Outdoor monitor or vehicle monitor detectors.
7866 cm3 (480 in3) plastic scintillation detectors with 0.33 cm (0.13 in.) lead shielding in weathertight housings
These detectors can be used with the Ludlum 375P Waste Monitor System or any other meter with adjustable high voltage.
The picture shows both detectors, they are sold individually. $1500/ea