Caravan yards would have one & I'm sure that they would let you use it to check your weight in a corner of their yard.
If not, you can do the job with a pair of bathroom scales with a light plank between them & the towball on a vertical piece of timber on the centre of the plank. Add the readings of the two scales & subtract he weight of the plank & vertical timber.
Another method is to go to a public weigh bridge ...
Weight 1 ... Van & jockey wheel on the weigh bridge.
Weight 2 ... Van wheels on the weigh bridge & jockey wheel (or hitched tow vehicle) off the weigh bridge.
We met someone (not a forum member) in Burra who had a set. ($170.00) Said he bought them at a caravan show. We doubted his use of them (not the correctedness of them)
-- Edited by Dunmowin on Wednesday 14th of March 2012 10:23:22 PM
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DUNMOWIN is no longer on the road and still DUNMOWIN!
i found 1 last night there really a jockey wheel with scales built into them . i will send a pick when it gets here also will have it at the gympie bash for those who want to check out there weights