Posted on

How Ultrasonic Flowmeters Work

animation of flow moving through ultrasonic flowmeter

animation of flow moving through ultrasonic flowmeterUltrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe. At no flow conditions, the frequencies of an ultrasonic wave transmitted into a pipe and its reflections from the fluid are the same. Under flowing conditions, the frequency of the reflected wave is different due to the Doppler effect. When the fluid moves faster, the frequency shift increases linearly. The transmitter processes signals from the transmitted wave and its reflections to determine the flow rate. Continue reading “How Ultrasonic Flowmeters Work”

Posted on

Semiconductor Tool Parameter Monitoring Solutions

A semiconductor transistor is a part with specific electronic properties that allow it to serve as a component in microchips and modern electronics like phones, laptops, and more. As these components are small and require precise manufacturing methods, there are facilities dedicated to their manufacture.

These facilities consist of several levels including air handlers and scrubbers for exhaust, HEPA room, fab cleanroom, and subfab areas. The control of pressure, flow, and temperature within the facility is essential.

Semiconductor process tools are used for the production of microchips and other microelectronic components. These process tools are highly engineered and have a multitude of applications such as pneumatics, electrical, electronics, fume exhaust, chemical & gas distribution, radio frequency (RF) generation, and ultra-high vacuum. Dwyer products help to ensure that process tools are being monitored and controlled to the system owner’s designated parameters.  Continue reading “Semiconductor Tool Parameter Monitoring Solutions”

Posted on

Monitoring Solutions for Semiconductor HEPA/ULPA Rooms

Semiconductor Fab with HEPA/ULPA Room Highlighted

A semiconductor transistor is a part with specific electronic properties that allow it to serve as a component in microchips and modern electronics like phones, laptops, and more. As these components are small and require precise manufacturing methods, there are facilities dedicated to their manufacture.

These facilities consist of several levels including air handlers and scrubbers for exhaust, HEPA room, fab cleanroom, and subfab areas. The control of differential pressure within the facility is essential for the safety of both equipment and personnel.

Semiconductor Fab with HEPA/ULPA Room Highlighted
Semiconductor Fab HEPA/ULPA Room

The HEPA/ULPA rooms are found in the space above a semiconductor cleanroom. This area has filtration equipment that removes particulates from the outside environment. A HEPA (high efficiency particulate air) filter and/or an ULPA (ultra low particulate air) filter is used to trap small contaminants and prevent them from entering the fab cleanroom area. The fab cleanroom has to be free of particulates, as it is where semiconductor devices such as microscopic transistors are manufactured. Something as small as a molecule from a fragrance can destroy one of these transistors, making proper filtration an essential part of the semiconductor fabrication process.  Continue reading “Monitoring Solutions for Semiconductor HEPA/ULPA Rooms”

Posted on

Importance of Monitoring IAQ During Wildland Fire Season

wildfireThis June has seen record-breaking wildfires in Canada, with many fires still raging across the provinces and territories. The blaze, which has resulted in many individuals being forced from their homes and is expected to continue throughout the 2023 wildland fire season (canada.ca), has also brought with it thick smoke/smog for Canada’s USA neighbors.  Continue reading “Importance of Monitoring IAQ During Wildland Fire Season”

Posted on

Pump Controller with Level Transmitter Control Pumps in Wastewater Lift Stations

Lift Station with pump controller and level transmitter
Lift Station with pump controller and level transmitter
Lift Station with Pump Controller & Level Transmitter

Lift stations are used to transmit wastewater to a treatment facility. In residential areas, lift stations may be located in a central point to a subdivision or community. Lift stations are pits located at points in the wastewater system to collect the wastewater and usually have two submersible pumps. In order to use gravity to move the wastewater along, it must be continually elevated to provide height to generate the flow. Wastewater in the lift station is pumped out to a higher level, from where it can flow on to the next lift station or to the treatment facility. As excavation and trenching for sewer pipes can be costly, using lift stations (and gravity) saves a substantial amount of money.  Continue reading “Pump Controller with Level Transmitter Control Pumps in Wastewater Lift Stations”