What is the total hardness measured for?

The total hardness of water is an important parameter for water quality and describes the sum of all alkaline earth ions, mainly calcium (Ca²⁺) and magnesium (Mg²⁺). These ions originate from the natural dissolution of rocks and minerals and have a significant influence on the properties of the water.

In Germany, water hardness is given in °dH (degrees of German hardness):

• 0-7 °dH: Soft water
• 7-14 °dH: Medium hard water
• 14-21 °dH: Hard water
• >21 °dH: Very hard water

Knowing the water hardness is crucial for many applications: from the dosing of detergents and the adjustment of softening systems to the prevention of limescale deposits in pipes, boilers and industrial systems.

Hardness measurement is particularly important for: Drinking water treatment, boiler water monitoring, aquaristics, swimming pools, the food industry and industrial processes.

How does the test set work?

The CALDUR® Total Hardness Test Set GR uses the proven complexometric titration method with EDTA (ethylenediaminetetraacetic acid). In this method, the calcium and magnesium ions are bound by EDTA, with a Reagent indicating the end point by a characteristic color change.

Measuring principle: 1 reagent is added to the water sample. When the titration solution is added drop by drop, the hardness constituents bind to the EDTA. The color change from red to green indicates that all hardness constituents are bound.

Calculation: Each drop of titration solution corresponds to 0.1 °dH (for 5 ml sample) or 0.05 °dH (for 10 ml sample). The number of drops multiplied by the drop value directly results in the total hardness in °dH.

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for routine checks on site – immediate results without waiting time

• High precision due to drop-by-drop titration

  Measured value per drop: 0.1 / 0.05 °dH – exact results thanks to proven complexometric method

• 100 at 1°dH Determinations per set

  Economical for regular household, commercial and industrial checks

• Clear color change from red to green

  Clear endpoint recognition – easy to read even for inexperienced users

• Flexible sample volume (5 ml or 10 ml)

  Higher accuracy with 10 ml sample due to halved drop value

• Robust, waterproof plastic housing with hinged lid

  Safe transportation and protection of reagents – durable even under harsh conditions

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

What is the total hardness measured for?

The total hardness of water is an important parameter for water quality and describes the sum of all alkaline earth ions, mainly calcium (Ca²⁺) and magnesium (Mg²⁺). These ions originate from the natural dissolution of rocks and minerals and have a significant influence on the properties of the water.

In Germany, water hardness is given in °dH (degrees of German hardness):

• 0-7 °dH: Soft water
• 7-14 °dH: Medium hard water
• 14-21 °dH: Hard water
• >21 °dH: Very hard water

Knowing the water hardness is crucial for many applications: from the dosing of detergents and the adjustment of softening systems to the prevention of limescale deposits in pipes, boilers and industrial systems.

Hardness measurement is particularly important for: Drinking water treatment, boiler water monitoring, aquaristics, swimming pools, the food industry and industrial processes.

How does the test set work?

The CALDUR® Total Hardness Test Set GH uses the proven complexometric titration method with EDTA (ethylenediaminetetraacetic acid). In this method, the calcium and magnesium ions are bound by EDTA, with a Reagent indicating the end point by a characteristic color change.

Measuring principle: 1 reagent is added to the water sample. When the titration solution is added drop by drop, the hardness constituents bind to the EDTA. The color change from red to green indicates that all hardness constituents are bound.

Calculation: Each drop of titration solution corresponds to 0.5 °dH (for 5 ml sample) or 0.25 °dH (for 10 ml sample). The number of drops multiplied by the drop value directly results in the total hardness in °dH.

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for routine checks on site – immediate results without waiting time

• High precision due to drop-by-drop titration

  Measured value per drop: 0.5 / 0.25 °dH – exact results thanks to proven complexometric method

• 100 at 5°dH Determinations per set

  Economical for regular household, commercial and industrial checks

• Clear color change from red to green

  Clear endpoint recognition – easy to read even for inexperienced users

• Flexible sample volume (5 ml or 10 ml)

  Higher accuracy with 10 ml sample due to halved drop value

• Robust, waterproof plastic housing with hinged lid

  Safe transportation and protection of reagents – durable even under harsh conditions

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

What is the total hardness measured for?

