Before you know exactly the EC value of the bottle, you can easily check the gauge and / or leave oak. You obviously do not want the meter shows incorrect values.
Calibration Solution EC 1.4 is to monitor and / or oak of the EC meter. In a bottle of 300 ml.
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Bluelab pH 7.0 Calibration fluid
PH Probe Cleaner 250ml
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PH 4.0 Calibration Liquid 100ml
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EC 12.88 Calibration Liquid 100ml
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EC 3.0 Calibration Liquid 100ml
EC 1.44 Calibration Liquid 100ml
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