The gamma counter Multi Crystal LB 2111 is a compact, robust and easy-to-use instrument that has been optimized for IRMA and RIA immunoassays based on gamma-emitting isotopes like ¹²⁵I, ⁵⁷Co, ⁵⁹Fe, ⁵¹Cr and ⁹⁹Tc. Thick lead shielding efficiently prevents crosstalk between samples.

The gamma counter can be operated in a stand-alone mode or it can be hooked to a personal computer. The Multi Crystal LB 2111 is available as a 12 detector unit. To increase throughput a second detector block may be added resulting in a 24 detector instrument.

 Application

RIA and IRMA immunoassays mainly with 125I:

• 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).
• Neurotransmitter (serotonin, dopamine…).
• …and many others.

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.
  

    Hightlights

  High Throughput with 12 or 24 detectors

  • Sample throughput is high as 12 tubes.
  • Extended model for 24 tubes.
  • 200 samples can be measured within 17 min (1 min counting time/sample).

   

  Detectors

  • Made of high-quality NaI well-type crystal providing.
  • Best measurement geometry for gamma emitters.
  • Energy range up to 500 KeV – suitable for the common gamma-emitting isotopes, e.g. ¹²⁵I, ⁵⁷Co, ⁵⁹Fe, ⁵¹Cr and ⁹⁹Tc.

  Lead Shielding for low crosstalk

  • Thick lead shielding (6 mm) around each of the detectors (12 mm total between detectors).
  • Efficiently prevents crosstalk between samples.

   

  Sample Racks

  • Sample racks facilitate loading of 12 samples at a time in a convenient way.
  • With multiple racks all samples can be prepared in advance.
  • In case a tube is contaminated, contamination stays in the rack and is never carried on to the instrument.