K-1705 Hardness Calcium

K-1705 Hardness Titrets Kit is used to determine Hardness levels from 50-500 ppm

Hardness Information


Why Choose CHEMetrics Titrets?

CHEMetrics Titrets self-filing reagent ampoules make it easy to perform quick, accurate titrations of water samples. The handheld titrettor that comes with the kit allows the user to easily and reliably control the flow of the solution being measured without the need to count drops or use burets or other equipment. This unique design allows you to perform a titration anywhere and achieve reliable results for a variety of substances.

Safe and Reliable Results

While traditional methods often require multiple steps and thorough preparation, these test kits allow you to obtain dependable results with a few simple steps. By simplifying the testing method, Tritrets test kits reduce the potential for operator error. Additionally, each of the ampoules contained in the test kits is vacuum sealed which helps eliminate the problem of obtaining inaccurate results from stale or unstable reagents. These reagents are stored right in the tip of each ampoule and sealed in glass, thereby minimizing direct contact with the chemicals.

What's included:

  • 30 self-filling Ampoules with valve assemblies
  • 1 25 mL Sample Cup
  • Neutralizer Solutions
  • Titrettor
  • Instruction Manual


The EGTA method is specific for calcium hardness. The EGTA titrant in alkaline solution is employed with a zincon indicator. Results are expressed as ppm (mg/L) CaCO3.

Shelf-life: eight months. Although the reagent itself is stable, the endpoint indicator has a limited shelf-life. We recommend stocking quantities that will be used within seven months.



How to use:

Note: Images used in the following table show a total hardness and colors may differ from the ones shown. Read written instructions to know what color changes to expect from your substance.

1. Fill the sample cup to the 20 mL mark with the sample to be tested. 2. Add 5 drops of the Neutralizer Solution. Stir to mix the contents of the cup. Wait 30 seconds.
3. Snap the tip of the ampoule at the black snap ring. 4. Lift the control bar and insert the Titret assembly into the Titrettor.
5. Hold the Titrettor with the sample pipe in the sample. Press the control bar firmly, but briefly, to pull in a small amount of sample. The contents will turn blue to very dark blue (black). Wait 30 seconds. 6. Press the control bar again to draw another small amount of sample into the ampoule.
7. Rock the entire assembly to mix the contents of the ampoule. Watch for a color change from blue to colorless. Repeat steps 6 and 7 until a permanent color change occurs. 8. When the color of the liquid in the ampoule changes to colorless, remove the ampoule from the Titrettor. Hold the ampoule tip pointed upward and read the scale opposite the liquid level. Results are expressed in ppm sulfite.


WARNING! This product can expose you to chemicals including ethylene glycol, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.


More CHEMetrics Kits for Calcium

Product Number Method MDS Range Price
K1705 EGTA (calcium) 50 ppm 50-500 ppm as CaCO3 $33.00
K4502 EDTA (total) 2.0 ppm 2-20 ppm as CaCO3 $33.00
K4520 EDTA (total) 20 ppm 20-200 ppm as CaCO3 $33.00
K4585 EDTA (total) 100 ppm 100-1000 ppm as CaCO3 $33.00


Downloads and Links:

Calcium Information

Safety Data Sheet


More Information
Manufacturer CHEMetrics
Call For Price No
Gas Hardness
4-20 mA Output No
Voltage Output None
Power Requirements 4 AAA Batteries
Datalogging No
Warranty 1 Year
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