This fully portable Geiger Counter with inbuilt GM tube and LCD display is powered by 3x ‘AA’ cells. ‘ Lo Batt’ warning is provided. The large sensitive tube is of the ‘thin mica window’ type and detects Gamma, Beta and high energy Alpha particles. The instrument is light, very robust and is useful for both field work and the classroom. Other models are available with remote tube. Tube voltage can easily be adjusted up to 600V. Counts can be selected to be continuous, counts over preset times, or Rate displayed as counts/Second. Socket provided for standard 240/12V.AC. Plug Pak to run the unit if cells flatten.