"jim" > wrote in message
...
> On Jan 31, 11:18 pm, "frederick ploegman" >
> wrote:
>> "jim" > wrote in message
>>
>> ...
>>
>> > On Jan 31, 5:54 pm, pp > wrote:
>>
>> > Unless you are in the UK where triple scale hydrometers made after
>> > 1983 seem to feature a different version of PA to anyone elses heh
>> > heh...
>>
>> I think the only change was to the temp standard used for calibration.
>> I still have the older ones that used 60f as the standard. I think
>> most of the newer ones use 68f as the standard. The standard used
>> should be printed on the each hydrometer. Temp compensate and
>> you should end up with the same numbers.
>
> That is a sensible deduction. However, the hydrometer one I inherited
> from my father - which matched the scale commonly used in the US - was
> calibrated to the same temperature as my current triple scale which
> doesn't match any PA system anyone else seems to use
>
> I am sure you are right in general though Frederick!
>
> Jim

Hmmmm...The ones I have also state that they are specifically
designed for use in beer and winemaking. Yours ??