Ludlum Model 43-10-4 Beta Sample Counter with integral tray for samples

APPLICATION: beta radiation sample counting
RADIATION DETECTOR: ZnS(Ag) adhered to plastic scintillation disc
WINDOW: 0.4 mg/cm²
SAMPLE HOLDER: anodized aluminum tray with sample ring to allow for 1 in. (2.5 cm) or 2 in. (5.1 cm) diameter samples
SAMPLE SIZE (maximum): 2 x 0.4 in. (5.1 x 0.9 cm) (Dia x L)
EFFICIENCY (4π): 37% – ²³⁹Pu; 32% – ²³⁰Th; 39% – ²³⁸U; 5% – ¹⁴C; 27% – ⁹⁹Tc; 29% – ¹³⁷Cs; 26% – ⁹⁹Sr/⁹⁰Y

BACKGROUND: alpha ≤ 3 cpm, beta ≤ 80 cpm
PHOTOMULTIPLIER TUBE: 2 in. (5.1 cm)
OPERATING VOLTAGE: 500-1200 volts
CONNECTOR: series “C” (others available)
SIZE: 9.3 x 4.5 x 9.3 in. (23.6 x 11.4 x 23.6 cm) (H x W x L)
WEIGHT: 4.1 lb (1.9 kg)