Transmittor

[Sandra]

I am searching for a transmittor to my load cell, does anyone have any suggestions where to find a good one??

[99-1134301289]

hello, for my engine dyno project I have a load cell like that

[url=http://cgi.ebay.fr/CRANE-Hanging-Tension-Load-Cell-SCALE-5-000lbs-NEW_W0QQitemZ180183080283QQihZ008QQcategory
Z4678QQssPageNameZWDVWQQrdZ1QQcmdZViewItem]http://cgi.ebay.fr/CRANE-H....iewItem[/url]

[86rocco1]

The dyno I use in a rather old one, it has (had) all mechanical instrumentation, it's load cell is a hydraulic cylinder which connects to a pressure gauge to display torque, I connected a Honeywell MLH pressure sensor similar to to the hydraulic load cell

[Sandra]

I think we have a missunderstanding. I already have a loadcell. What I am looking for is the device that transform the signal from the loadcell to analog output, for example 0-10V.

[bruce]

You need a Signal Conditioner.

[Tony]

Perhaps more commonly known as a "strain gauge amplifier". I did look on e-bay but found nothing at all listed at the moment. If you are patient, something may eventually turn up. Otherwise buying new may be the only alternative.

More often than not, these strain gauges connect up direct to a multi channel data acquisition system. Finding an individual single channel strain gauge external amplifier, all by itself might be difficult. But something like this TMO-1 perhaps ?



Google might pick up alternatives more to your taste.

That TMO-1 was just the first Google hit I came to. It illustrates the sort of thing needed to do the job. I am in no way recommending it, there may be better alternatives if you search further. But it would probably do the job.

My own dyno does not use a strain gauge load cell, so I do not have this problem.

[bruce]

[49-1183904562]

Sandra;

It would help if we know what is the output of your load cell? Mechanical, Analog voltage etc. "Details"
It sounds like you are trying to feed an ADC for analisys.

Rick

[Tony]

Load cells all work in pretty much the same way. There are usually four strain gauge elements connected in a bridge circuit, with four external connecting wires connected to an external power source, and an amplifier:



Electrical output is always extremely low, usually only a few millivolts, and a very high quality amplifier and very stable power source for the bridge element are required. It is not the sort of thing you can successfully build yourself, unless you really know what you are doing.

A zero to ten volt full scale analog output is fairly standard for most commercial strain gauge amplifiers, so you should be o/k.