Hanna Instruments HI-7004-012 GroLine Calibration Solution pH4.01, 120ml
HI-7004-012 is a 120 mL bottle of high quality pH 4.01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis.
Hanna calibration buffers have the lot number and expiry date clearly marked on the label. All bottles are air tight with a tamper-proof seal to ensure the quality of the solution. Hanna's line of technical calibration buffers have been specially formulated to have an expiry of 2 years from the date of manufacture for an unopened bottle.
Key Features
- Specially formulated to have an expiry date of 2 years from manufacture for an unopened bottle
- Accuracy of ±0.02 pH @ 25°C
- Supplied with a Certificate of Analysis
- Temperature chart of the actual pH value at various temperatures printed on each bottle
Hanna recommends using HI-7061-023 Groline General Purpose Cleaning Solution alongside this product.
Specifications
| Accuracy | ±0.02 pH |
| pH Value @25°C | 4.01 |
| Package | bottles |
| Size | 120 mL |
| Quantity | 1 |
| Certificate of Analysis | yes |
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.