Product Details:
RCA 6655A PMT (Photo Multiplier Tube) assemblies include a 1" x 1.5" NaI (Sodium Iodide) crystal mounted to the flat PMT face with optical grease, a 14 pin socket and voltage divider wired for negative high voltage, all mounted in a 2.5" x 9" aluminum casing. High voltage signal and ground wires exit the casing. These are used but have been checked and verified 100% operational by a qualified lab.Excellent radiation detectors at quite a savings to boot. The resistor string can be easily changed for positive high voltage excitation. We have a limited quantity so don't pass this opportunity to conduct your own spectrum energy analysis today.

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