Batteries and Pressure’s Role in Solar & Wind Power

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

Batteries and Pressure’s Role in Solar & Wind Power

In discussions about renewable energy, especially non-technical discussions, one of the key aspects is usually forgotten: the need for batteries – a lot of batteries.  In real world systems, batteries must store the surplus energy generated when the sun shines and the wind blows for use when they do not. While there is ongoing research into different battery chemistries, today’s most common battery for renewable energy systems, especially off-grid solar power systems, is a variation of the venerable lead-acid design commonly used in cars. These batteries provide backup power today for medical telecommunication, utility, security and other applications where a power disruption would cause major problems.

The most advanced types use a valve-regulated lead-acid (VRLA) design, for wet cell (flooded), gel and absorbed glass mat (AGM) technologies. Since they are sealed, the hydrogen generated from the negative plate and the oxygen generated from the positive plate must be regulated to avoid being lost to the atmosphere. This is accomplished through an internal self-sealing safety vent that is typically in the 3 to 10 psi range. While the regulation does not require pressure sensors in the application, pressure sensors are used in the research and development phase to verify that the design will work as promised in a variety of conditions for their design life of 20 years at 25°C.

Absorbed Glass Mat (AGM) Battery

The 1,096 ampere-hour (Ah) 48V AGM battery for an off-grid 4,590 kW solar system weighs 563*8 = 4,504 pounds (2.25 tons).

 

Grid-scale Energy Storage System unveiled by GE Power in 2018

Grid-scale Energy Storage System unveiled by GE Power in 2018
Source: GE Power on Inside Climate News.

 

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Sandblasting Pressure

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

Sandblasting Pressure

Removing paint, rust or an old finish from furniture and even polishing and finishing is less work with a sandblaster with the right abrasive and the right pressure. Small cabinet blasters often use pressures below 100 psi. In contrast, a heavy-duty sandblaster with a single-stage air compressor, air pressure over 120-150 psi is used to reduce the time involved. A pressure gauge is a common part of cabinet and portable sandblasters to obtain repeatable results.

Stark Tools 10 Gallon Air Sand Blaster

With a working pressure of 60 to 125 psi, this Stark Tools sandblaster has a 0 to 150 psi pressure gauge to obtain the desired operating pressure.
Image Courtesy of ToolPlanet.com

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Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
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Pressure Washing

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

Pressure Washing

If you had your house painted recently by a good painter, you probably saw, or at least heard, the gas pressure washer used to get the dirt and loose paint off during the prep phase. For do it yourselfers, power washers are either gas or electric powered. Gas-powered models typically have 2,000 to 3,000 psi of pressure compared with 1,000 to 1,800 psi for electric models. If the home owner is cleaning decks, siding or other large areas, the gas-powered unit is recommended. However, the higher pressure from the gas-powered unit comes with higher noise level of 85 decibels (dBA) versus around 78 dBA for an electric model. To address different applications, many units have different nozzles but, in some cases, units may also have an unloader valve for pressure adjustment. Similar to other products that do not have a pressure gauge or a pressure sensor in a control circuit, the manufacture still has to use pressure sensing in the design qualification and quality control aspects of the product.

NorthStar Cold Water Pressure Washer

Image courtesy of NorthStar
https://www.amazon.com/NorthStar-Cold-Water-Pressure-Washer/dp/B00BINVIHC

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Protecting MEMS Pressure Sensors with Parylene

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

Protecting MEMS Pressure Sensors with Parylene

Microelectromechanical systems (MEMS) pressure sensors provide accurate measurements for many applications. However, the top side of the piezoresistive MEMS pressure sensor die that has the sensing elements and potentially other circuitry cannot survive exposure to many common items that need to have their pressure measured — including water. To isolate the top surface of the pressure sensor die and other exposed circuitry, parylene is often used as a protective coating. Applied by a vapor deposition polymerization process, the parylene allows pressure to be transmitted to the top side of the pressure sensor to make measurements without damaging or impacting the reliability of the circuitry. The conformal, thin-film coating provides a moisture, chemical and dielectric barrier to protect the sensor’s critical circuitry in medical, automotive and other applications.

In fact, parylene extends the applications that a specific sensor design can address and is part of the packaging expertise that a sensor company may provide. Parylene coating can be found on a wide variety of All Sensors’ products. Specifically, parylene coating is available in all miniature digital product families such as the miniature digital DLVR, DLHR and DLLR Series as well as the millivolt output MLV series and the miniature digital and analog ELVR series.

All Sensors' E1BD Package

 

A protective parylene coating is an option for moisture/harsh media protection in the DLVR, DLHR and DLLR Series E1BD package.

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at info@allsensors.com