MKS-1E Professional Geiger Counter – 4x SBM-20 + 1x Beta-2 Mica Window Tubes

Serious radiation detection setup.

This MKS-1E comes with four SBM-20 tubes plus a Beta-2 mica window tube—so it’s sensitive to gamma, beta, and even some alpha.

New, unused, ready to scan.

Great for hobbyists, preppers, or anyone checking sources or contamination.

No MPN listed, but it’s a known Soviet-style design.

If you’re building a diy geiger counter or need a backup probe array, this is it.

Mica window opens up low-energy beta detection that standard tubes miss.