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Categories: Gas Monitors, Process, Specialised Products,

Leading choice for ultra-high purity gas users

Detect gas quality upsets before they damage your process. Using Tiger Optics’ HALO H2 hydrogen analyzer, you can verify H2impurity levels with part-per-billion accuracy, drift-free stability and instantaneous response. The HALO H2 is easy and fast to install and effortless to maintain, with built-in zero verification. Its robust design—free of moving parts—results in an analyzer that has a high Mean Time Between Failure (MTBF) rate and a very low Cost of Ownership (CoO).

With its patented catalytic conversion technique, utilizing a minute amount of oxygen to cleanly and safely convert hydrogen to moisture, the HALO H2 offers a fully laser-based solution for continuous quality control of your process.

The HALO H2 offers:

  • Low parts-per-billion (ppb) detection capability
  • Extremely fast speed of response
  • Wide dynamic range
  • Absolute measurement (freedom from need for calibration gases)
  • Low maintenance and cost of ownership
  • Compact, portable package, ideal for both fixed and mobile cart installation
  • Direct measurement in many matrices, including oxygen.


  • Gaseous CRMs & Calibration Gas Mixtures
  • High-Purity Gases & Systems
  • Research & Development.


Laboratory & Scientific

Stack, Process & CEMS

Detection Capability

Detection and Matrix Range LDL (3σ) Precision (1σ) @ zero
H2 in N2 0 – 500 ppm 8 ppb 3 ppb
H2 in Ar 0 – 200 ppm 6 ppb 2.0 ppb
H2 in He 0 – 125 ppm 4 ppb 1.5 ppb
H2 in O2 0 – 250 ppm 50 ppb
(dry-down limited)
1.5 ppb
H2 in Clean Dry Air (CDA) 0 – 450 ppm 20 ppb
(dry-down limited)
2.5 ppb


Operating range See Detection Capability table
Detection limit (LDL, 3σ/24h) See Detection Capability table
Precision (1σ, greater of) ± 0.75% or 1/3 of LDL
Accuracy (greater of) ± 4% or 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 slpm (± 20%)
Sample gases Most inert matrices
Gas temperature Up to 60°C
Utility gas supply* Mixture of 1% O2, 99% N2 with ~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 90 − 240 VAC, 50/60 Hz
Power consumption 200 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)
U.S. Patent #7,277,177 • U.S. Patent # 7,255,836
*O2/N2 supply (maximum 10 ppm H2O and H2
impurity) is required for sample conditioning
via catalytic conversion.
Bronwyn Straccione

Bronwyn Straccione

Category Manager - CEMS and Gasmet

Hi there, I'm Bronwyn. I've been with TES for 15 years and I'm the Category Manager for our Gasmet and CEMS equipment sales. My usual work days are Monday - Wednesday. If there's something I can help you with, please give me a call on 0404 161 353 or send me a message and myself or your local sales support will be in touch shortly!

Get in touch for more information...