Q-S121 H2 Analyzer

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Q-S121 H2 Gas Analyzer is a flow through analyzer for measurements of H2 gas in 0-100 ppm range. The H2 analyzer can be customized for higher range measurements. Contact Qubit Systems for details. The Q-S121 has a Tin-dioxide (SnO2) semiconductor sensing element. Its output is sensitive to background gas (N2 vs Ar) and oxygen concentration.

Factory calibration at 21% O2 for both N2 and Ar background gases is provided with the analyzer. When purchased with the C610 LabQuest Mini data interface and C901 Logger Pro software (optional) experimental setup file is provided for correction of voltage output to H2 concentration in ppm.

Q-S121 can be used to measure Nitrogenase activity as H2 evolution in uptake hydogrenase (HUP) minus symbioses of legumes. The Q-S121 H2 Gas Analyzer may also be used to monitor the hydrogen consumption of organisms that have the HUP enzyme. This H2 Analyzer is a vital part of the Q-Box NF1LP Nitrogen Fixation Package.

  • For measurements of low levels of H2 gas (0-100ppm)
  • May be customized for higher levels
  • Sensitive to background gas and O2 concentration
  • Measurements of Nitrogenase Activity and calculations of nitrogen fixation rates in H2 evolving symbioses
  • Monitoring activity of H2 evolving or consuming microorganisms
  • Soil research
  • Detection Principle: metal oxide semi-conductor with heated alumina ceramic tube, flow through
  • Range: 0 to 100 ppm H2 (higher range in customized units)
  • Output: 0 to 5 V analog to digital interface
  • Output sensitive to O2 concentration and background gas, solvents, water vapour
  • Resolution: ±0.01 ppm, 0 to 10 ppm Range; ±0.02ppm, 10 to 40 ppm Range; ±1.05 ppm, 40 to 100 ppm Range
  • Accuracy: ±0.03 ppm, 0 to 10 ppm Range; ±0.05 ppm, 10 to 40 ppm Range; ±1.00 ppm, 40 to 100 ppm Range
  • Response time (90%): 2min (priming with high H2 required)
  • Calibration at 21% O2 in N2 and Ar is provided with the H2 Analyzer
  • Operating Temp: 0-60C
  • warranty: 1 years
  • Dimensions (cm) – (H x W x D: 5.5 to 9.5 x 9.5 x 17)
  • Weight – 1kg
  • Power Supply: 12V DC
  • Catherine A. Osborne, Mark B. Peoples and Peter H. Janssen. Detection of a Reproducible, Single-Member Shift in Soil Bacterial Communities Exposed to Low Levels of Hydrogen. Applied and Environmental Microbiology Vol. 76, Number 5, p1471-1479 (2010).
  • Mark B. Peoples, Paul D. McLennan and John Brockwell. Hydrogen emission from nodulated soybeans [Glycine max (L.) Merr.] and consequences for the productivity of a subsequent maize (Zea mays L.) crop. Plant and Soil Vol 307, Numbers 1-2, p67-82 ( 2008).
  • Z. Dong, L. Wu, B. Kettlewell, C. D. Caldwell and D. B. Layzell. Hydrogen fertilization of soils – is this a benefit of legumes in rotation? Plant, Cell & Environment Vol 26, Issue 11, p1875–1879 (2003).
  • Z. Dong and D.B. Layzell. H2 oxidation, O2 uptake and CO2 fixation in hydrogen treated soils. Plant And Soil Vol 229, Number 1, p1-12 (2001).

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