NS Analyzer

TE Instruments has developed the XPLORER-NS, a Total Nitrogen and Total Sulfur combustion analyzer, offering fast, accurate and precise analysis of solids, liquids, gases and LPG’s. This brand new model is designed to offer standardized and customized solutions to match both current and future analytical needs, ranging from low ppb’s to high ppm’s.



NS Analyzer

  • Compact design, smallest footprint in today’s market
  • Short start-up time (less than 15 minutes)
  • Fast and precise measurement of solids, liquids, gases and LPG’s
  • Easy to use and intuitive user interface, operation software
  • Simultaneous analysis of Nitrogen and Sulfur
  • Ultra-low detection limit, high stability and reliability due to the temperature controlled detectors and feedback loop
  • Complies with international standards like: ASTM, ISO, EN and IP
  • Easy upgrades with autosamplers for solids, liquids, gases and LPG’s
  • Fully automated creation of calibration lines from a single stock solution with the optional ARCHIE
  • Fast generation of sample list and application methods with TE Instruments software (TEIS)
  • Low maintenance, optimal combustion and conditioning of gases results in near to zero downtime
  • Fast and easy switching between modules, resulting in high productivity

Working principle

Samples are introduced, using the appropriate introduction module, into a furnace, where the oxidation takes place. After a complete combustion, nitric oxide (NO) and Sulfur dioxide (SO2) are formed and led into the serial connected reaction chambers, in the meantime water and particles have been removed.

COMBUSTION: R-SN + O2 → NO + SO2 + H2O + CO2

Sulfur detection:  Sulfur is measured by pulsed UV-fluorescence. Sulfur dioxide (SO2) is formed during the oxidation and is transferred to the reaction chamber. Here it is excited by a pulsed UV source and as the excited state is unstable, the excited SO2 instantly decays to its ground state energy level. During this process, UV light is emitted. As this light has a different wavelength than the original UV source, the photomultiplier tube is able to detect this emission. The amount of light emitted reflects the total amount of SO2 present in the gas, which in turn corresponds to the total amount of sulfur in the sample.

 DETECTION: SO2 + hv1 → SO2*       SO2* → SO2 + hv2

Nitrogen detection:  Electronically generated ozone is added which reacts with the nitric oxide to nitrogen dioxide (NO2*) in an excited state (formed in the reaction chamber). The excited NO2 emits light as it reverts to a lower energy state. The emitted light is detected by a Photomultiplier Tube (PMT). The amount of detected emitted light, corresponds with the amount of NO. This in turn represents the amount of Total Nitrogen present in the sample.

DETECTION: NO + O3 → NO2*         NO2* → NO2 + hv1


    S:ASTM D5453、ASTM D6667、ASTM D7183、ISO 20846、GB/T 11141、SH/T 0689、GB/T 11060.8
    N:ASTM D4629、ASTM D5762、ASTM D6069、ASTM D7184、SH/T 0657、EN 12260


  • Dimensions (W x H x D):36 x 27.2 x 69 cm (14.2 x 10.7 x 27.2)
  • Weight:32 kg (70.5 lbs) without furnacetube and introduction
  • Voltage:100-240 V, 50-60 Hz
  • Power requirement (max):1150 W
  • Gas connectors:?" Swagelok
  • Gases:Oxygen 99.6 % (2.6), Argon 99.998 % (4.8)
  • Input gas pressure:3-10 bar
  • Internal gas pressure:1.8 bar, adjustable
  • Furnace voltage:Dual zone, low voltage
  • Furnace temp. (max):1150 °C (2102 °F)
  • Furnace cooling:Pulling fan, auto control
  • Sample introduction:Solid by boat, Liquid direct injection, Gases and LPG’s by GLS
  • Semi-automatic boat/syringe driver:Software controlled, adjustable method file
  • Slider/shutter driver:Software controlled, adjustable
  • Detector Nitrogen:Chemiluminescence
  • Detector Sulfur:Xenon Pulsed UV-fluorescence AFC technology
  • Detector accuracy:Better than 2% CV
  • Detector conditioning:Temperature controlled, adjustable
  • Vacuum pump:Internal 24 Volt DC
  • Software:dot.NET-based, TEIS software
  • Ambient temperature:5-35 °C (41-95 °F) non condensing


Chemicals: Acetic Acid, Polypropylene & -ethylene, Polycarbonate, Aromatics, Resins, Olefins and parafines; Refinery products: Crude oil, Kerosene, Fuel oil, Gasoline, Diesel fuel, Catalyst, Naphta, Lubricants; LPG and gases