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Evol Empire Calibration


We strive to produce consistent,  intricate clean pieces.  To do so, is quite a process from the beginning to end.  One very important component of our quality control process is calibration.  Each piece is measured and water tested to ensure consistency and function.  

We worked closely with Engineers to design and create a system to test the flow, volume, and restriction of each piece.  At the end of the calibration process, a number is assigned that corresponds to the piece's flow rate that identifies the pull as either a loose (easy) pull or more restrictive (chuggy) pull.  

What We Measure


This is the constant.   It is measured at a median 40 standard cubic feet/hr (SCFH), which we estimate is the number that we see optimal function occur.  This is set as our calibration (Flow) number.  

Water (H20)

This is the amount of water (mL) in the piece when we see full function and recycling occurs at 40 SCFH.  This water level is used for quality control testing and will vary based on the individual's preference.


This identifies the water resistance.  It will dictate how chuggy or loose it pulls. We use  a digital vacuum gauge attached to a Raspberry Pi with a custom program that measures vacuum in inches of water.  When the gauge reaches 40 SCFH, the corresponding number becomes the Vac number.  The higher the number the more restrictive flow (chuggy).


The height is measured in inches (+-1/8").  


We measure the volume by submerging the piece completely in water, ensuring no air bubbles are trapped, then pouring the water into a graduated cylinder to measure in milliliters.  This identifies how much space within piece regardless of height.

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