The total hardness of water is an important parameter for water quality and describes the sum of all alkaline earth ions, mainly calcium (Ca²⁺) and magnesium (Mg²⁺). These ions originate from the natural dissolution of rocks and minerals and have a significant influence on the properties of the water.

In Germany, water hardness is given in °dH (degrees of German hardness):

• 0-7 °dH: Soft water
• 7-14 °dH: Medium hard water
• 14-21 °dH: Hard water
• >21 °dH: Very hard water

Knowing the water hardness is crucial for many applications: from the dosing of detergents and the adjustment of softening systems to the prevention of limescale deposits in pipes, boilers and industrial systems.

Hardness measurement is particularly important for: Drinking water treatment, boiler water monitoring, aquaristics, swimming pools, the food industry and industrial processes.

How does the test set work?

The CALDUR® Total Hardness Test Set GHT 100 uses the proven complexometric titration method with EDTA (ethylenediaminetetraacetic acid). In this method, the calcium and magnesium ions are bound by EDTA, with a Reagent indicating the end point by a characteristic color change.

Measuring principle: 2 reagents (Reagent and titration solution) are added to the water sample. When the titration solution is added drop by drop, the hardness constituents bind to the EDTA. The color change from red to green indicates that all hardness constituents are bound.

Calculation: Each drop of titration solution corresponds to 1.0 °dH (for 5 ml sample) or 0.5 °dH (for 10 ml sample). The number of drops multiplied by the drop value directly results in the total hardness in °dH.

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for routine checks on site – immediate results without waiting time

• High precision due to drop-by-drop titration

  Measured value per drop: 1.0 / 0.5 °dH – exact results thanks to proven complexometric method

• 100 at 10°dH Determinations per set

  Economical for regular household, commercial and industrial checks

• Clear color change from red to green

  Clear endpoint recognition – easy to read even for inexperienced users

• Flexible sample volume (5 ml or 10 ml)

  Higher accuracy with 10 ml sample due to halved drop value

• Robust, waterproof plastic housing with hinged lid

  Safe transportation and protection of reagents – durable even under harsh conditions

Der Beitrag Caldur® Total hardness GHT 100 – Titration erschien zuerst auf RLS Wacon analytics.

What is residual hardness measured for?

Residual hardness is a decisive parameter when monitoring water softeners and
ion exchangers. After water softening, it must be ensured that the hardness formers
(calcium and magnesium) have been removed as far as possible in order to avoid limescale deposits in downstream
systems.

The RG 50 test set tests for a limit value of 0.5 °dH (5.0 mg/l CaCO₃).
This limit value is particularly relevant for heating systems.

Regular monitoring of the residual hardness is essential in order to recognize the exhaustion status of the
ion exchanger in good time and to initiate regeneration before hard water
enters the system.

How does the test set work?

The CALDUR® residual hardness RG 50 test set works according to the proven limit value method with a
color indicator. After adding a single drop of limit value indicator to the water sample,
the resulting color immediately indicates whether the residual hardness is above or below the limit value.

Green = residual hardness below 0.5 °dH – the water is sufficiently softened.
Red = residual hardness above 0.5 °dH – the ion exchanger must be regenerated.

This simple yes/no determination enables an extremely quick check without time-consuming
calculations or color comparisons.

Advantages of the CALDUR® test set

• Extremely fast analysis in just 1 minute

  Immediate detection of whether the limit value is exceeded or not reached – ideal for frequent checks

• Easy handling – only 1 drop required

  No drop counting, no calculation – color shows the result directly

• Limit value of 0.5 °dH

  Ideal for heating systems

• 250 provisions per set

  Particularly economical for regular routine checks

• Clear color change green/red

  Clear visual differentiation without room for interpretation

• Only one reagent required

  Minimal effort and no risk of confusion during implementation

• Robust hinged lid box or compact folding box

  Optimum protection of reagents – suitable for every application situation

Der Beitrag Caldur® residual hardness RG 50 – limit value erschien zuerst auf RLS Wacon analytics.

