Eberline Inline remote detector- Model AMS4 OPT7 radiation in air detection system.

Inline Sampling Head
Size: 24.1 H x 23.6 W x 16.3 D cm (9.5 H x 9.3 W x 6.4 D inches).
Detector Type: 2 each 2.5 cm (1”) diameter sealed proportional (Ar/CO2), 80 kPa (600 Torr) fill pressure
Window: 2 to 3 mg/cm2
, mica.
4π Efficiency: 5.75% 60Co, 12% 90Sr/ 90Y (nominal)