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ContinuousWave: Small Boat Electrical
Sensing DC Current Flow
|Author||Topic: Sensing DC Current Flow|
posted 05-02-2010 09:44 AM ET (US)
Please suggest a very low cost way to sense the flow of 12-volt DC current which does not involve monitoring the voltage drop across a resistor in series with the current flow. I suspect the solution will involve a Hall-Effect sensor. I would like the solution to be a single package device, such as an integrated circuit. I would like the device to cost in the range of $5 to $10 per circuit.
posted 05-02-2010 01:30 PM ET (US)
What accuracy are you looking for? Can the current carrying wire be put through the device? Are you able to power the current measuring device? Can you use a component with PC pins? What is the current range you are trying to measure?
For a device that can be placed in the current path:
For a device you can pass a wire through:
If the wire needs to pass through with a connector attached:
The output of these devices is a voltage that is proportional to the current flow. They will measure DC and AC RMS currents.
E.mail me offline if you want a sample.
Something you may want at look at for your UPS battery monitoring system:
posted 05-02-2010 02:22 PM ET (US)
Dave--Thanks for the pointer to the information on the LEM product.
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