LN2 Auto Fill Controller Model 326A for Germanium Detector Dewars, Rear BNC Status Lines

Condition

Used and in good condition. It was visually inspected and tested, and it powers on and switches as expected. Front markings legible: Princeton Gamma-Tech, LN2 Auto Fill Controller, Model 326A. Rear markings: Model 326A, Cryostat, Disable Fill, External Fill, Ready to Fill, Filling, Power, Fuse 2ASB.

Ships same or next business day from our Idaho warehouse. Selling online since 1999.

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Product Overview

Built in Nuclear Instrumentation Module (NIM) width, Princeton Gamma-Tech's 326A manages liquid nitrogen fills for a cooled detector. Set the mode switch to Auto and it runs the fill cycle, lighting Filling while nitrogen flows and Overflow Full when the dewar is topped off; a Detector Low lamp warns when the level drops. Manual Fill and Stop Fill buttons on the front handle the exceptions. It powers itself from AC through an attached cord rather than from the NIM bin.

Key Features

Auto and Off mode switch with lamps
Manual Fill and Stop Fill pushbuttons
Filling, Overflow Full and Detector Low lamps
Rear Cryostat connector
Rear BNC lines: Disable Fill, External Fill, Ready to Fill, Filling
Two attached cords, one with a three-prong plug, one ending in a three-slot outlet
Rear fuse, marked Fuse 2ASB

Applications

Keeping an HPGe detector cold between shifts without manual dewar fills
Swapping in a working controller where an old 326A has failed
Signaling fill status to a data system or alarm over the rear BNC lines

Frequently Asked Questions

What do the rear BNC connectors do?

They are labeled Disable Fill, External Fill, Ready to Fill and Filling, for connecting the controller to other lab electronics.

Has it been tested?

It powers on and switches as expected.

Will it take over from a failed 326A without rewiring?

Yes. Front and rear panels both read Model 326A, and the rear carries the same Cryostat connector, the four labeled BNC lines and attached power cords, so the existing connections move straight across. Flat-rate shipping in the lower 48, and orders over the free-shipping line ship free.

The Detector Low lamp is the one nobody wants to see on Monday morning. Plug this in and let the controller worry about it.

Brand	Princeton Gamma-Tech
MPN	326A

NIM BIN Princeton Gamma-Tech 326A Liquid Nitrogen Auto Fill Controller

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