HALO 3 CH2O

Trace-level formaldehyde

Applications

  • High-Purity Gases & Systems
  • Hydrogen Fuel Cells
  • Research & Development
  • Syngas & Fuel Gas Production
Detection and Matrix Range LDL (peak-to-peak) Sensitivity (3σ)
CH2O in N20 – 40 ppm4 ppb2.5 ppb
CH2O in H20 – 40 ppm5 ppb3 ppb
Performance
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 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
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 <1 slpm
Sample gases Nitrogen and hydrogen
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)
Weight
Standard sensor 34 lbs (15.4 kg)
Electrical
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 per sensor
User interfaces 5.7” LCD touchscreen, 10/100 Base-T Ethernet, RS-232
  802.11g Wireless (optional), Modbus TCP (optional)
Patents
U.S. Patent #7,277,177  
Title / Description

Advanced Spectroscopic Solutions for Fuel Cell Hydrogen Analysis (PDF)

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HALO 3 CH2O Brochure (PDF)

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