• The Model 252 was primarily designed as a security type area radiation monitor intended to watch over highly radioactive materials confined to a protected area. The system incorporates an energy compensated GM detector with a detection range of 0.1 µSv/hr to 10 Sv/hr (0.01 mR/hr to 1000 R/hr). It also accepts an input signal from an external security type sensor for monitoring doors, seals, or RFIDs.
• If the ambient radiation level ever exceeds or falls below set limits, or if the optional remote security sensor is triggered, an alarm is immediately posted through an ethernet connection and via a relay output.
• A network of up to 50 security type area monitors can all be monitored simultaneously using Ludlum’s Webpage and Service Software. This system monitors all areas in real time, logs data, and posts any alarms. It can additionally send e-mails to responsible parties automatically and capture picture images if optional ethernet cameras are employed.
• While the Model 252’s design is security driven, it can also serve as a simple, low cost area radiation monitor reporting the ambient radiation levels over an ethernet network. The instrument itself has no local readout or display other than a simple LED signalling, whether the instrument is functioning properly or not. Optional alarm annunciators can be added to alert nearby personnel if required.

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