Hanna Instruments-761 Total Chlorine Ultra Low Range Handheld Colorimeter, Checker HC - Expired Reagents
Designed as a more accurate alternative to chemical test kits, this checker provides quick, accurate results in four easy steps.
The Hanna Instruments-761 uses an adaptation of the USEPA method 330.5. The reaction between the chlorine and DPD reagent causes a pink tint in the sample.Features
Small palm-sized designAccurate from 5ppb 5% of reading
Dedicated to a single parameterUses a single AAA battery
Auto Power Off after 10 minutes in inactivityBuilt-in timer for timed reaction readings
Ideal for:
Water QualityEducation
Water PurificationEnvironmental
Order Information:
The Hanna Instruments-761 Checker is supplied with 2 cuvettes and caps, reagent starter kit (6 packets for total chlorine ultra-low range - re-ordering information Hanna Instruments-761-25 x 25 tests), 1 x 1.5V AAA battery, and an instruction manual.
Also available: Calibration set Hanna Instruments-711-11
Four steps. One click. Instant Readout.
1. Zero the CheckerHC with your vial inside
3. Place your vial into your CheckerHC
- The HI-723-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Chromium VI High Range Checker HC
- These reagents follow the Diphenylcarbohydrazide Method in which the reaction between chromium VI and the reagent causes a purple tint in the sample. By simply adding the packet of HI-723-25 reagent to the sample, the reaction will take place and the HI-723 will determine the concentration from the colour that is produced.
- The HI-723-25 are the replacement reagents for the HI-723 Chromium VI High Range Checker HC 25 Tests Sku: HI-723-25
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.