Looking for a EC Meter Cheapish and a PH test kit, actually even a old fashioned colour chart one that I can combine soils in to test. Any ideas in Chonburi Province or Rayong area?

Swimming pool shops/suppliers have Ph test kits.

you won;t find an electronic one around pattaya or rayong .. only in BKK, but expect to pay 7000bt + for one.

only other options would be as mentioned a pool or perhaps one of the many aquarium shops.

other than that ebay is you best bet. avoid the large stick types as they are not acurate and break easily

from china or HK delivery will be under 1 week.

Here's a site that has Ec Meters in Bangkok:

http://www.conductivity.ponpe.com/

You could have it shipped to you.

They have some Ec Meters for about 3000 baht. and combination Ec/pH Meters for about 7000 baht. Seems to be about twice the price for the same device in the US.