out in the field. The ergonomic shape and excellent balance allow them to be operated with a single (gloved) hand with easy thumb access to a set of very large tactile type control buttons. The 3.5” color LCD is a transflective type, which actually brighten with use in bright sunlight conditions that typically render other type of LCD’s useless. The use of color on the different displays is intelligently applied to depict the difference between gamma and neutron data, signify the appropriate activity levels for capturing spectra, labeling isotope categories and presenting alarms. Audible feedback and voice alerts further enhance the user-interface. The instrument is powered with rechargeable NiMH batteries delivering up to 8 hours of portable use and comes with an adaptor that accepts common alkaline batteries in the event backup power is warranted.