Cicero brought next idea :
On Sat, 03 Jan 2009 21:32:27 +0000, D.M. Procida wrote:

I need a force gauge (or two), to measure 0-300g and 0-3kg.

I can find plenty of old brass scales for collectors, luggage scales for
weighing up to 100kg of one's excess airline baggage, and very costly
precision instruments for measuring the tiniest forces, but nothing
corresponding to the ranges I need to measure.

Do these things have another name that I could look for them under?

They need to be reasonably accurate - within 10g at the bottom of the
range.

The pictures in the service manual I'm using show a spring gauge, so I
presume that such things of suitable accuracy must be available.

Daniele

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I think the most common name is 'spring balance' as used by fishing
enthusiasts.

Cic.

Take a look on ebay, among the Honk Kong dealers pages. I bought a 30Kg
digital one for checking the contents of caravan gas bottles and it
gives 0.1Kg, of the type fishermen use - it only cost about £3-50
delivered. They do other ranges too, even gold jewelry weighing scales.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk