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Soil slurry

Not quite sure if this is going to help or hurt but I worked in an environmental lab for over 30 years and used ph meters several times a day for years with some costing over a grand. We always rinsed with DI. Stored in ph 7 ref when not in use. Had to refill the probes every once in a while with KCl due to evaporation. These were certified by the state and feds every year. Never had any problems with DI. Absolutely had to use it. Then a quick wipe with a Kimwipe and back in the reference soln.
 
Yeah You can clean it up no problem but im sure You werent measuring distiled water ph over and over, like farmer said maybe the key is storing in the right solution, cheaper meters don't even come with a solution
 
Bowhunterwoody I may self have only ever owned two pH meters but from what I understand from looking at multiple brands they all seem to use the same prob type at the price range most home growers go with, I have never looked at a meter that was over a grand do they use the same prob type as cheaper ones (like $50-$200 rang)?
9fingerleafs same guy told me either KCL or calibration and none of this is brand-specific like I use general hydro calibration 7.0 and sometimes I use Blue Lab solutions, depends on what my supplier (hyro shop) has when I visit. Not saying he knows everything but he does sell the products. and yeah my first $20 meter came with no solution you had to buy separate it also didn't have Automatic temp compensation either so I had to really watch my temp to even be able to trust it.
 
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TheGoodFarmer yea it has more to do to with # if significant digits. Some are accurate out to three places with temp and pressure compensation. Commercial type. Not what most growers use or need. Like 9fingerleafs says you def don't want to store in DI. Rinsing is ok but we always stored in ph 7 buffer. Of course these meters we're never really stored long term.
Calibrated daily and used several times daily. As to probes, most were glass and membrane types cleaned often in dilute acid and soaked and filled with KCL
 
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