Feature: 1. 3 in 1 Testing: Comes with 0.005‑5cGy/h wide measuring range of radioactive substances, the Geiger counter can detect hard β, γ and X rays. 2. Better Display: Designed to have high accuracy and high sensitivity, the tube tester supports clear display on the test result, easy to read. 3. Flexible Using: Can be widely used in detecting domestic nuclear radiation, industrial nuclear radiation, treatment nuclear radiation and more. 4. Good Materials: Adopting premium glass and stainless steel materials, the Geiger counter tube is not easy to malfunction and also very durable. 5. Simple Carrying: Light in weight and compact in size as well, the Geiger Miller tube is very convenient to carry for both indoor and outdoor use. Specification: Item Type: Geiger Tube Material: Glass, Stainless Steel Measurement Object: X rays, y rays, hard Belta rays. Flat Slope: ≤ 0.3%/v within the range of 380-450. Measurement Range: 0.005-5cGy/h Energy Response: Within ± 30%, 50KeV-3MeV. Accuracy: 0.01uSv/h Starting Voltage: ≤ 350V Discharge Voltage: ≥ 550V Product material: Stainless steel cathode. Measurement temperature: -20℃-55℃ Lifetime: >1 x 10^10 pulses. . Package List: 1 x Geiger Tube