Water Pistol 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.

Water Pistol Pressure

Q. How do you elevate the basic water pistol experience?

A. By giving it more pressure.

Operating similar to the opposite of a hydraulic jack, a common water pistol employs Pascal’s Principle for a fluid at rest in a closed container: a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container. In equation form, it’s:

P1=F1/A1=P2=F2/A2

For the pressure to remain constant, if A1=n*A2, then F1=n*F2.

SuperSoaker water pressure

To take the water pistol to the next level, NASA engineer Lonnie Johnson conceived of the idea of a pressurized water gun with a pressure reservoir that became the Super Soaker. The ultimate Super Soaker used a constant pressure system (CPS) with a separate compression chamber that contained a thick-walled rubber balloon.

While the difference in the length and amount of the output (flow) of a standard water pistol vs. the Super Soaker vs. the CPS 2000 Mark1 Super Soaker is discussed in several blogs, the pressure in each is not. Those interested in pressure will just have to make their own measurements. All Sensors’ SPM 401 Series or CPM 602 Series pressure sensors with media isolation could provide those measurements.

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