
Hanna Instruments HI-703004L Pool Line Electrode storage solution, 500 mL bottle
Keep one step ahead on the maintenance front by always storing your Pool Line electrode in Hanna’s new Pool Line Storage Solution.
Hanna’s new Pool Line 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.
Please note: 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.
HI-703004L Pool Line Electrode Storage Solution (500 mL)
HI-703004L is a storage solution prepared with reagent grade chemicals which can be used to ensure maximum performance of your Pool Line pH and ORP electrodes.
After cleaning your electrode with one of our wide range of cleaning solutions, rinse with tap water, then soak the electrode in Hanna specially formulated Storage Solution before taking measurements. pH 4.01 or pH7.01 buffer solution can be used if Storage Solution is running low.
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.
Specifications
| Description | Electrode Storage Solution |
| Package | Bottles |
| Size | 500ml |
| Quantity | 1 |
| Certificate of Analysis | No |

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.