Versatility is a design attribute. Thus, four independent, field-adjustable, solid-state pressure switches are available as part of Barksdale's PS4G microprocessor-based open-loop pressure controller. Eight different models accommodate pressure ranges from 0-15 psi to 0-9,000 psi. An LCD display gives operating conditions or settings. The latter are adjustable by a large membrane keypad. Each switch is set to activate on rising or falling values by a dedicated key. An internal dip switch and simple key pad command both furnish tamper prevention. A differential-pressure model handles input from two transducers, as in monitoring flows before and after filters. A built-in memory stores set points, and high and low readings during power outages. Data may also be recorded via a PC serial port. Barksdale: Product Code 4309.
An in-depth survey of 700 current and future users of 3D printing holds few surprises, but results emphasize some major trends already in progress. Two standouts are the big growth in end-use parts and metal additive manufacturing (AM) most respondents expect.
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