There are two different disinfection processes for sterilization using hydrogen peroxide.
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Summary: Each requires different measuring equipment to ensure proper operation. The first sterilization process is plasma sterilization using a capacitive vacuum pressure gauge to measure the process pressure in the sterilization cycle. Medical devices are inserted into the sterilizer chamber. Medical devices include scalpels and catheters, dental equipment, and other equipment with grooves and channels.
Sterilization of medical equipment is one of the most important processes in healthcare. It eliminates all living microorganisms, including bacteria, spores, viruses, and fungi, from medical and dental equipment, ensuring their safety and reusability. While various sterilization methods exist, hydrogen peroxide is widely used in healthcare centers, hospitals, and dental clinics due to its effectiveness, safety, and cost-effectiveness. Below, we will explore two hydrogen peroxide sterilization techniques and how to select the right pressure sensor for sterilization equipment based on sensor technical parameters and operational characteristics.
Two different sterilization processes utilize hydrogen peroxide. Each requires different measurement equipment to ensure proper operation. The first process, plasma sterilization, employs a capacitive vacuum pressure gauge to measure process pressure during the sterilization cycle. Medical devices, including scalpels and catheters, dental equipment, and other devices with grooves and channels, are placed inside the sterilizer chamber. The chamber is then sealed and evacuated to create a vacuum. Hydrogen peroxide sterilizing agent from a pre-packaged container is injected into the chamber. After vaporization, the agent interacts with the surface of the medical/dental equipment. This causes a pressure increase; the pressure then decreases again and creates plasma. The free radicals of hydrogen peroxide interact with and kill microorganisms. Afterward, the hydrogen peroxide decomposes, leaving only water vapor and oxygen. The medical equipment can be used immediately after sterilization or stored.
To ensure effective sterilization, a specific base pressure is needed within the sterilizer chamber when plasma is generated. A capacitive vacuum pressure gauge is therefore installed on the sterilizer to monitor and/or control chamber pressure and maintain appropriate pressure at each stage of the sterilization process. When selecting a vacuum pressure gauge for your application, partner with a supplier offering a range of products: with various full-scale pressure ranges from 10 to 1000 Torr, reading accuracy of ±0.5% (preferably ±0.25% if available), and negligible temperature coefficient within a temperature compensation range of 0°C to 50°C.
The second sterilization process uses vaporized hydrogen peroxide. Before being converted to steam within the sterilization chamber, the hydrogen peroxide is stored as a liquid in a reservoir. During use, the liquid sterilizing agent is sprayed from the reservoir into the system, killing microorganisms on the equipment. This application uses a gauge pressure sensor to measure the pressure exerted by the liquid sterilizing agent in the reservoir on the sensor, indicating the hydrogen peroxide level.
The sterilization process works as follows: the pressure sensor is installed at the bottom of the sterilizing agent reservoir. The weight of the sterilizing agent exerts pressure on the sensor. The cable on the back of the sensor contains a vent tube, allowing the sensor to measure pressure relative to local atmospheric pressure (gauge pressure measurement). As the sterilizing agent is consumed, the weight (pressure) decreases, and the output signal sent by the sensor to the redundant monitoring system decreases accordingly. The sensor can then alert sterilization technicians to low reservoir levels. When the sensor register value is 0 PSIG, it indicates that the reservoir is empty.
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