Trace formaldehyde in ambient air


  • Air Quality
  • Airborne Molecular Contaminants
  • Healthcare & Pharmaceutical Industries
  • Research & Development
Detection and Matrix Range LDL (3σ) Precision (1σ) @ zero
CH2O in Ambient Air0 – 100 ppm10 ppb3.5 ppb
CH2O in N20 – 100 ppm10 ppb3.5 ppb
CH2O in Clean Dry Air (CDA)0 – 100 ppm10 ppb3.5 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
Gas connections 1/4" male VCR inlet & outlet (1/4" Swagelok adapters included)
Inlet pressure 0 – 10 psig
Outlet pressure Vacuum (<10 Torr)
Flow rate ∼2 slpm max.
Sample gases Ambient air and inert gases
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 33 lbs (15 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 per sensor
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  
*Oil-free vacuum source required,
<10 Torr ultimate vacuum,
>1 m3/h pumping speed
Title / Description

T-I Max AIR CH2O Brochure (PDF)

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