ST100A Series Flow Meter APPENDIX C – GLOSSARY
Fluid Components International LLC 149
APPENDIX C GLOSSARY
Abbreviations
Adaptive Sensing Technology
Fluid Components International
Ordering Information Sheet
Resistance Temperature Detector
Definitions
The flow element part that senses the fluid flow rate.
Technology (AST™)
An FCI exclusive flow measurement technique that combines both constant
Delta T and constant power measuring techniques in a single device.
Delta-R (ΔR)
The difference in resistance between the active and reference RTDs.
Delta-T (ΔT)
The difference in temperature between the active and reference RTDs.
The portion of the flow meter that conditions, converts and scales the flow signal.
The flow element part that heats the active RTD.
The enclosure attached to the flow element (usually contains the wiring
terminal block).
A flat part on the sensor head that helps to orient the sensor head to the flow.
The flow element part that senses the fluid temperature.
The enclosure that houses the flow transmitter remotely from the sensor head.
Detector (RTD)
A sensor whose resistance changes proportionally to temperature changes.
The transducer portion of the instrument. The sensing element produces an
electrical signal that is related to the flow rate, density (level sensing), and
temperature of the process media.
The flow element part that protects the heater and RTDs from the process media.
The ratio of minimum flow rate to maximum flow rate.
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