Pressure scanners allow the signal delivered to an instrument to be scanned or switched between multiple pressure sensors. Multi-channel pressure scanners increase the throughput and productivity of costly instrumentation. Pressure scanners provide high accuracy, low-cost measurement of multiple pressure points and also can be daisy chained and networked to a PC or a laptop computer to form a low-cost distributed data. There are many different types of pressure scanners. Examples include miniature electronic pressure scanners, electronic pressure scanners, piezoelectric pressure scanners and ESP scanners. Miniature electronic pressure scanners have unparalleled long term stability, optional temperature sense output, and automatically switched reference pressures. Electronic pressure scanners are an array of silicon piezoresistive pressure sensors, one for each pressure port, whose analog outputs are electronically multiplexed through a single onboard instrumentation amplifier at ultra-high rates using binary addressing. Piezoelectric pressure scanners are designed to move in various directions (X, Y, Z) by expanding in some directions and contracting in others, depending upon the polarization of applied voltage. ESP scanners incorporate a two position manifold actuated by momentary pulses of control pressures. Other pressure scanners are commonly available.