Our Total Hardness Low Range handheld checker offers you a middle ground between advanced instrumentation and your typical chemical test kit. Standard test kits have limited accuracy since they rely upon the human eye to match colors. Our handheld colorimeter eliminates the hassle of matching to a color chart by providing a direct Total Hardness Low Range result digitally.
Range: 0 to 350 ppm (mg/L) as CaCO₃
Get simple results with easy one-button operation.
Don’t waste time matching to a color chart anymore, get direct results quickly.
Easier to use and more accurate than chemical test kits
Dedicated to a single parameter
Small size, big convenience
Ideal for: Drinking and process water, heating and cooling systems, swimming pools and spas.
Specification
Specification Name
Detail
SKU
HI735
Range
0 to 350 ppm (mg/L) as CaCO3
Resolution
1 ppm (mg/L)
Accuracy @ 25°C/77°F
±6 ppm ±6% of reading @ 25 °C (77 °F)
Light Source
Light Emitting Diode @ 470 nm
Light Detector
silicon photocell
Method
Adaptation of the EPA recommended Method 130.1. The reaction between calcium, magnesium, and the reagents causes a red-violet tint in the sample.
Battery Type
1.5V AAA Alkaline
Auto-off
after ten minutes of non-use
Environment
0 to 50 °C (32 to 122 °F); max. 95% RH non-condensing
Dimensions
86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight
64 g (2.3 oz)
Ordering Information
Each HI735 is delivered in a case with custom insert and is supplied with Total Hardness Low Range reagent starter kit (reagents for 12 tests), Sample cuvette and cap (2 pcs.), 1 mL graduated syringe with tip (2 pcs.), Plastic refilling pipette (1 pc.), 1.5V AAA alkaline battery (1 pc.), and Instruction manual.
Reagent Set
HI735-25 (25 tests)
Calibration Set
HI735-11
Warranty
1 year
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.
