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hanna instruments digital refractometer


Nickbruh510

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Nickbruh510

i have a digital refractometer. i bought it used a year ago i have not used it i believe it needs to be re-calibarted. it seems to be .010 off exactly it shows 1.013 when on my refractometer my handheld one shows 1.023 I'm asking 80$ down for a trade it worked perfect a year ago but has just been in a rubbermaid f=container about 5 months if interested ket me know thanks anyone with any knowledge about these would be great.let me know thanks!

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