What is residual hardness measured for?

Residual hardness is a decisive parameter when monitoring water softeners and
ion exchangers. After water softening, it must be ensured that the hardness formers
(calcium and magnesium) have been removed as far as possible in order to avoid limescale deposits in downstream
systems.

The RG 5 test set tests for a limit value of 0.05 °dH (0.5 mg/l CaCO₃).
This limit value is particularly relevant for high-pressure steam boilers and ultrapure water.

Regular monitoring of the residual hardness is essential in order to recognize the exhaustion status of the
ion exchanger in good time and to initiate regeneration before hard water
enters the system.

How does the test set work?

The CALDUR® residual hardness RG 5 test set works according to the proven limit value method with a
color indicator. After adding a single drop of limit value indicator to the water sample,
the resulting color immediately indicates whether the residual hardness is above or below the limit value.

Green = residual hardness below 0.05 °dH – the water is sufficiently softened.
Red = residual hardness above 0.05 °dH – the ion exchanger must be regenerated.

This simple yes/no determination enables an extremely quick check without time-consuming
calculations or color comparisons.

Advantages of the CALDUR® test set

• Extremely fast analysis in just 1 minute

  Immediate detection of whether the limit value is exceeded or not reached – ideal for frequent checks

• Easy handling – only 1 drop required

  No drop counting, no calculation – color shows the result directly

• Limit value of 0.05 °dH

  Ideal for high-pressure steam boilers, ultrapure water

• 250 provisions per set

  Particularly economical for regular routine checks

• Clear color change green/red

  Clear visual differentiation without room for interpretation

• Only one reagent required

  Minimal effort and no risk of confusion during implementation

• Robust hinged lid box or compact folding box

  Optimum protection of reagents – suitable for every application situation

Der Beitrag Caldur® residual hardness RG 5 – limit value erschien zuerst auf RLS Wacon analytics.

What is residual hardness measured for?

Residual hardness is a decisive parameter when monitoring water softeners and
ion exchangers. After water softening, it must be ensured that the hardness formers
(calcium and magnesium) have been removed as far as possible in order to avoid limescale deposits in downstream
systems.

The RG 10 F test set tests for a limit value of 0.1 °fH (French degrees of hardness).
This limit value corresponds to approx. 0.056 °dH and is particularly relevant for international applications,
where the French hardness scale is used.

Regular monitoring of the residual hardness is essential in order to recognize the exhaustion status of the
ion exchanger in good time and to initiate regeneration before hard water
enters the system.

How does the test set work?

The CALDUR® residual hardness RG 10 F test set works according to the proven limit value method with a
color indicator. After adding a single drop of limit value indicator to the water sample,
the resulting color immediately indicates whether the residual hardness is above or below the limit value.

Green = residual hardness below 0.1 °fH – the water is sufficiently softened.
Red = residual hardness above 0.1 °fH – the ion exchanger must be regenerated.

This simple yes/no determination enables an extremely quick check without time-consuming
calculations or color comparisons.

Advantages of the CALDUR® test set

• Extremely fast analysis in just 1 minute

  Immediate detection of whether the limit value is exceeded or not reached – ideal for frequent checks

• Easy handling – only 1 drop required

  No drop counting, no calculation – color shows the result directly

• Limit value of 0.1 °fH (French degrees of hardness)

  International scale for cross-border applications

• 250 provisions per set

  Particularly economical for regular routine checks

• Clear color change green/red

  Clear visual differentiation without room for interpretation

Der Beitrag Caldur® residual hardness RG 10 F – limit value erschien zuerst auf RLS Wacon analytics.

What is residual hardness measured for?

