CLICK here for Lab Categories CLICK here for Chemical Categories

Hardness, Ca
  • Calmagite method for measuring Ca hardness
  • Lab grade accuracy
  • Self-diagnostic and error messages

Water, with exception of distilled water, contains dissolved salts (magnesium and calcium carbonates). The concentration of these salts determines the water hardness, which can be expressed in calcium carbonate or in magnesium carbonate. The sum of these two represents the total hardness level. The presence of dissolved salts is due to the fact that water often comes from underground sources which are made up of rain water filtered through deep ground layers. Rain water eventually reaches a water proof flooring and forms a natural tank which is also called the water bearing stratum. By passing through the various layers of soil and rock, rain water dissolves some of the mineral substances. Hardness is a consequence of the type of rock layers which the water passes through and of its permanence in the water bearing stratum. In addition, this parameter is also related to the phenomenon of pipe rusting in water heating and cooling systems, reverse osmosis and demineralization plants. HANNA instruments® offers two different meters to measure magnesium and calcium, results are expressed in calcium carbonate equivalent.

HI 93720 is supplied complete with 2 cuvets, battery and instructions.




Displaying items 1 - 1 of 1
SKU Name MSRP Our Price  
Image Not Available
HI96720HI 96720 : Ca & Mg Hardness Photometer
Click for details

  --- DISCONTINUED ---


$220.00 $220.00 More Details

We only sell & ship chemicals to businesses at commercially zoned locations verified by 3rd party sources. A business at a residence will not be able to buy or receive chemicals at that location. Such businesses will not be able to divert shipment in order to meet our policies. No exceptions.