GEIGER COUNTER / RATEMETER
Mains powered Geiger Counter requires a remote GM tube in a holder connected by standard BNC plug. Ideal for classroom use with sloping front panel and large red LED display. The large sensitive tube is of the 'thin mica window' type and detects Gamma, Beta and high energy Alpha particles. Tube voltage is adjustable to 600V and an in-built loudspeaker with volume control permits counts to easily be heard. Counts can be selected to be continuous, counts over pre-set times, or Rate displayed as counts/second.