Several Eberline gas proportional alpha, beta, gamma probes and Ludlum scintillation probe Mylar window accessories, including: (1) Qnty 2, Eberline AC-23 gas proportional hand held alpha, beta, gamma, detectors, each overall size 7 inches by 11.5 inches. Each probe active area 330 sq. cm., open area 250 sq.
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