Wm. B. Johnson GSM-10S Portable Radiation Survey Meter w/ Detector Probe
Used. Tested and working. Shows cosmetic wear from previous use. See photos.
Wm. B. Johnson & Associates GSM-10S portable survey meter with cylindrical detector probe and analog display.
The probe is an end-window Geiger-Müller detector, most likely the Wm. B. Johnson GP-200 or an older equivalent. The perforated metal grille protects the thin detector window underneath. This style can detect alpha, beta, and gamma radiation.
Unit was tested and is operational.
Only what is pictured is included. Does not include glazed cup (that was for testing purposes only).
