Gas Monitoring for Sterilization / Disinfection Processes

With the COVID-19 pandemic there has been an increase in disinfecting and sterilizing processes worldwide. Most of these processes include conditioning an area or an item with a desired concentration to perform the sterilization phase. Hydrogen peroxide, chlorine dioxide, and ozone are mainly used in this application.

Hydrogen Peroxide

(H2O2) is a colorless liquid at room temperature with a bitter taste. Small amounts of gaseous hydrogen peroxide occur naturally in the air. Hydrogen peroxide is unstable, decomposing readily to oxygen and water with release of heat. Although nonflammable, it is a powerful oxidizing agent that can cause spontaneous combustion when it comes in contact with organic material. Hydrogen peroxide is found in many households at low concentrations (3-9%) for medicinal applications and as a bleach for hair and clothing. In other industries, hydrogen peroxide is used in higher concentrations as a bleach for textiles and paper, as a rocket fuel component, and for producing foam rubber and organic chemicals.
Chlorine Dioxide

(ClO2) is a yellow-green gas with an odor similar to chlorine with excellent distribution, penetration and sterilization properties due to its gaseous nature. Although chlorine dioxide has chlorine in its name, its properties are very different, much like carbon dioxide is different than elemental carbon. Chlorine dioxide has been recognized as a disinfectant since the early 1900s and has been approved by the US Environmental Protection Agency (EPA) and the US Food and Drug Administration (FDA) for many applications. It has been demonstrated as an effective broad spectrum, anti-inflammatory, antibacterial, fungicidal, and virucidal agent, as well as a deodorizer.Exposure Symptoms Irritation of eyes, nose & throat; cough, wheezing, chronic bronchitisRespirator Recommendations Begin at 1 ppm

(O3) is gaseous molecule primarily found in Earth's upper atmosphere. It is a pale blue gas with a pungent smell similar to chlorine. Ozone is a powerful oxidant. With its third oxygen molecule, it is able to destroy germs, viruses, and microbes that may cause surface or air contamination.Exposure Symptoms Cough, throat irritation, chest pains from inflammation, wheezing, shortness of breathRespirator Recommendations Begin at 0.1 ppm

Exposure Limits

8 hours
IDLH8hr TWA15 min STEL8hr TWA15 min STEL
1 ppm
75 ppm0.1 ppm

0.3 ppm0.1 ppm

0.3 ppm

RKI Solutions

RKI Solution

RKI offers portable and fixed system solutions for hydrogen peroxide, chlorine dioxide, and ozone depending on the need.

GD-70D Series front viewEAGLE
The EAGLE is a 6-channel sample-drawing portable monitor that can be configured to detect hydrogen peroxide, chlorine dioxide, ozone and other gases if needed.

0 – 3.00 ppm and 0.02 resolution for H2O2
(lowest initial reading is 0.18 ppm)

0 – 1.00 ppm and 0.01 resolution for ClO2
(lowest initial reading is 0.06 ppm)

0 – 1.00 ppm and 0.01 resolution for O3
( lowest initial reading is 0.06 ppm)

The SC-8000 is a single gas portable monitor with an internal sampling pump and a range of:

0 – 3.00 ppm and 0.02 resolution for H2O2
( lowest initial reading is 0.09 ppm)

0 – 1.00 ppm and 0.01 resolution for O3
(lowest initial reading is 0.03 ppm)


GD-70D Series front viewGD-70D
The GD-70D smart transmitter has the ability to continuously monitor as a fixed system. It has alarm indications and alarm relays that can be used for ventilation or other automated responses.
0 – 3.00 ppm and 0.02 resolution for H2O2
0 – 0.6 ppm and 0.01 resolution for O




Ordering Information

Part# Description Group  Subgroup 
72-5124RK  EAGLE for Hydrogen Peroxide (H2O2),
 0 – 3.00 ppm, (no probe)
Portables Eagle
72-5118RK   EAGLE for Chlorine Dioxide (ClO2)
0 – 1.00 ppm (also detects chlorine)
Portables  Eagle  
72-5109RK   EAGLE for Ozone (O3) (no probe),
0 – 1.00 ppm 
Portables Eagle 
73-0053-H2O2  SC-8000 toxic gas detector, Hydrogen Peroxide (H2O2),
 0 – 3.00 ppm, Li-ion type
Portables  SC-8000
73-0053-O3   SC-8000 toxic gas detector, Ozone (O3),
 0 – 1.0 ppm, Li-ion type 
Portables SC-8000
GD-70D-H2O2   Smart transmitter, GD-70D for Hydrogen Peroxide
(H2O2), 0 – 3.00 ppm
Fixed Head  GD-70D
GD-70D-O3   Smart transmitter, GD-70D for Ozone (O3),
 0 – 1.00 ppm
Fixed Head  GD-70D 

References: The National Institute for Occupational Safety and Health (NIOSH); Agency for Toxic Substances and Disease Registry; CDC

SC-8000 Web Page

EAGLE 1 Web Page

GD-70D Web Page

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