Model ASP-2A Detector

Alpha Scintillation Probe, 2 inch

Johnson Nuclear alpha probeThe Johnson Model ASP-2A probe is a Zinc Sulphide scintillation detector for alpha radiation survey (alpha only).  This probe is ideal for americium, thorium and plutonium. It may be used with all Johnson survey meters that require an external probe.


Compatibility: All Johnson Survey meters, GSM and DSM series
Operating Voltage: 600 - 900 vdc
Window Thickness: 0.5 mg/cm2
Efficiency: Americium 40% + 2PI
Range: 0-500,000 cpm
Energy Response: 3 MeV+ alpha
Sensitive Area: 2 inches
Finish: Polyurethane coated aluminum
Dimensions: 2-1/2" dia. X 12" long
Weight: 30 ounces
Environmental: Stable from -28ºC to 60ºC, 5% - 95% RH non-condensing

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