PNAI Series


The PNAI detection unit is based on a NaI(Tl) scintillator probe, designed for high sensitivity gamma radiation measurements; these probes best apply to the detection of small activity concentrations in air and in gas exhausted from controlled zones.

The series comes with two detectors versions: PNAI with 2” x 2” crystal dimensions; PNAI/3 with 3” x 3” crystal dimensions.

The NaI(Tl) scintillator includes a 2” 14 pins photomultiplier, connected to the ELSE NUCLEAR photomultiplier base model PAD; the PAD provides power supply, preamplification, output signal discrimination and digital conversion, allowing to connect a reading unit and manage the acquired data.

PNAI series detectors can be used in stand-alone connected to ELSE NUCLEAR's ratemeter or as a part of a monitoring system.

Aluminum airtight holders with mounting flange for duct mounting are available as accessories (PNAI/ATH or PNAI/3/ATH).

The PNAI probes can also be connected to a multichannel electronics module, to be used in MISTRAL XM air/stack monitoring systems: this option is called PNAI-MC.

Additional Info

  • Main features:
    • High sensitivity gamma detector
    • Connectable to stand alone rate-meters or ELSE NUCLEAR monitoring systems
    • Specifically designed for real time or sampled stack monitoring
    • Compact dimensions
    • Built-in signal processing electronics
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