Hanna Instruments-711 Total Chlorine Handheld Colorimeter - Checker®HC
Ideal for swimming pools, spas and aquariums.
Chlorine is the most common water disinfectant. Once in water, it presents as free chlorine and total chlorine.
Checker®HC is supplied with reagents for 6 tests. Use code Hanna Instruments-711-25 (25 tests) for future purchases.
Ideal for swimming pools, spas and aquariums
Chlorine is the most common water disinfectant. Once in water, it presents as free chlorine and total chlorine.
Free chlorine is the chlorine that is available in the water to tackle bacteria. As the process of disinfection takes place, the levels of free chlorine will reduce. Total chlorine is the measurement of free and used chlorine in the water.
If the total chlorine is high but the free chlorine is low or non-existent, then there is insufficient chlorine in the water to deal with the levels of contamination.
Free chlorine is the most frequently tested of the two chemicals. By checking for the two as part of a rigorous testing procedure, adjustments in chlorine levels can be made quickly and easily and a high level of disinfection can be easily maintained.
Can also be used to determine chlorine levels in fish tanks for optimum fish and plant health. Use alongside recommended dechlorinators.
Ideal for
- Swimming pools and spas
- Water and quality control checks
- Disinfection
- Waste water treatment
- Aquaculture
Main Benefits
- Testing is quick and easy
- High precision results - more accurate than chemical test kits
- Auto shut-off feature means the Checker cannot be left on by mistake
- Fully portable, fitting easily into both palm and pocket
Supplied with
- 2 sample cuvettes
- Cuvette cap
- Starter pack of reagents x 6 (re-ordering information: Hanna Instruments-711-25 x 25 tests)
- 1 x 1.5 AAA battery
- Instructions
Also available: Calibration set Hanna Instruments-711-11
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.