ISO Vacuum Flanges & Components The ISO Vacuum Flanges & Components are manufactured from high quality stainless steel. Kaysen Steel manufacture a comprehensive range of ISO Vaccum Flanges & Components, including ISO Vaccum Flanges, ISO Vaccum Components, ISO Flanges, nipples, elbows, tees, and crosses, clamps, o-ring in all standard vacuum flange systems. KAYSEN ISO Vacuum Flanges & Components form a modular system for piping from ISO63, ISO80, ISO100, ISO160, ISO200, ISO250, ISO320, ISO400, ISO500 in SS304, SS316 material, Aluminium, etc. ISO fittings are ideal for high vacuum environments. Welcome to buy ISO Vaccum Flanges, ISO Vaccum Components, ISO Flanges from us in wholesale price, if you have any questions or requests, pls feel free to contact us! ISO Vacuum Components,ISO Vacuum Flanges,ISO Flanges Kaysen Steel Industry Co., Ltd. , https://www.chinasanitaryvalve.com
ISO Vaccum Flanges & Components Specification:
â–ª Standard: KF, ISO ,CF
â–ª Material: Stainless Steel 304 (1.4301), Stainless Steel 316L(1.4404), Aluminum EN AW-6082/3.2315, Brass, etc
â–ª Sealing Material: rubber/ elastomeric o-ring mounted in a centering ring
â–ª Size Range: ISO63, ISO80, ISO100, ISO160, ISO200, ISO250, ISO320, ISO400, ISO500
▪ Temp.:between ~0° C and 120-180° C
â–ª Pressure: from atmosphere to ~10-8 Torr or mbar.
Quality & Inspection:
â–ª PMI test to verify material grade
â–ª Dimension controlling during fabricating and finished
â–ª Visual and surface 100% examination before shipment
â–ª Packed in carton box firstly, then in wooden case
Catalytic combustion sensors are high-temperature gas detection devices commonly used in flammable gas alarm systems. The core component of the sensor is a platinum wire coil (with a diameter ranging from 0.025 to 0.05 mm) coated with alumina and a binder, forming a spherical structure that is then sintered. The outer surface of this element is further coated with a catalytic layer made of rare metals such as palladium or platinum. This design allows the sensor to detect combustible gases effectively.
When the sensor is activated, a current is applied to the platinum wire, raising its temperature to approximately 300–400°C. If the sensor comes into contact with a flammable gas like methane, the gas reacts on the catalytic layer, undergoing combustion at a lower temperature than normal. This reaction generates heat, which increases the temperature of the platinum wire and causes a change in its resistance. By measuring this resistance change, the concentration of the combustible gas can be determined.
In practical applications, a Wheatstone bridge circuit is often used. The black element in the bridge acts as the detection component, while the white element serves as a reference or compensation component. The white element lacks the catalytic coating and does not react with flammable gases. When a combustible gas is present, the resistance of the black element increases, unbalancing the bridge and generating an output voltage proportional to the gas concentration.
Catalytic combustion is a flameless process that occurs at lower temperatures compared to direct combustion, making it ideal for safety-critical environments. It is widely used in industrial settings, such as fuel cells, furnaces, and exhaust gas treatment systems. Catalysts like platinum or palladium are typically used to enhance the reaction efficiency, allowing organic compounds to be oxidized at around 500°C. This method helps reduce harmful emissions and improve energy efficiency.
Oxygen concentration plays a crucial role in the accuracy of catalytic sensors. These sensors require at least 8–10% oxygen in the environment for proper operation. In environments with no oxygen, such as 100% flammable gas, the sensor may show a reading of 0% LEL, leading to potential errors. Therefore, it's essential to measure both oxygen levels and flammable gas concentrations, especially in confined spaces.
While catalytic sensors respond well to most combustible gases, they are not always suitable for detecting heavier hydrocarbons or long-chain alkanes. These substances may not react as effectively on the sensor’s surface, leading to inaccurate readings. In such cases, alternative technologies like photoionization detectors (PIDs) may be more appropriate.
Shenzhen Suofong Industrial Co., Ltd. specializes in the production of combustible gas alarms and offers reliable, explosion-proof solutions for industrial use. For more information or assistance, please contact their support team directly.
This content was originally sourced from: [Combustible Gas Alarm](http://).
Original URL: [http://news.chinawj.com.cn](http://news.chinawj.com.cn)
Image source: [How does the catalytic combustion combustible gas alarm sensor work?](http://i.bosscdn.com/blog/14/59/28/841699.jpg)