Trace oxygen detection as low as 100 ppt


  • Gas Quality Control
  • Gaseous CRMs & Calibration Gas Mixtures
  • High-Purity Gases & Systems
  • Hydrogen Fuel Cells
  • Research & Development
Detection and Matrix Range LDL Sensitivity
O2 in He0 – 0.5 ppm100 ppt50 ppt
O2 in Ar0 – 1 ppm110 ppt90 ppt
O2 in H20 – 2 ppm200 ppt150 ppt
O2 in N20 – 2.5 ppm250 ppt200 ppt
O2 in CO2§0 – 5 ppm1000 ppt400 ppt
§Special configuration required,
must be specified at time of order.
Operating range See Detection Capability table
Detection limit (LDL, 24 h peak-to-peak) See Detection Capability table
Sensitivity (3σ) See Detection Capability table
Precision (1σ, greater of) ± 0.75% or 1/3 of Sensitivity
Accuracy (greater of) ± 4% or 1/2 of LDL
Speed of response < 3 minutes to 95%
Environmental conditions 10°C to 40°C, 30% to 80% RH (non-condensing)
Storage temperature -10°C to 50°C
Gas Handling System and Conditions
Wetted materials 316L stainless steel, 10 Ra surface finish
Leak tested to 1 x 10-9 mbar l / sec
Gas connections 1/4” male VCR inlet and outlet
Sample inlet pressure 10 − 125 psig (1.7 − 9.6 bara)
Sample flow rate 0.5 – 1.8 slpm (gas dependent)
Sample gases Most inert matrices
Gas temperature Up to 60°C
H2 supply requirements* ~15 sccm, 20 − 125 psig
Dimensions, H x W x D
Standard sensor 8.73" x 19.0" x 23.6" (222 mm x 483 mm x 599 mm)
Standard sensor 45 lbs (20.4 kg)
Alarm indicators 2 user programmable, 1 system fault, Form C relays
Power requirements 100 − 240 VAC, 50/60 Hz
Power consumption 450 Watts max.
Signal output Isolated 4−20 mA
User interfaces 5.7” LCD touchscreen, 10/100 Base-T Ethernet, RS-232
  802.11g Wireless (optional), Modbus TCP (optional)
Certification CE Mark
U.S. Patent #7,277,177 • U.S. Patent # 7,255,836  
*H2 supply (maximum 10 ppm H2O and O2
impurity) is required for sample conditioning
via catalytic conversion.
LDL is dependent upon the quality of the sample
gas and the integrity of the sampling system.
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