CALDUR® Total hardness – Scientific
Determination of total hardness in water by spray titration
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for CALDUR® Total hardness – Scientific:
See also:
CALDUR® Total Hardness Scientific Test Set – Syringe titration
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
Areas of application
Carrying out the measurement:
- Fill water sample into test tube
- Add reagent A (buffer) and mix
- Add reagent B (Reagent) – solution turns red
- Fill dosing syringe with titration solution
- Slowly add titration solution while swirling until the color changes to green
- Read the measured value directly from the syringe scale
Tip for best results
The Scientific method allows continuous reading. Slowly add the titration solution to
and observe the color change closely. Intermediate values can be read off precisely.
Measuring range
| Unit | Measuring range | Measuring resolution |
|---|---|---|
| °dH | 0 – 20 °dH | Stepless |
| °fH | 0 – 20 °fH | Stepless |
| ppm | 0 – 200 ppm | Stepless |
Number of possible provisions
You can carry out approx. 200 measurements with a CALDUR® Total Hardness Scientific test kit.
Specifications at a glance
| Property | Value |
|---|---|
| Parameters | Total hardness (Ca²⁺ + Mg²⁺) |
| Method | Scientific (syringe titration) |
| Measuring range | 0 – 20 °dH / 0 – 20 °fH / 0 – 200 ppm |
| Analysis duration | 1 minute |
| Number of provisions | approx. 200 |
| Description: Syringe | Syringe, test tube, 2 reagents |
| Packaging | Plastic box |
Scope of delivery
| Dosing syringe | 60 ml with scale |
| Titration solution | 60 ml (shelf life 60M) |
| Indicator solution | 10 ml (shelf life 36M) |
| Test tubes | With markings |
| Operating instructions | DE/EN |
Additional information
| Unit | °dH, °fH, ppm |
|---|---|
| Product category | Testset |
Flyer
Operating instructions
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