HANDHELD PERSONAL NUCLEAR RADIATION DETECTOR. Fast, Accurate and Easy To Use. Detects a broad spectrum nuclear radiation, including low energy background radiation. USA Support. Assembled in the USA. ANSI-STD N323A CERTIFICATION READY - Our ANSI-STD N323A certification is available at additional cost from the manufacturer. The NRC certification certifies your Geiger counter has passed ANSI-STD N323A calibration. AMERICAN MADE GM TUBE: Detector Sensitivity LND712: Detects Alpha particles above 3 MeV in energy. Beta radiation above 50 KeV; X-Ray and Gamma radiation above 7 KeV. COUNTING RESOLUTION AND RANGE: 1 Count Per Minute (CPM) - 10,000 Counts Per Second (CPS). RADIATION RESOLUTION AND RANGE: 0.001 mR/hr resolution / 1,000 mR/hr Range (Imperial measurements); 0.01 uSv/hr resolution - 10 mSv/hr range (Metric) The GCA-06W is a handheld personal nuclear radiation detector. A proven track record for detecting nuclear radiation in school physics lab, industrial settings, transport containers, top soil, granite table tops, scrap metal, oil fields, objects and interior spaces. The external wand makes it easier to search materials and surfaces for radioactivity. The GCA-06W detects Alpha, Beta, X-ray and Gamma radiation above 3 MeV, 50 KeV, and 7 KeV respectively. Easy to read LCD is a 2 line by 16 characters that provides a current count and radiation level readout. Simple front panel instrument controls make the GCA-06W easy to use. Toggle switches control all the front panel options. User can select a time period, type of measurements (Imperial or Metric). Measurements (counts per second) are converted into radiation levels (mR/hr or mSv/hr). Time selection switch allows Counts Per Second (CPS) or Counts Per Minute (CPM) mode. Factory calibrated using an NIST traceable source to insure measurements. Our ANSI-STD N323A certification is available at additional cost from the manufacturer. The ANSI-STD N323A certification certifies your Geiger counter has passed ANSI-STD N323A calibration using a NIST traceable source from an independent US licensed laboratory conforming to United States Nuclear Regulatory Commission ANSI-STD N323A regulations 10-CFR-34 and 10-CFR-35 standards (available at additional costs through the manufacturer). Options: Jack for Headphones or External Speaker. External Power Supply included. 3.5mm Data Port for WIN PC and microcontroller interface. The WIN PC program requires optional 3.5mm to USB data cable. Secondary indicators; audio (clicks) and visual (LED) included. 9V battery (mobile operation) not included.