Mike,

 > The conductivity of saline solution has a high temperature dependance.
>
> http://www.fondriest.com/environmental-measurements/parameters/water-qual=
ity/conductivity-salinity-tds/#cond16
>
> The above suggests 2% to 4% increase in conductivity for a 1 Celsius
> increase in temperature.

You hit the nail on the head.

2 days back I prepared the solution and checked with a TDS meter. The=20
reading was about 1970 which I took it to be 2100 on my unit.

Yesterday and today the value increased on my unit. The room temperature=20
too has increased over here. It is hotter today as compared to 2 days back.

My unit shows 2400 and HM digital meter shows 2270.

My only route out now is to use temperature compensation.

Bob's suggestion of using metal film capacitor too contributed to the=20
stability of the reading.

Thanks and Cheers

Ravi

--=20
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