Can you afford an electronic failure?

Stop corrosion before it starts and save thousands in downtime and repair costs.

Download Protecting Electronic Assets Brochure

electronics control room
Corrosivity test kit

We specialize in protecting critical electronics:

  • Protection of mission critical electronics hardware
  • Elimination of hydrogen sulfide and other corrosive emissions
  • These gases can cause whiskers and short-circuiting which can lead to production loss, plant interruptions, and accidents. 
  • In commercial environments like data centers, we super-purify the air to protect valuable servers, thus protecting critical company data and processes.
  • We offer multiple models of air handling units, depending on requirements and needs.  Each unit is customizable.
  • We also offer simplified, ready-to-go units, which are ready to ship upon purchase: PFU-Mobile and PFU-Mini.  Other, larger PFU models are also available for higher airflow systems.
  • Our SAH unit is often used in applications requiring a more customized and robust system.  Other options, including deep bed systems, are available as well.
Corroded switchboard with red circle around it and a red strike through it

What we can help with:

  • Motor Control Center (MCC)
  • Distributed Control System (DCS)
  • Programmable Logic Controller (PLC)
  • Control Room and Panels
  • Rack Room
  • Card Failure
West Rankin Utility Authority wastewater treatment case study brochure

FACILITY TYPE: Progroup PM3 Papermill

LOCATION: Leipzig, Germany

EQUIPMENT/MEDIA USED: Side Access Housing units (SAH), PurePak 12 modules, Sulphasorb™ (no longer available) and PureAir 8 chemisorbant media

PROBLEM: Remove hydrogen sulfide (H2S), sulfur dioxide (SO2), and sulfite (SO3), and other corrosive gases that could cause damage to mission critical hardware and data systems in control rooms.

SOLUTION: PureAir Filtration provided Side Access Housing (SAH) units with PurePak-12 modules filled with Sulphasorb (no longer available) and PureAir 8 media. The systems and media reduced corrosive gas levels and maintained those levels at G1 air quality in the control rooms.

Download Case Study

Looking to monitor levels of corrosive gases in your environment?

PureAir EMC v2 unit

PureAir’s ECMv2:

  • Offers live, accurate results of environment surveillance and detection of corrosion.
  • This prevents expensive interruptions by saving valuable electronics.


  • Constant Environment Surveillance
  • Early Detection
  • Easy to Install
  • Long Service Life
  • Ethernet Connection

ISA Standards

World Wide Standard for Protecting Industrial Electronics: ISA S71.04

  • G1 level needed to protect electronics, but many factors must also be reviewed:
    • Configuration, air recirculation vs pressurization
    • Air tightness of area
    • Contamination brought into room with traffic
    • Air tightness of ducts
  • Room walls in contact with corrosive air
  • Relative humidity < 50%
  • Temperature  target 22°C and stable
G1 G2 G3 GX
Mild (Acceptable) Moderate Harsh Severe
Corrosion is not a factor Corrosion is measurable High probability that corrosion attacks will occur Electronic/electrical equipment is not expected to survive
Copper Reactivity Level 0-299 Angstroms 300-999 Angstroms 1000-1999 Angstroms ≥ 2000 Angstroms
Silver Reactivity Level 0-199 Angstroms 200-999 Angstroms 1000-1999 Angstroms ≥ 2000 Angstroms
Contaminants Concentration
H2S Hydrogen Sulfide < 3 ppb < 10 ppb < 50 ppb ≥ 50 ppb
SO2 Sulfur Dioxide < 10 ppb < 100 ppb < 300 ppb ≥ 300 ppb
CL2 Chlorine < 1 ppb < 2 ppb < 10 ppb ≥ 10 ppb
NOx Nitrogen Oxides < 50 ppb < 125 ppb < 1250 ppb ≥ 1250 ppb
NH3 Amonia < 500 ppb < 10,000 ppb < 25,000 ppb ≥ 25,000 ppb
O3 Ozone < 2 ppb < 25 ppb < 100 ppb ≥ 100 ppb
HF Hydrogen Fluoride < 1 ppb < 2 ppb < 10 ppb > 10 ppb