Hidex ULLA

Hidex ULLA

Hidex has served the liquid scintillation counting community for three decades. In recent years, the global market has been missing a true ultra low level LSC that would meet the most demanding needs. Applications in hydrogeology when mapping the 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 ULLA combines existing technology, latest innovation and modern usability.

Key Features

Ultra Low Background and Triple Coincidence Detection

The Hidex ULLA achieves low background using a heavy lead shield and optimal active guard around a triple-PMT detector. This setup enables high counting efficiency, luminescence-free counting, and absolute activity counting using the TDCR method.

High Counting Efficiency

With three PMTs at 120° alignment, the Hidex ULLA offers superior detection compared to conventional double coincidence detectors. For example, counting efficiency for 3H in 20 ml vials is:

Hidex ULLA:

Unquenched: >70%

3H in water: >35%

High quench: 10%

Quench Correction with TDCR

TDCR is a universal method for measuring counting efficiency without external standards, effective for various samples and isotopes. An external Eu-152 standard is available for traditional quench correction.

Luminescence-Free Counting

Operating solely in triple coincidence mode eliminates chemiluminescence interference, allowing immediate counting of samples with long luminescence decay, such as 14C in NaOH.

Alpha/Beta Separation

An optional alpha/beta separation feature uses unique electronics and 2D/3D spectrum analysis for reliable detection, even for unknown mixtures.

Ideal Applications

H-3 in water
C-14 dating
Biogenic carbon detection in fuels
Alpha and beta isotopes in soil, food, and water

Hidex VALO Software

VALO is user-friendly software designed for Hidex LSC, offering extensive data reduction, quench curve analysis, and easy multi-user access. Users can add methods and samples while counting, with a 21 CFR Part 11 compliant version available.

Technical Specifications

Sample capacity, 20/7/5mL

40/96

Counting efficiency H-3/C-14 (%)

70/97 (unquenched)

> 35 for ³H in 8+12 ml H₂O

Background H-3 in water 8+12 (CPM)

< 1 CPM in normal surface lab condition

FOM H-3 in water 8+12 ml

> 600 without optimization
> 900 with optimization and Digital Pb

Dimensions, W/H/D (cm)

69/130/95

Weight (kg)

~800

Options

525-003 alpha/beta separation

462-019 External Eu-152 std source

425-2003 Cooling

Product Brochure

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sales@nokitechnologies.com