What is residual hardness measured for?

The residual hardness is the degree of hardness remaining after water treatment (e.g. softening, ion exchange). It is an important control parameter for the function of water softeners and water treatment systems.

This test set is available in three units:

• 0 – 2 °dH (German hardness) – standard in Germany
• 0 – 2 °fH (French hardness)
• 0 – 20 ppm CaCO₃ – International unit

The Scientific series from CALDUR® offers maximum precision for low hardness ranges thanks to innovative syringe titration. Intermediate values can be read directly from the scale.

How does the test set work?

The CALDUR® Residual Hardness Scientific test set uses a precise dosing syringe for titration. Two reagents are added to the water sample, then the titration solution is added using the syringe. The measured value is read directly from the syringe scale – no drop counting required!

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for regular checks of softening systems

• Highest precision through syringe titration

  Stepless reading enables intermediate values – no drop counting required

• Three units available

  °dH, °fH or ppm – choose the right unit for your application

• Approx. 200 provisions per set

  Particularly economical due to high number of possible measurements

• Optimized for low hardness ranges

  Specially designed for the control of treated water

Der Beitrag Caldur® Residual hardness – Scientific erschien zuerst auf RLS Wacon analytics.

What is the PM value measured for?

The PM value (p-value and m-value) describes the acid and base capacity of water and is a central parameter in boiler water and cooling water monitoring.

The p-value (phenolphthalein value) indicates the base capacity up to pH 8.2 and shows the concentration of hydroxide and carbonate ions. It is particularly important for monitoring alkalinity in boiler water and cooling water systems.

The m-value (methyl orange value) indicates the total alkalinity up to pH 4.3 and also includes the hydrogen carbonate ions. It is a measure of the total acid capacity of the water.

The Scientific series from CALDUR® offers maximum precision and user-friendliness thanks to the innovative syringe titration. Intermediate values can be read directly on the scale without having to count drops.

How does the test set work?

The CALDUR® PM-Wert Scientific test set uses a precise dosing syringe for titration. The water sample is mixed with the reagents, then the titration solution is added with the syringe. The measured value is read directly from the syringe scale – no drop counting required!

The measuring range covers 0-20 mmol/l for the p-value and m-value. The stepless reading enables a significantly higher precision than conventional drop titrations.

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for regular checks – faster than conventional drip titrations

• Highest precision through syringe titration

  Stepless reading enables intermediate values – no drop counting required

• Measuring range 0-20 mmol/l

  Covers the entire field of practical relevance

• Approx. 100 provisions per set

  Particularly economical due to high number of possible measurements

• p-value and m-value can be determined

  Comprehensive alkalinity determination with one test kit

Der Beitrag Caldur® PM value – Scientific erschien zuerst auf RLS Wacon analytics.

What is total hardness measured for?

The total hardness of water describes the sum of all alkaline earth ions, mainly calcium (Ca²⁺) and magnesium (Mg²⁺). It is an important parameter for drinking water quality, boiler water and industrial processes.

This test set is available in three units:

• 0 – 20 °dH (German hardness) – standard in Germany
• 0 – 20 °fH (French hardness)
• 0 – 200 ppm CaCO₃ – International unit

The Scientific series from CALDUR® offers maximum precision and user-friendliness thanks to the innovative syringe titration. Intermediate values can be read directly on the scale without having to count drops.

How does the test set work?

The CALDUR® Total Hardness Scientific test set uses a precise dosing syringe for titration. Two reagents are added to the water sample, then the titration solution is added with the syringe. The measured value is read directly from the syringe scale – no drop counting required!

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for regular checks – faster than conventional drip titrations

• Highest precision through syringe titration

  Stepless reading enables intermediate values – no drop counting required

• Three units available

  °dH, °fH or ppm – choose the right unit for your application

• Approx. 200 provisions per set

  Particularly economical due to high number of possible measurements

Der Beitrag Caldur® Total hardness – Scientific erschien zuerst auf RLS Wacon analytics.

What is carbonate hardness measured for?

Carbonate hardness (temporary hardness) is an important parameter in water chemistry and provides information about the concentration of hydrogen carbonate and carbonate ions in the water. It is part of the total hardness and plays a decisive role in the buffering capacity of the water (pH stability).

Monitoring carbonate hardness is essential in boiler systems, as carbonate hardness precipitates and forms scale when heated. This impairs heat transfer and can lead to serious damage to the system. The carbonate hardness in boiler water should be as low as possible (< 0.5 °dH). The Scientific series from CALDUR® offers maximum precision and user-friendliness thanks to the innovative syringe titration. Intermediate values can be read directly on the scale without having to count drops.

How does the test set work?

The CALDUR® Carbonate Hardness Scientific test set uses a precise dosing syringe for titration. Two reagents are added to the water sample, then the titration solution is added with the syringe. The measured value is read directly from the syringe scale – no drop counting required!

This method enables a continuous reading in the range from 0 to 20 °dH and offers significantly higher precision than conventional drop titrations. The resolution is at least 0.5 °dH, whereby intermediate values can also be read without any problems.

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for regular checks – faster than conventional drip titrations

• Highest precision through syringe titration

  Stepless reading enables intermediate values – no drop counting required

• Wide measuring range from 0 to 20 °dH

  Covers all practical areas from boiler water to raw water

• Approx. 200 provisions per set – economical in continuous use

  Particularly economical due to high number of possible measurements

• Convenient handling with dosing syringe

  Ergonomic design for fatigue-free working

• Robust plastic housing

  Safe transportation and protection of components

Der Beitrag Caldur® Carbonate hardness – Scientific erschien zuerst auf RLS Wacon analytics.