HALO OK

Trace oxygen detection as low as 50 ppt

Applications

  • Gas Quality Control
  • Gaseous CRMs & Calibration Gas Mixtures
  • High-Purity Gases & Systems
  • Hydrogen Fuel Cells
  • Research & Development
Detection and Matrix Range LDL (3σ) Precision (1σ) @ zero
Standard Model
(using pure H2 utility gas)
   
O2 in He0 – 0.5 ppm50 ppt17 ppt
O2 in Ar0 – 1 ppm90 ppt30 ppt
O2 in H20 – 2 ppm150 ppt50 ppt
O2 in N20 – 2.5 ppm200 ppt70 ppt
CO2 Model
(using pure H2 utility gas)
   
O2 in He0 – 0.5 ppm50 ppt17 ppt
O2 in Ar0 – 1 ppm90 ppt30 ppt
O2 in H20 – 2 ppm150 ppt50 ppt
O2 in N20 – 2.5 ppm200 ppt70 ppt
O2 in CO2§0 – 5 ppm5000 ppt300 ppt
Enhanced Safety Model
(using 3% H2/97% N2
mixture utility gas)
   
O2 in He0 – 0.5 ppm400 ppt17 ppt
O2 in Ar0 – 1 ppm400 ppt30 ppt
O2 in H20 – 2 ppm400 ppt50 ppt
O2 in N20 – 2.5 ppm400 ppt70 ppt
LDL is dependent upon the
quality of the sample gas
and the integrity of
the sampling system.
   
LDL is limited by minimum
achievable O2 concentration,
not by 3σ baseline noise.
   
Performance
Operating range See Detection Capability table
Detection limit (LDL, 3σ/24h) 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)
Weight
Standard sensor 45 lbs (20.4 kg)
Electrical and Interfaces
Platform Max series analyzer
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
  USB, RS-232, RS-485, Modbus TCP (optional)
Data storage Internal or external flash drive
Certification CE Mark
Patents
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.
 
Title / Description

HALO OK Brochure (PDF)

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Purity Analysis of Fuel-Cell Hydrogen

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Advanced Spectroscopic Solutions for Fuel Cell Hydrogen Analysis (PDF)

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Moisture Measurement Best Practices Review

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Speed+ Brochure (PDF)

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