Residual hardness is a decisive parameter when monitoring water softeners and
ion exchangers. After water softening, it must be ensured that the hardness formers
(calcium and magnesium) have been removed as far as possible in order to avoid limescale deposits in downstream
systems.

The RG 10 test set tests for a limit value of 0.1 °dH (1.0 mg/l CaCO₃).
This limit value is particularly relevant for medium-pressure steam boilers.

Regular monitoring of the residual hardness is essential in order to recognize the exhaustion status of the
ion exchanger in good time and to initiate regeneration before hard water
enters the system.

How does the test set work?

The CALDUR® residual hardness RG 10 test set works according to the proven limit value method with a
color indicator. After adding a single drop of limit value indicator to the water sample,
the resulting color immediately indicates whether the residual hardness is above or below the limit value.

Green = residual hardness below 0.1 °dH – the water is sufficiently softened.
Red = residual hardness above 0.1 °dH – the ion exchanger must be regenerated.

This simple yes/no determination enables an extremely quick check without time-consuming
calculations or color comparisons.

Advantages of the CALDUR® test set

• Extremely fast analysis in just 1 minute

  Immediate detection of whether the limit value is exceeded or not reached – ideal for frequent checks

• Easy handling – only 1 drop required

  No drop counting, no calculation – color shows the result directly

• Limit value of 0.1 °dH

  Ideal for medium-pressure steam boilers

• 250 provisions per set

  Particularly economical for regular routine checks

• Clear color change green/red

  Clear visual differentiation without room for interpretation

• Only one reagent required

  Minimal effort and no risk of confusion during implementation

• Robust hinged lid box or compact folding box

  Optimum protection of reagents – suitable for every application situation

Der Beitrag Caldur® residual hardness RG 10 – limit value 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 the total hardness measured for?

The total hardness of water is an important parameter for water quality and describes the sum of all alkaline earth ions, mainly calcium (Ca²⁺) and magnesium (Mg²⁺). These ions originate from the natural dissolution of rocks and minerals and have a significant influence on the properties of the water.

In Germany, water hardness is given in °dH (degrees of German hardness):

• 0-7 °dH: Soft water
• 7-14 °dH: Medium hard water
• 14-21 °dH: Hard water
• >21 °dH: Very hard water

Knowing the water hardness is crucial for many applications: from the dosing of detergents and the adjustment of softening systems to the prevention of limescale deposits in pipes, boilers and industrial systems.

Hardness measurement is particularly important for: Drinking water treatment, boiler water monitoring, aquaristics, swimming pools, the food industry and industrial processes.

How does the test set work?

The CALDUR® Total Hardness Test Set GH 100 uses the proven complexometric titration method with EDTA (ethylenediaminetetraacetic acid). In this method, the calcium and magnesium ions are bound by EDTA, with a Reagent indicating the end point by a characteristic color change.

Measuring principle: 1 reagent is added to the water sample. When the titration solution is added drop by drop, the hardness constituents bind to the EDTA. The color change from red to green indicates that all hardness constituents are bound.

Calculation: Each drop of titration solution corresponds to 1.0 °dH (for 5 ml sample) or 0.5 °dH (for 10 ml sample). The number of drops multiplied by the drop value directly results in the total hardness in °dH.

Advantages of the CALDUR® test set

• Quick analysis in just 1 minute

  Ideal for routine checks on site – immediate results without waiting time

• High precision due to drop-by-drop titration

  Measured value per drop: 1.0 / 0.5 °dH – exact results thanks to proven complexometric method

• 100 at 10°dH Determinations per set

  Economical for regular household, commercial and industrial checks

• Clear color change from red to green

  Clear endpoint recognition – easy to read even for inexperienced users

• Flexible sample volume (5 ml or 10 ml)

  Higher accuracy with 10 ml sample due to halved drop value

• Robust, waterproof plastic housing with hinged lid

  Safe transportation and protection of reagents – durable even under harsh conditions

Der Beitrag Caldur® Total hardness GH 100 – Titration erschien zuerst auf RLS Wacon analytics.