Hanna Instruments-720 Calcium Hardness Handheld Colorimeter - Checker HC
The Hanna Instruments-720 Calcium Hardness Checker is a simple, accurate and cost effective way to measure low ranges of copper in water.
Checker®HC is supplied with reagents for 25 tests. Use code Hanna Instruments-720-25 (25 tests) for future purchases.
The Hanna Instruments-720 Calcium Hardness Checker is a simple, accurate and cost effective way to measure low ranges of copper in water.
Designed as a more accurate alternative to chemical test kits, the Hanna Instruments-720 provides quick, accurate results in four easy steps.
Hanna Instruments-720 uses an adaptation of the standard methods for the Examination of Water and Wastewater, 18th edition, Calmagite method. The reaction between calcium and the reagents cause a reddish-violet tint in the sample.
Ideal for
- Water purification systems
- Heating and cooling systems
- Drinking water
- Wastewater
- Plating
Key features
Small palm-sized design
- Accurate from ± 0.20 ppm ±5% of reading
- Dedicated to a single parameter
- Auto power off after 10 minutes of inactivity
- Built-in timer for timed reaction readings
Order Information
The Hanna Instruments-720 Calcium Hardness Checker is supplied with sample cuvettes with caps (2), calcium hardness reagent starter kit x 25 (re-ordering information Hanna Instruments-720-25 x 25 tests), syringes with tips (2), plastic beaker, battery, instructions and quick start guide.
Also available: Calibration set Hanna Instruments-720-11.
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.