Please search for XG-1684 Spark Gap Tube  for Cs-137

TG-36 was produced around the late 1960s and at that time contained one microcurie (37kKbq) Cs-137. Since the half-life of Cs-137 is 30 years, the tube still measures over 900 CPM with a pancake tube and can still be used as a Geiger counter-check source as well as a calibration source for gamma spectroscopy.

In the second picture, the TG-36 is being measured with the GMC-300E Plus.

In the third picture, the tube is being measured with a pancake probe on the GMC-600Plus.

Shipped only with USPS Parcel Select Ground (2-8 days), wrapped in plastic, aluminum foil, and bubble wrap in a box big enough to bring the parcel surface activity below the 0.5mR/hr shipping limit.

The buyer must assume responsibility for this item and use it according to its intended purpose. It is illegal to remove the Am-241 sample from the ion chamber. Keep this away from children and store it at least thr feet away from anywhere anyone spends a lot of time.

This listing meets the requirements of NRC 10 CFR 40.22

It also meets U.S.P.S domestic shipping requirements for exempt limited quantities of class 7 materials according to –347.22 “are eligible under 49 CFR to be shipped as excepted packages for limited quantities” and –Exhibit 347.22 Activity Limits– and also –173.435– Table of A1 and A2 values

This item will conform to the USPS shipping restrictions when shipped.

Geiger counter not included.

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WARNINGS and NOTICES ! (also serves as FAQ’s)