Features: 1Coaxial Cylinder Structure: Boasts a steady and effective coaxial cylindrical configuration that provides superb performance stability. 2Glass Sealing: The radiation detector is sealed with glass for accuracy and safety, providing a high level of accuracy in readings. 3Easy Installation: Designed for convenience, ensuring steady power supply post installation, reducing the chances of operational hiccups. 4Broad Application: Ideal for detecting X ray, Y ray, and Hard Beta ray with great accuracy, ensuring optimal radiation safety. 5Versatile Connectivity: Supports connection to other devices, assuring the safety and stability of radiation data detection. Specification: Item Type: Geiger Counter TubeMaterial: Stainless steel, glass, alloyWeight: Approx. 55g / 1.9ozMeasurement Object: X rays, Gamma rays, Hard Beta raysSlope: 0.3%/V within the range of 380-460VMeasurement Range: 0.005-5CGy/hEnergy Response: Within 30% (50KeV-3MeV)Accuracy: 0.01uSv/hMeasurement Temperature: -20C-55CLifespan: >1x10^10 pulsesProduct Size: 51.5x6.5mm / 2x0.3in(2mm tolerance) Package List: 1 x Geiger Counter Tube1 x Manual Note: When using the counting tube, make sure to keep it clean: avoid impact or mechanical damage: do not come into contact with strong alkalis.