
Hanna Instruments HI-4016-46 Sodium conditioning solution (500 mL)
HI-4016-46 is a 500 mL bottle of conditioning solution made specifically for Hanna’s FC300B Sodium Ion Selective Electrode (ISE).
Before using the FC300B Sodium electrode for the first time, or if reactivating it after storage, the electrode should be conditioned with HI-4016-46, then soaked in the HI-4016-45 storage solution, and calibrated before measurements are taken. By conditioning the glass membrane, a thin layer of glass is removed, exposing a fresh surface in which Sodium ion exchange can occur. Using the HI-4016-46 will ensure optimum measurement performance from the FC300B Sodium ISE.

Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.