The Model 19A is a highly sensitive gamma microR meter with an internal 2.5 x 2.5 cm (1.0 x 1.0 in.) NaI detector. It has an alarm and a logarithmic meter scale.
The Model 19A is a highly sensitive gamma microR meter with an internal 2.5 x 2.5 cm (1.0 x 1.0 in.) NaI detector. It has an alarm and a logarithmic meter scale.