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keller小型壓阻式 PA-21PY/PAA-21PY

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keller小型壓阻式 PA-21PY/PAA-21PY

keller PAA-21PY PA-21PY

Series 21 PY "Pisello"

Piezoresistive Miniature Pressure Transmitters

Ultramodern welding techniques and advances in the miniaturization of electronic circuits now make it possible to manufacture a pre-insulated, piezoresistive micro-transmitter with properties that were no more than a dream 10 years ago.

The circuit is based on the PromComp principle which KELLER offered in a separate version as a laboratory device 20 years ago when it attained accuracy of 0,1 %FS over a temperature range of 100 K. In those days the electronic circuitry was the size of a cigar box, but now it can be accommodated on a print that is a mere 12 mm in diameter.

Although this digital component is only slightly more expensive to produce than an analog circuit, it allows a piezoresistive sensor to be calibrated to an accuracy of 0,5 %FS over a potential temperature range of 100 K.

Supply	8…28 V
Pressure Ranges	from 10 bar FS to 600 bar FS (abs.)
Output	3-wire: 0,5...4,5 V (not ratiometric)
Linearity (best fitted straight line)	Standard: max. ±0,5 %FS Premium: max. ±0,25 %FS