Johnson Nuclear GSM-500 Radiation Survey Meter, 300/1500V DC, AA Alkaline Battery,

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About Johnson Nuclear GSM-500 Radiation Survey

Johnson Nuclear radiation survey meter is a portable and versatile survey meter that can function as a standard ratemeter, an integrating ratemeter and a peak hold ratemeter. This model also supports Geiger-Mueller Scintillation and tissue equivalent Micro-R probes. The four ranges change automatically and can be calibrated in Gamma Dose and CPM simultaneously. The high-efficiency microprocessor makes calibration fast and easy. Low battery condition, voltage and probe saturation conditions are indicated by red LED indicators. A selectable alarm, corresponding to probe sensitivity, may be activated or deactivated by a switch mounted on the front panel. The rugged housing and durable design provides years of reliable operation. Six AA batteries provided up to 200 hours of nominal operation. Probe is not included. Ranges: 0-.2, 0-2, 0-20, and 0-200 mR/hr (Sv units available), CPM: 0-500, 0-5000 and 0-50,000, and 0-500,000 cpm. Panel controls: off, measure, integrate, peak hold, cpm/dose, speaker, meter instant zero. Diagnostics: Visual low battery, detector, saturation, and HV out of range indicators. Calibration: CPM and Dose (Based on 137Cs calibration) - CPM dead time compensated, dose linearized. Adjustable high voltage: 300-1500 volts +/-1 percent. Response time : Optimized for each range. Audio output: on-off front panel switch, water and solvent resistant. Power supply: QTY 6 AA alkaline. Display: 3.5 inch Rugged water resistant panel meter, analog. Environmentally: stable from - 20 to 60 degrees C, moisture resistant. Electrical linearity: +/-2 percent F.S. Input sensitivity: 0.020V - 5V p-p, adjustable. ProbeConnector: BNC 90. Measures 4-5/8-inches length by 2-3/4-inches width by 7-1/4-inches height.