Ultimate part-per-trillion moisture detection


  • High-Purity Gases & Systems
  • Research & Development
Detection and Matrix Range LDL* Precision (1σ) @ zero
H2O in N20 – 5 ppm100 ppt40 ppt
H2O in He0 – 1 ppm100 ppt10 ppt
H2O in Ar0 – 2 ppm100 ppt20 ppt
H2O in H20 – 4 ppm100 ppt30 ppt
H2O in O20 – 2.5 ppm100 ppt20 ppt
H2O in Clean Dry Air (CDA)0 – 4 ppm100 ppt30 ppt
*The Detection limit (LDL) is defined as 3σ over 24h
or the H2O drydown limit, whichever is higher.
Operating range See Detection Capability table
Detection Limit (LDL)* See Detection Capability table
Precision (1σ, greater of) ± 0.75% or 1/3 of LDL
Accuracy (greater of) ± 4% or LDL
Speed of response < 2 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
Gas connections 1/4” male VCR inlet and outlet
Leak tested to 1 x 10-9 mbar l / sec
Inlet pressure 10 − 125 psig (1.7 − 9.6 bara)
Flow rate ∼2 slpm in N2 (gas dependent)
Sample gases See Detection Capability table
Gas temperature Up to 60°C
Dimensions, H x W x D
Standard sensor 8.73" x 8.57" x 23.6" (222 mm x 218 mm x 599 mm)
Sensor rack (fits up to two sensors) 8.73" x 19.0" x 23.6" (222 mm x 483 mm x 599 mm)
Standard sensor 28 lbs (12.7 kg)
Electrical and Interfaces
Platform Max series analyzer
Alarm indicators 2 user programmable, 1 system fault, Form C relays
Power requirements 90 − 240 VAC, 50/60 Hz
Power consumption 40 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
U.S. Patent #7,277,177  
*The Detection limit (LDL) is defined as 3σ over 24h
or the H2O drydown limit, whichever is higher
Title / Description

HALO KA Max Brochure (PDF)

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Parts-Per-Trillion Moisture Detection in Electronic-Grade Bulk Gases

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