Features 1、MEASURING OBJECT: This Geiger counter tube can be used for measuring X rays, γ rays, and β rays, which is convenient and practical. 2、GLASS MATERIAL: The Geiger counter tube is made of excellent glass material, with high transparency and good corrosion resistance. 3、FOR DIY PROJECTS: This glass Geiger counter is suitable for various nuclear radiation detection application, and suitable for DIY projects. 4、COMPACT SIZE: The radiation detector tube is compact and lightweight, easy to install and carry, convenient to use anytime, anywhere. 5、RELIABLE OPERATION: With fine workmanship and strict testing, this Geiger counter tube has stable performance, ensuring reliable operation. Specification Item Type: Geiger Counter Material: Glass Slope: ≤0.3%/V in the range of 380-450 Measurement Range: 0.005-5 cGy/h Energy Response: Within ±30% (50KeV-3MeV) Accuracy: 0.01uSv/h Starting Voltage: ≤350V Discharge Voltage: ≥550V Measurement Temperature: -20℃-55℃ Lifespan: >1x10^10 Pulse Package List 1 x Geiger Counter