Professional Geiger Counter with Dosimeter — Alpha, Beta, Gamma & X-Ray Detection

Every radioactive decay is a quantum event — this Geiger-Müller tube converts each ionization cascade into a countable pulse, making the invisible visible.

The Geiger-Müller tube operates on avalanche ionization: incoming radiation ionizes gas molecules inside the tube, and the resulting ions are accelerated by a high-voltage field (typically 400–900 V) until they trigger a cascade of secondary ionizations — a Townsend avalanche — producing a measurable electrical pulse. Unlike scintillation detectors, the GM tube is sensitive to all ionizing radiation types: alpha (via thin mica end-window), beta, gamma, and X-ray. The cumulative dose function integrates pulses over time, converting counts to Sievert units using isotope-specific conversion factors built into the firmware.

• Detects α (mica window), β, γ, and X-ray; dose rate 0.01–999 μSv/h
• Alarm threshold user-configurable; audible + vibration + LED warning modes
• Cumulative dose tracking (μSv, mSv) with time-stamped data logging
• USB-C rechargeable 2200 mAh; backlit OLED display with real-time CPM graph

Every purchase directly funds independent physics research at the Golden Physics Project.

Expert Analysis

A Geiger-Müller tube sensitive to all four ionizing radiation types — alpha, beta, gamma, and X-ray — is a meaningfully different instrument from the cheap beta/gamma-only devices sold for casual hobbyist use. Alpha detection requires a thin-window tube, because alpha particles are the heaviest ionizing radiation and are stopped by millimeters of air or a solid metal tube wall. Full-type sensitivity means this instrument can characterize natural uranium ore, thorium-bearing minerals, and alpha-emitting contamination that cheaper instruments simply cannot detect. This is the specification that professional radiation safety personnel and serious mineral collectors actually require.

The integrated dosimeter function accumulates dose in μSv over time, making this instrument useful for extended monitoring in elevated-background environments — granite quarries, high-altitude flight, medical imaging facilities, and sites with naturally occurring radioactive material. The OLED display with real-time CPM graph gives immediate visual feedback on count rate variations, while the configurable alarm threshold protects against sustained exposure without constant attention. USB-C recharging and 2200 mAh capacity means extended field use without power anxiety.

At this specification level, this is the instrument that physicists, radiation safety officers, and serious geological fieldworkers actually carry. The combination of alpha-capable thin-window detection with full dosimetry and data logging in a compact unit represents genuine professional-grade functionality at a price previously available only to institutional buyers. For citizen science applications — radon mapping, mineral characterization, or environmental monitoring — this is the correct tool.