… and Mobile Laboratories
A Superior All-In-One Solution. . .
• Needs no LN2 — ever: because of the “run forever” Stirling-cycle cooler.
• HPGe detector element encapsulated in a high reliability cryostat, with no need ever to thermal cycle
on partial warm up.
• High stability digital signal processor built right in — no need for external electronics.
• Powered from a small 10–17 V DC supply, with a low waste heat output <20 watts: ideal for use in
confined spaces and mobile labs.
• Built-in battery back up keeps LDM running for up to 3 hours in the event of power failure.
• Near silent in operation.
The LDM100-GEM is an all-in-one HPGe gamma-ray spectrometer for use in a variety of
applications ranging from counting labs to mobile laboratories.
It requires only two electrical connections to be ready for use: a source of DC power (usually from
the supplied AC/DC mains power adaptor, but equally well from a vehicle battery) and a USB
connection to the host computer. There are no interconnecting cables required between subsystems.
Liquid nitrogen refrigerant IS NOT REQUIRED to cool the HPGe detector. The high reliability
miniature Stirling-cycle cooler takes care of this. The cooler has the additional benefit of being “all
attitude,” that is to say unlike systems which employ liquid refrigerants, it can be moved at no risk,
even while operational, important for mobile laboratory applications.
All LDMs are based on the same technology employed in the ORTEC Detective line of HPGe
nuclide identifiers. The ultra-reliable hardened cryostat and robust Stirling-cycle coolers, field-proven
hundreds of times over, are now available for a laboratory instrument. The hardened cryostat design
allows removal or reapplication of power at any point of the cool down cycle. No longer does a
partially warmed detector need to be cycled back to room temperature before cooling restarts.
Installation is simplicity itself — just attach to the stand and slide the detector up into the lead shield.
Plug in the power cable and attach the USB cable to a PC or laptop. The initial cool down takes less
than 12 hours, and you are ready to calibrate and count samples.
• All-in-one Integrated Package — rugged and compact with no interconnections — quick and easy
to install.
• High Speed USB 2.0 connectivity: plug and play.
• Battery Backup — the internal battery provides up to 3 hours of operation in the event of a power
failure, battery charge is maintained by an internal battery charger circuit inside the instrument
housing.
• High Sensitivity — large (40% relative efficiency) HPGe detector.
• Hardened Cryostat — the HPGe crystal is housed in an all-metal-sealed, ruggedized cryostat, and cooled by a highly reliable
miniature Stirling-cycle cooler. NO molecular sieve is used.
• High Stability Digital Signal Processor — built in to the system — no need for external electronics, just DC power and a USB
connection.