
Hanna Instruments HI-4004-45 Conditioning and Storage Solution for Calcium ISE, 500ml
Conditioning and storage solution for Calcium ISE, 500mL. Keep one step ahead on the maintenance front by always storing an electrode in Hanna Storage Solution.
Hanna Storage Solution will keep your electrode in tip top condition by not allowing the sensor tip and the reference junction to dry out. It will also minimise any bacterial growth while not in use – all vital for an optimum response time and result.
pH or Oxide Reduction Potential (ORP) electrodes should never be stored in distilled or deionised water as it will shorten the life of the sensor. Also, check our range of special storage solutions. For example: Sodium ISE Storage solution.
HI-4004-45 Calcium ISE Conditioning and Storage Solution (500ml)
The HI4004-45 solution is for the conditioning and storage for the HI-4004 and HI-4104 calcium liquid membrane Ion Selective Electrodes (ISEs). Measurement of calcium in solutions is determined by calcium ion exchange through the organic polymer membrane. The membrane of the half-cell or combination calcium ISE should be pre-soaked in HI-4004-45 solution for at least half-an-hour before calibration to optimise the sensor response.
Between measurements, storage solutions minimise microbial growth and prevent any effects of diffusion and Osmosis, as well as keeping the sensor tip and reference junction hydrated and clear – all important for an optimum response time and measurement.
Air-tight bottles with tamper-proof seals ensure quality and freshness of storage solution. Each bottle is marked with a batch number and expiry date.
Special range:
Sodium ISE Storage Solution – HI-401645L – for use with a FC300B Sodium Ion Selective Electrode (ISE)
Conditioning and Storage Solution for Calcium ISE – HI-400445L

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?
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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.