inexpensive Gamma Raiation detector any good?

seems decent

· Detects dosage rates from .01 to 500. roentgens/hr wit +- 15% accuracy

· Detects high levels of Gamma radiation only

· Zero Adjust Knob

· Analog screen range 0-5 roentgens/hr (r/hr is multiplied by the appropriate
range scale as selected with range switch)

· Selector Switch Settings: Circuit check, Off, Zero (calibrate), X0.1 (0-.5 r/hr, X1 (0-5 r/hr), X10 (0-50 r/hr), X100 (0-500 r/hr)

· Unaffected by EMP (electro magnetic pulse), a phenomenon created by an atomic
detonation which renders most electrical systems inoperative.

· Ruggedized, Sealed meter is watertight, and resists shock and vibration damage.

· Civil Defense Department instrument issued for civilian use during and after nuclear
attack or reactor meltdown.

· Operates on standard D-Cell batteries (not included)

· Operates for over 150 hours continuous, much longer if used intermittently

· Manufactured in the early 60's

[link to store.colemans.com]

excuse the typo in the title

it seems these are circuit tested, and zero tested. But not calibrated. So probably a crap shoot

guess it would be wise to spend extra for a new geiger meter

You need a geiger tube. They're out of stock everywhere and they're expensive as shit on ebay.

i see. It seems these are just collector geiger counters, and not fully functional. They will power on, but without a "geiger tube"

If i had 900 dollars to spare i would get this

[link to www.scientificsonline.com]