Hanna Instruments-50021P Check Solution, 20mL, 25 sachets
Hanna Instruments-50021P is a premium quality calibration check solution used exclusively for the Hanna Instruments-9813-6 portable pH/EC/TDS/Temperature meter. Each sachet has the lot number and expiry date stamped on it and is made of light block foil ensuring freshness each time one is opened.
The Hanna Instruments-50021P has 25 single use sachets containing 20 mL of solution that is used to verify the calibration and functionality of the pH electrode.
Hanna Instruments-50021P is a premium quality calibration check solution produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers. It is specially formulated for use with the Hanna Instruments-9813-6 portable pH/EC/TDS/Temperature meter. It allows the user to check the meter’s calibration status at any time by simply rinsing the probe with water and immersing it in the solution. The meter will indicate the probe’s condition.
Convenience of individual packaging
- Ideal for field use due to portability
- Every sachet is as fresh as the day it was packaged
Each sachet marked with lot number and expiry date
- Hanna solutions are specially formulated to have an expiry of 5 years from manufacture for an unopened sachet.
Light block packaging
- Prevents any oxidation from UV light that could affect quality
CAL-CHECK™ FEATURE / CLEAN & CAL PROCEDURE
The unique Cal-Check™ feature allows the user to check the meter calibration status at any time. Simply follow the procedure outlined below for a quick assessment of the calibration status.
1) Rinse the probe with water.
2) Immerse the probe in the Hanna Instruments-50021 check solution.
3) Press the Check key.
4) If the meter is calibrated “Probe is OK” message is displayed.
5) If cleaning is needed “Clean Probe and Calibrate” message is displayed.
6) Immerse the probe in appropriate cleaning solution (i.e. Hanna Instruments-700661) for 5 minutes, then rinse it with tap water.
7) Immerse again in the Hanna Instruments-50021 check solution and press the CHECK key. If the message “Probe is OK” is displayed, the meter does not need calibration. If the message “Clean Probe and Calibrate” is displayed then calibration must be performed.
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.