|
Fluid Level Detectors / Monitors
Last Updated on:
Friday, April 25, 2008 04:55 PM |
| Circuits Designed by Dave Johnson, P.E. : |
|
|
-
Low Value Capacitance Meter
This circuit was originally designed to measure the volume of fluid inside a medical syringe. As designed, it produces a zero to 5
volt output, corresponding to a capacitance change of about 10 picofarads. With a digital voltmeter, at its output, it can resolve a
capacitance change of 0.002 picofarads or 2 femtofarads.
|
|
| Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors: |
|
|