Get accurate water testing results with the HI701 Free Chlorine Colorimeter. With a digital read out, there is no more struggling to determine colors visually. This free chlorine tester's compact design fits in your pocket or stores easily in your shop.
Easier to use and more accurate than chemical test kits.
One-button operation makes getting your free chlorine results simple.
Great for water quality, environmental testing, and pools & spas.
The HI701 Checker®HC (Handheld Colorimeter) is a simple, accurate and cost effective way to measure free chlorine. Free chlorine is the active form of chlorine used for disinfection of drinking water, swimming pools and spas, and vegetable rinse water. Free chlorine in water is also harmful to a reverse osmosis membrane and needs to be monitored for removal from source water prior to being used. Designed as a more accurate alternative to chemical test kits, the HI701 free chlorine meter provides quick, accurate results in a few easy steps.
For use with freshwater samples
Easier to use and more accurate than chemical test kits
Dedicated to a single parameter
Small size, big convenience
Ideal for: Water Quality, Environmental, Education, Pools and Spas
0.00 to 2.50 ppm
Accuracy @ 25°C/77°F
±0.03 ppm ±3% of reading
LED @ 525 nm
adaptation of USEPA method 330.5, DPD method
(1) 1.5V AAA
after two minutes of non-use
0 to 50°C (32 to 122°F); RH max 95% non-condensing
86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
64 g (2.3 oz)
HI701 Checker®HC is supplied with sample cuvettes with caps (2), free chlorine reagent starter kit (reagents for 6 tests), battery, instructions and quick start guide.
HI701-25 (25 tests)
This website is available for the following countries: Algeria, Angola, Benin, Burkina Faso, Burundi, Cameroon, Cape Verde, Chad, Comoros, Côte d'Ivoire, Eritrea, eSwatini, Ethiopia, Gabon, Gambia, Ghana, Djibouti, Jordan, Guinea, Equatorial Guinea, Guinea-Bissau, Kenya, Lebanon, Liberia, Libya, Madagascar, Malawi, Mali, Morocco, Mauritania, Niger, Nigeria, Palestine, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Rwanda, São Tomé and Príncipe, Senegal, Seychelles, Sierra Leone, Somalia, Sudan, South Sudan, Tanzania, Togo, Tunisia, Uganda and Zambia.