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A re-sealable bottle containing 500ml of Hanna Instruments (HI-70300) storage solution. Always store your electrode in a solution to ensure the junction does not 'dry out'. This will improve the performance of the electrode as well as prolonging the operational life.
Recommended for use with:
* Pocket Waterproof Conductivity, pH and TDS Tester (Low Range)
* Pocket Waterproof Conductivity, pH and TDS Tester (High Range)
* Compact & Waterproof pH Meter
* pHep4 Pocket pH & Temperature Meter
* pHep5 Pocket pH & Temperature Meter
* 'Champ' Pocket-sized pH Meter
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The packaging of both books was superb and they are in pristine condition. Thank you again for the service.
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