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From: Geir Holmavatn on 20 May 2010 05:33
Hi,

I'm looking for non-contact current sensors for 0-60/70A AC connected to
some digital interface (1-wire, GPIB, RS422, ethernet etc). The
measured cable should run through a hole in the sensor and not be
galvanically connected.

I need to monitor and register AC current with a computer from different
appliances...

Thanks for comments and tips on where I can find such sensors..

regards Geir
From: Bennett Price on 20 May 2010 12:33
Look at:
http://www.davis.com/catalog/product_view.asp?sku=6847977&pfx=
and
http://www.coleparmer.com/catalog/product_view.asp?sku=1880820&pfx=
(add your own donut current xformer)


On 5/20/2010 2:33 AM, Geir Holmavatn wrote:
> Hi,
>
> I'm looking for non-contact current sensors for 0-60/70A AC connected to
> some digital interface (1-wire, GPIB, RS422, ethernet etc). The measured
> cable should run through a hole in the sensor and not be galvanically
> connected.
>
> I need to monitor and register AC current with a computer from different
> appliances...
>
> Thanks for comments and tips on where I can find such sensors..
>
> regards Geir

From: David Nebenzahl on 20 May 2010 13:38
[please don't top-post]

On 5/20/2010 9:33 AM Bennett Price spake thus:

> On 5/20/2010 2:33 AM, Geir Holmavatn wrote:
>
>> I'm looking for non-contact current sensors for 0-60/70A AC connected to
>> some digital interface (1-wire, GPIB, RS422, ethernet etc). The measured
>> cable should run through a hole in the sensor and not be galvanically
>> connected.
>>
>> I need to monitor and register AC current with a computer from different
>> appliances...
>>
>> Thanks for comments and tips on where I can find such sensors..
>
> Look at:
> http://www.davis.com/catalog/product_view.asp?sku=6847977&pfx=

Hmmm; only $255 ...

> and
> http://www.coleparmer.com/catalog/product_view.asp?sku=1880820&pfx=
> (add your own donut current xformer)

Not a sensor, but whatever ...

How 'bout an inexpensive current xformer, which seems to be what the OP
wants?


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)
From: whit3rd on 20 May 2010 16:49
On May 20, 2:33 am, Geir Holmavatn <gei...(a)gmail.com> wrote:
> Hi,
>
> I'm looking for non-contact current sensors for 0-60/70A AC connected to
> some digital interface (1-wire, GPIB, RS422, ethernet etc).  

> I need to monitor and register AC current with a computer from different
> appliances...

There's three obvious branches: you can go the full industrial-
automation
route (with DIN racks, enclosures, modules) - about $100-300 per
module,
and they'll talk RS-485 or Ethernet, or.... www.bb-elec.com has a
catalog
of this kind of thing, but I haven't used them.

You can go the flexible-but-crufty route, and use any old ammeters,
with a video camera aimed at them. The computer just captures
some images, at the end of the day you can review it all.

The slickest solution, though, is to park a data logger (small
battery-powered
recording meter) at the appliance, and occasionally download its
contents by walking over and plugging it into your laptop.
From: Geir Holmavatn on 20 May 2010 17:09
Den 20.05.2010 19:38, skrev David Nebenzahl:

> How 'bout an inexpensive current xformer, which seems to be what the OP
> wants?

I need a *digital* interface which can be read / monitored by a computer.

The Coleparmer module does the trick, but it just goes to max 25A and I
hoped such modules would be less expensive than those...

Other comments?

rgds

Geir
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