Pro/Forums - View Single Post

gmat · 06-04-2002, 10:28 AM

1 - generally hall effect sensors need to be powered. Usually at high voltage / low current. That explains the 4 leads.
2 - if you calibrate the sensor you can relate RPM to flow rate - because basically it's a volumetric sensor (most flow sensors work this way BTW). The accuracy loss will then be due to turbulence passing between the impeller and the casing without pushing the impeller in the right direction. This will only happen at very low / very high flow. Thats why most volumetric sensors have an operating range...

[edit] typos + voltages fumble

06-04-2002, 10:28 AM	#10
gmat Thermophile Join Date: Mar 2001 Location: France Posts: 1,221	1 - generally hall effect sensors need to be powered. Usually at high voltage / low current. That explains the 4 leads. 2 - if you calibrate the sensor you can relate RPM to flow rate - because basically it's a volumetric sensor (most flow sensors work this way BTW). The accuracy loss will then be due to turbulence passing between the impeller and the casing without pushing the impeller in the right direction. This will only happen at very low / very high flow. Thats why most volumetric sensors have an operating range... [edit] typos + voltages fumble Last edited by gmat; 06-04-2002 at 10:30 AM.