Hanna Hydroponics pH Tester $85.90
Bluelab pH 4.0 Calibration Solution $6.00$21.60

In stock

Sku:9421024920333

$6.00

In stock

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  • pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings.
  • pH instruments are calibrated to pH 7.0 first  then to pH 4.0.
  • The 2.77EC Conductivity solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/CF probe.
  • Calibration Solutions should be stored in a cool place out of direct sun and heat.
  • 20ml.

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