looking for hall effect current sensor on digikey

Bobb Fwed

I'm looking for a non-contact current sensor that I can use on a circuit board. Like the clamp-on current sensors, but it would be a permanent fixture. I thought they were called hall effect current sensors, but I can't seem to find them on digikey. I would prefer one with an amplifier already built in, but is not necessary.

Something like this:
http://en.wikipedia.org/wiki/File:HallEffCurrentSense.jpg

T Chap

Here is a hall current sensor SMT part I once used.

Digi 620-1190-1-ND

Manufacturer Part Number ACS712ELCTR-20A-T

What are you wanting to do with it?

Bobb Fwed

What about the ring part?

I am going to use it to confirm current is flowing through an AC line. I can't tap into the wire itself, but I can run the wire through my device, so this is the logical solution.

T Chap wrote: »

Here is a hall current sensor SMT part I once used.

Digi 620-1190-1-ND

Manufacturer Part Number ACS712ELCTR-20A-T

What are you wanting to do with it?

W9GFO

Something like this?



http://www.mouser.com/ProductDetail/Tamura/L01Z600S05/?qs=sGAEpiMZZMtEmA642%2fnmDDerdvBq%2fpJS

Rich H

T Chap

The device I posted, just run your power through it, give it 5 volts, and it will give a DC voltage out proportional to the current.

schill

I've just started playing with a sensor board from www.pololu.com based on the ACS714 (different version of the chip T Chap mentioned).

To use them, you basically run the current directly through the chip. Everything is handled inside so you don't need a ring.

This is the one I'm using for +/-5A:

http://www.pololu.com/catalog/product/1185

They also have versions for 0-30A and +/-30A:

http://www.pololu.com/catalog/product/1187
http://www.pololu.com/catalog/product/1186

It may make sense to pick up one of these boards from Pololu to play with and see if the chip will do what you want. The boards are only $9 or $10.

sam_sam_sam

This might be what you are looking for
I hope this helps

http://www.mouser.com/ProductDetail/Honeywell-Microswitch/CSLA2DH/?qs=sGAEpiMZZMsPDRSCoHb1X14jKaQcUE8e30HTnTAPE2g%3d

or

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=480-1994-ND

Bobb Fwed

@Sam & @W9GFO: yes that is what I am looking for.

T Chap wrote: »

The device I posted, just run your power through it, give it 5 volts, and it will give a DC voltage out proportional to the current.

But, I do like this: very simple. I see it has four ratings for voltage: 2100VAC, 184Vpeak, 1500VAC, and 354Vpeak. Which one do I go off of? I don't need UL certification, but I will be running at around 500+VAC. So what's the lowdown on that? To use this, I will have to find a safe way to access the wire, but that shouldn't be too big of a problem.

stamptrol

As long as your AC cable is normally insulated, you'll be fine. After all, the cable is designed to lay on grounded metal or against a similar cable of opposite polarity.

The 2100VAc, 1500 VAc are the isolation voltages from the cable to the low voltage side of the transducer. 1500 VAC is fine.

Also note that some transducers, when measuring AC put out a varying DC signal that swings from 0 to 5 volts or from -4 to + 4 as the AC wave changes. Make sure you get the version you need.