Argon arc welding is a welding technology based on general arc welding principle that uses argon to protect metal welding material and melts welding material into liquid on the base material through high current so as to form a weld pool, to let weld metal and welding material achieve metallurgical bonding. In a nutshell, it is…
Nowadays, numerous building-related diseases are caused by poor indoor air quality. For example, the chemicals of indoor decoration materials will slowly dissipate into indoor environment as time goes on, which will induce a certain degree of health and safety hazards to people who stay indoor for a long time. For air…
Vacuum valve is used in a vacuum system to change the direction of airflow, adjust air mass flow and cut off or connect pipes in the vacuum system. Vacuum valve close parts are sealed by rubber or metal seal ring. Vacuum electromagnetic valve is controlled by AC or DC power supply to turn on…
Since the reform and opening-up, fruits and vegetables industry of China have developed rapidly. Vegetables and fruits have become the second and third largest industries of China’s planting industry after grain. Since 1993, the vegetable yield of China has ranked the world and become the biggest fruit country in the world….
It is a question we are asked frequently:How to prolong the life of zirconia oxygen sensor? There are many things we can do, but also, more importantly, there are many chemicals and gases we can try to avoid to prevent contaminating your oxygen sensor and having to replace it sooner rather…
What is the problem that needs to be solved? Building Management Systems (BMS), Demand-Controlled Ventilation (DCV) systems and Indoor Air Quality (IAQ) equipment often require installation of wirelessly-connected, battery-powered CO2 sensor devices in environments where mains power is not easily accessible or where its provision is not economically viable; such…
With no amplification function, conventional stethoscopes sound weak and make the ears uncomfortable. They cannot block ambient noise or adjust their frequency. Therefore, Isweek here puts forward a new type of high sensitivity contact microphone (piezoelectric sensor) used as a pickup part in electronic stethoscopes. It collects human life info with…
In 2015, vehicles driven by H2 fuel cells stepped into the first state of commercialization. Toyota Mirai has been in the market of America and Europe, and is planning to enter China later. In China, performance of fuel cell vehicles can basically meet the requirements of operation, so they have…
Natural gas is a kind of fossil fuel in gas state whose major component is alkane. Different from other fuel, it generates no waste water or residue in combustion. Comparing with coal gas, it’s obviously a sort of clean energy source, since that it produces few harmful materials but only…
In this era of IoT, people pursuing comfortable lives are paying more attention to health care and environmental quality. Smart city and smart homes appear consequently. Among all kinds of devices, environment monitoring devices used in smart homes are most popular, thus PM2.5 sensors and temperature and humidity sensors are…
The working principle of PM2.5 sensors is based on light scattering. When being exposed to light, particles and molecules will absorb part of the energy, and scatter part of the light. When a light beam goes parallel into the particle field to be measured, the light is affected by scattering and…
Integrated temp&humidity sensors of small size and high accuracy are widely applied in cellphones, communication, HVAC, medical care, environment monitoring, home appliance and control panels. Here we ISWeek would like to make a comparison between the two best sellers in the market – HTU21D and SHT21- from aspects of their cost…
