Hanna Instruments HI-7022M ORP test solution, 470mV, 230 mL bottle
Test the precision of an Oxide Reduction Potential (ORP) Electrode with Hanna Preparation and Pre-treatment Solutions.
The HI-7022M is an ORP Solution for Platinum and Gold Electrodes and reads 470 mV at 25°C.
ORP standard solutions allow you to test the precision of ORP electrodes. For example, by immersing the electrode in HI-7022 solution, you should read 470 mV at 25°C.
The standard solutions are perfect for immersing the electrode and establishing initial readings which should fall within the 200 to 275 mV range at 25°C/77 F, for example, or within the parameters you are testing.
If the reading is outside the indicated range, clean and condition the ORP Electrode in Hanna pre-treatment solution. Use HI-7092 for oxidising or HI-7091 for reducing pre-treatment.
Each bottle has a Lot number and expiry date clearly listed.
All bottles have an air tight, tamper-proof seal to maintain the quality of the solution.
*A Certificate of Analysis is available on request.
Reducing and Oxidising pre-treatment Solutions
HI-7091L Reducing pre-treatment solution 500ml
HI-7091M Reducing pre-treatment Solution 230ml
HI-7092L Oxidising pre-treatment solution 500ml
HI-7092M Oxidising pre-treatment solution 230ml
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.