The Hidex ULLA combines existing technology, latest innovations and modern usability
The Hidex ULLA addresses the increasing demand for a truly low-level liquid scintillation counter which has been absent since the discontinuation of the Quantulus 1220. Applications in hydrogeology when mapping global clean water resources, detection of biogenic carbon content in materials, or measuring trace concentrations of alpha and beta isotopes in soil, food, and drinking water require absolute accuracy and precision. Hidex have developed the next state-of-the-art counter to meet these requirements.
Ultra low background and triple coincidence detector
The ULLA achieves low background with a heavy passive lead shield and geometrically optimal active guard, which surrounds a modern triple-PMT detector facilitating exceptionally high counting efficiency, luminescence free counting, and absolute activity counting by TDCR, a metrology technique.
Vials are deionised prior to loading to remove static electricity. Cooling modules maintain the sample stability and in optimum temperature for the highest counting efficiency possible. The detector chamber can be flushed with nitrogen to remove Rn-222 gas, often found in underground mines, homes, and buildings near mountainous environments.
Exceptionally high counting efficiency
The ULLA utilizes three PMTs aligned at 120° from each other. Optimum detection geometry yields better detection geometry than conventional double coincidence detectors.
Example: Efficiency for 3H in 20ml vials
Hidex triple detectors | Conventional double detectors | |
Unquenched | >70% | 65% |
3H in water | >35% | 25% |
3H in water, high quench | 10% | 5% |
Hidex ULLA existing users
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Documents
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Hidex-ULLA-US-Version-1.0
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