survey meter check sources

["Robert R. Milwicz" <milwicz@arundel.Princeton.EDU>]

Each of our survey meters have a small check source affixed to the
side of the instrument so that the operation of the meter can be
easily checked before use. We presently use a small piece of U covered
by a metal foil but are considering other sources.

The questions I have are:

What do you use as your check source?


What is the cost?


Who sells it?


Thanks ahead of time for the responses. Please e-mail to me directly.
Also thanks to the individuals who responded to our previous inquiries
about the use of sources in health physics operations and DOT
training.


BOB Milwicz
Princeton