These are nice looking Ludlum Model 1000 scalers. They have adjustable HV up to 2500V and can run GM detectors, proportional counters, and scintillation detectors such as NaI. A scaler is a must have item for science experiments or for assay of radioactive material in the environment. A hand held GM is OK, but for measuring variations in background radiation, or for finding out if something is contaminated a scaler is the way to go.
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These are the same types of meters used in laboratories and nuclear stations across the country. We offer unconditional warrantees with all equipment we sell.
5 decades counting
Adjustable HV 0-2500V
Gross counting scaler
120VAC required for use (these come with modern 3-prong power cords that are the usual ones you see on the back of computers).
C type connectors.