11/8/2012 5:11 PM
I'm in the market myself. I ran into and talked to the guys from Spectrum this past Monday at the Irrigation Association show. Their EC Meter with the 24" probe is what they recommended. The longer probe will save your back and has a replaceable tip, whereas the shorter one does not. The part # is 2265FSTP and it runs $445.
As soon as I can, I'm going to order one. We have several of the TDR 300 moisture meters from Spectrum, and they have been high quality pieces of equipment. I expect the same from them with the EC meter.