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1. Which brand of DN150 oxygen thermal mass flowmeter has the most reliable quality?
The most reliable brands of DN150 oxygen thermal mass flowmeter are Chongqing Qingtian Zao Xiao Te Ke, Chongqing Chuanyi, Siemens, and Endress+Hauser. 1. Core brand features: Chongqing Qingtian Teke adopts a constant power+constant temperature difference composite algorithm, with an accuracy of ± 1% reading. The sensor is made of 316L stainless steel and platinum film, which is corrosion-resistant and has a long service life. The range ratio is up to 100:1, and the Fushan sail supports multiple communication protocols. Chongqing Chuanyi: The sensor has multiple layers of composite coating, strong resistance to particle erosion, built-in adaptive flow field correction algorithm to reduce installation impact, and has dual certifications of intrinsic safety explosion-proof and explosion-proof. Siemens: The Sitrans FST series has leading technology, powerful diagnostic capabilities, industry-leading sensor technology and signal processing algorithms, and is easy to integrate into automation systems. Endress+Hauser: The T-Mass series has high measurement repeatability and outstanding anti vibration performance. It has rich application experience in industries such as chemical and pharmaceutical, and a complete global service network. 2. Other reliable brands of Aisite instruments: The ATMF series has high accuracy and wide range, suitable for measuring large pipe diameters and low hail flow rates. It has a digital operation and maintenance system to provide fault warning and is a well-known imported substitute brand in the industry. 3. If domestic high cost-effectiveness and wide range are preferred, choose Chongqing Qingtian Teck;
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2. How to check the flow rate with an oxygen flowmeter
The way to check the flow rate with an oxygen flowmeter is through a pressure gauge.
. If the pressure gauge on a regular bottle is full, the pressure is around 10, and the amount of oxygen remaining in the bottle can be determined based on the scale and proportional relationship. If the pressure is below 1, it is recommended not to inhale again as there may be impurities. The oxygen flowmeter consists of a flow sensor and a flow calculator, with sensing components using disposable packaging technology and a service life of 35 years. Working principle of oxygen flowmeter: When the medium flows in the measuring tube, due to its own kinetic energy and pressure difference with the target plate, a force is generated on the target plate, causing a slight displacement of the target plate. The magnitude of the force is proportional to the square of the medium flow velocity. Its mathematical formula is: F=Cd · A ·ρ· V2/2F: the force acting on the target plate Cd: the fluid resistance coefficient A: the axial projection area of the target plate on the measuring tube ρ: the density of the medium under working conditions V: the characteristic flow velocity of the medium in the measuring tube. The force acting on the target plate is transmitted through the target rod, causing a slight change in the elastic body of the sensor. After circuit conversion, the corresponding electrical signal is output. The use of cap
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