This SMS transmittal service has to done by the weigh scale operator, as part of their service, or by your driver via a SMS enabled cell phone.

In todays competitive world, ask all the weigh scale operators you can use if they have this service.

If not, the man needs to do it, if he is trustable. If he is the scrap suppliers driver in their truck(and hence cannot be trusted), you might have to go with stamped tickets that are faxed or ?

Depends how much money you want to spend.

You can build your own using an old Nokia phone, an F bus cable and a processor retransmitting data sent from the weigh scales. I've done this on a small production machine and it worked well, a cheap board for this is shown at http://www.siliconchip.com.au/cms/A_102670/article.html It doesn't do exactly what you want but a bit of programming using the free ATMEL tools will get you going.

You can ask the weigher equipment manufacturer to supply scale with this feature.

REMEMBER SMS doesn't work instantly, they send the message when it's convenient for them.

You want to text the weight to some other device, First how much do you want to spend, you will need at the least a GPRS device and then to make things simple you will need a small PLC capable of communicating with the GPRS (this is an industry machine cell phone) Maybe a photo cell to tell when the vehicle has completed entering the weigh bridge to record the weight and then another photo cell for when the vehicle begins to exit the weigh bridge to signal the PLC to send the SMS text message.

I have found in circumstances simular to what you are trying to do that it is far easier to use a generic device than to try to re-invent the device (I have also seen the project using a Nokia Cell Phone but I dont have the time or energy to use an out-dated device)

The PLC that I would would be a Unitronics, they are cheap, but the GPRS unit is probally worth more than your cell phone, but they are not to hard to set up.

The Mettler Toledo IND780 terminal has the ability to send an email message with weighing transaction information. See

www.mt.com and search for IND780.