[Intl_DxMedPhys] Recommendation Needed: Ion Chamber Survey Meter for Shielding and Leakage Surveys

[Bob Kobistek]

I assume you’re looking for an ion chamber for its low-range capability. I always used the 451P but recently purchased a Raysafe 452. It’s not an ion chamber. It has a flat solid state detector with a pancake GM tube in the center. It has the low ranges you might be looking for, and it also can measure pulse height to estimate photon energy. The only downside is that, being a flat detector, you don’t get the angular response that you do from an ion chamber. But I like it, and I almost never use my 451P any more.


Robert J. Kobistek, MS, FACR, DABR, MRSE(MRSC™)
Medical Physicist
RJK Medical Physics, Inc.
440-463-7879

From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+bob=rjkmedphys.com at lists.osu.edu> On Behalf Of Imendra Ranatunge via Intl_dxmedphys_wd_osu_list
Sent: Tuesday, November 11, 2025 1:13 PM
To: intl_dxmedphys_wd_osu_list at lists.osu.edu
Subject: Re: [Intl_DxMedPhys] Recommendation Needed: Ion Chamber Survey Meter for Shielding and Leakage Surveys

Hi All, I’m looking to buy an ion chamber survey meter for shielding inspections and leakage measurements. What do you recommend? Imendra ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍
Hi All, I’m looking to buy an ion chamber survey meter for shielding inspections and leakage measurements. What do you recommend?

Imendra
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