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Rigaku NEX QC low cost EDXRF elemental analyzer

Since 1951, Rigaku has been at the forefront of analytical and industrial instrumentation technology. Rigaku and its subsidiaries form a global group focused on life sciences and general purpose analytical instrumentation. With hundreds of major innovations to its credit, Rigaku and its subsidiary companies are world leaders in the fields of small molecule and protein crystallography, X-ray spectrometry and diffraction, X-ray optics, as well as semiconductor metrology. Rigaku employs over 1,100 people globally.

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NEX OL Process Elemental Analyzer

On-line, real-time analysis by Energy Dispersive X-ray Fluorescence (EDXRF)

Features and benefits
  • Real-time process control by elemental analysis
  • Measure elements 13Al to 92
  • From ppm levels to weight percent (wt%)
  • Robust NEX QC+ optics with SDD detector
  • Industrial touch screen user interface
  • Easy empirical calibration and routine operation
  • Toolless routine maintenance
  • Multiple remote analysis heads (non-classified)
  • No dangerous radioisotopes

Featuring advanced 3rd generation energy dispersive X-ray fluorescence (EDXRF) technology, the Rigaku NEX OL represents the next evolution of process elemental analysis for liquid stream and fixed position web or coil applications. Designed to span from heavy industrial through to food grade process gauging solutions, the NEX OL is configurable for use in both classified and non-classified areas.

Analyze from aluminum (13Al) to uranium (92U)

To deliver superior analytical performance and reliability, the EDXRF measuring head assembly was derived from the established Rigaku NEX QC+ high resolution benchtop instrument. With this proven technology, the Rigaku NEX OL delivers rapid, non-destructive, multi-element analyses — from parts-per-million (ppm) levels to high weight percent (wt%) concentrations — for elements from aluminum (Al) through uranium (U). Equipped with a 50 kV X-ray tube and SDD detector — together with a standardized, optimized suite of tube filters — the Rigaku NEX OL is engineered to solve a broad range of process control applications.

Coating thickness and composition

In addition to analyzing liquid streams, the Rigaku NEX OL is designed to service web and coil applications, with the ability to perform multi-element composition and/or coating thickness. Typically a head is mounted in a fixed position over a roller so that the head to surface distance is constant.



XRF Method

No Radioisotopes


A Broad Range of Applications

XRT Applications

Equipped with a 50 kV X-ray tube and SDD detector — together with a standardized, optimized suite of tube filters — the Rigaku NEX OL is engineered to solve a broad range of process control applications. Some of the most common applications include:

  • Polyethylene / PET manufacturing: TPA and PTA catalysts
  • Metal finishing: plating, pickling and pre-treatment baths
  • Mining: solvent extractions
  • Chemicals: blending additives and resins
  • Paper and plastics: release / barrier coatings, fire retardants, UV stabilizers
  • Woven and nonwoven fabrics: fire retardants, UV stabilizers
  • Metals: conversion coatings, other surface coatings
  • Petroleum: lubricating oil additives and blending
  • Pulp and paper: process water
  • Industrial: waste water

Rigaku NEX OL for Liquid Streams or Web Applications

How It Works

With X-ray fluorescence (XRF), an electron can be ejected from an inner atomic orbital by the absorption of light (photon) from an X-ray tube. An electron from a higher energy orbital transfers to fill the vacant orbital. During this transition, a photon may be emitted. Because the energy difference between two specific orbital shells is always the same for a specific element, the emitted photon will always have a unique characteristic energy (keV). At any characteristic energy, the number of photons per unit time (counts per second) detected is correlated to the concentration of that element in a process stream.

Rigaku Delivers Superior Performance Without Dangerous Radioisotopes

Globally, the petroleum industry continues to employ tens of thousands of radioisotopes in activities that range from exploration and production to distribution. The presence of these radioisotope sources, in such vast numbers, represents a statistically significant opportunity for theft and subsequent misuse. Governments worldwide now regard radiological terrorism, through the use of radiological dispersive devices (RDD) - often called “dirty bombs,” to be far more likely than use of a nuclear explosive device. In the context of the recent Deepwater Horizon Incident in the Gulf of Mexico, it is incumbent on the petroleum industry to evaluate liability exposure relative to its radioisotope inventory. Whether protecting the customer base or corporate shareholders, technology now exists to largely mitigate the risk associated with previous generation isotope-based technologies. Click through to read this article: Dirty Bombs and Liability Exposure in the Petroleum Industry. Ray Fleming and Robert Tisdale. Petro Ind. News: 11(3), 2010, p.34-35.

Petro Industry News - Dirty Bomb Article

NEX OL Specifications

Elemental coverage:
  • Aluminum (Al) to uranium (U)
  • Multi-element analysis
Analytical head:
  • NEX QC+ optical kernel
  • Toolless removal
  • Quick disconnects for all connections
  • Toolless X-ray window
  • 50 kV X-ray tube
  • 4 W max power
  • 6 tube filter positions with shutter
  • Silicon drift detector (SDD)
  • Thermoelectrically cooled
Liquid flow cell:
  • Application specific body material
  • Toolless flow cell window change
  • Leak sensor
  • MODBUS over Ethernet
  • Four 4 – 20 mA discrete outputs
  • Eight 4 – 20 mA discrete outputs (optional)
  • General warning: dry contact
  • General alarm: dry contact
  • Leak in cabinet: dry contact
  • Process alarm: dry contact
Available configurations:
  • Self-contained one box analyzer
    • liquid flow cell
  • Control unit box plus remote analyzer head
  • Multiple remote heads (non-classified only)
  • 4 – 20 mA calibration select 
Area classifications:
  • Unclassified
    • Remote head / NEMA 4 box configuration
  • Class 1 Div 1 Groups B, C, D
  • Class 1 Div 2 Groups B, C, D
  • ATEX zone 2
Ambient conditions:
  • 0 – 35°C (32 – 95°F)
    • Consult Rigaku for other temperature ranges 
  • Air supply (NEMA 4 classified configuration):
  • Purge
    • 4.0 – 8.0 bar (60 – 115 psig) air pressure
    • 115 – 225 l/m (4 – 8 scfm) rapid exchange
    • Leakage compensation (application specific)
  • Optional vortex cooler
    • 710 – 990 l/m (25 – 35 scfm) dry oil free air
    • 6.2 – 8.0 bar (90 – 115 psig) air pressure
Power requirements:
  • 110/240 V, 2.5/1.5 A (47 – 63 Hz)
    • Dedicated supply

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