calibration solution

[trevor peacock]

anyone make their own?
my tds meter is about ten years old, hm-digital one, never had a problem.
just wondered if i should test it for accuracy, no spots on glass so presume it's ok?

 

[Mattlekim]

anyone make their own?
my tds meter is about ten years old, hm-digital one, never had a problem.
just wondered if i should test it for accuracy, no spots on glass so presume it's ok?

You could, you can buy the sensor and amplifier modual, but then you would need a micro controller and some sort of display.

In the end the cost would not be that much cheaper and it would take you a while to write the code + solder everything together

Easiest solution would be just to by some testing fluid. That way you can see how accurate it is

 

[dazmond]

I have 2 TDS meters.they both read the same