Multi-Crystal LB 2111 Gamma Counter by BERTHOLD TECHNOLOGIES GmbH & Co. KG

The Multi Crystal Gamma Counter LB 2111 is a remarkably simple system for gamma counting applications, delivering consistent and reliable results. Due to its compact footprint, the system fits into virtually any laboratory setting. The instrument can be operated in 2 different system configurations (standalone or PC-controlled). In stand-alone configuration, a keyboard and a monitor are connected to the system, while a serial matrix printer is used for data output. The Multi Crystal Gamma Counter LB 2111 is available as a 12-detector unit. To increase throughput, a second detector block can be added, resulting in a 24-detector system.

Highlights:

• Well-type detectors optimized for best counting efficiency: High-performance NaI well-type detectors minimize variance effects caused by sample volume and position to guarantee best counting efficiencies. The crystals cover an energy range from 10 to 510 KeV suitable to detect e.g. 125I, 57Co, 131I, 51CR, 75Se or 99TC.
• Effective lead shielding for consistent background and reduced crosstalk: A 6 mm lead shield surrounds each detector, providing 12 mm lead shielding between detectors to decrease interferences such as crosstalk between samples or background radiation.

Applications

RIA and IRMA immunoassays mainly with 125I, including, but not limited to:

• Thyroid hormones (T3, T4, TSH...)
• Reproductive hormones (LH, estriol, FSH, progesterone, testosterone)
• Drug abuse screening (THC, cocaine, amphetamine)
• Allergy (histamines, IgE)
• Vitamins (e.g. vitamin D)

Other applications with gamma-emitting isotopes:

• Infectious diseases (e.g. hepatitis)
• Cytotoxicity based on 51Cr release
• Kidney clearance with 99Tc
• Receptor binding
• Iron metabolism with 59Fe
• Neurotransmitters (serotonin, dopamine...)