Water Analytics
From manual on-site determination to continuous online monitoring – RLS Wacon covers the complete field of water analytics: CALDUR® test sets, SYCON online analyzers and LIMES hardness control. Developed and manufactured in Germany.
Which product do I need?
Describe your application, assemble your device – or convert your water hardness.
Welches Produkt brauche ich?
Lieber selbst stöbern? — alle CALDUR®-Testsets (manuelle Analyse): 29 Parameter × Methoden
| Parameter | Grenzwert | Titration | Scientific | Kolorimetrisch | Photometrisch |
|---|
Analysegerät zusammenstellen
In wenigen Schritten zum kompletten Set – Gerät, Indikator, Zubehör und Wartung, direkt in Ihre Anfrageliste.
Results without warranty · The scale follows the common mg/L CaCO₃ classification (for orientation).
Total hardness
The sum of calcium and magnesium ions — the key value against limescale.
- Definition
- Total hardness is the sum of the dissolved calcium and magnesium ions. It is stated in °dH, ppm CaCO₃ (mg/L) or grains per gallon (gpg): 1 °dH = 17.8 ppm CaCO₃ = 1.04 gpg.
- Why it matters
- Hardness is the key value for scale protection: on heating, calcium carbonate precipitates as limescale in boilers, heat exchangers, tanks and pipes, lowering efficiency and raising energy and maintenance costs.
- Where measured
- At the inlet (raw-water hardness), downstream of the softener (residual-hardness check) and continuously in boiler and cooling water.
- Typical values
- Tap water ranges roughly 60–400 ppm CaCO₃ (soft to very hard). Softened boiler feed water should reach a residual hardness near 0.
- Measurement
- Drop-by-drop titration, pass/fail limit test or continuous online analysis (SYCON / LIMES).
- Good to know
- Carbonate hardness is the part of total hardness that precipitates on heating — both values are usually considered together.
The right solution for every application
CALDUR® test sets
Test sets, test strips and handheld meters for fast on-site determination – over 60 test sets for 29 parameters, in five methods.
To manual analysis
SYCON analyzers
Automatic, continuous monitoring of water hardness, p-value, silica and iron – around the clock, with interfaces for process control systems.
To online analysis
LIMES
Online monitoring of water hardness in the BASE & PLUS variants – reliable, low-maintenance and easy to integrate.
To LIMESFrom idea to product – everything from a single source.
Development, electronics, formulations, assembly and testing have all been carried out at a single site in Hildesheim since 1975.
Development
Our own team for devices, reagents and measurement methods.
Electronics & reagents
Circuit boards and CALDUR® reagents from our own production.
Manufacturing
Assembly, filling and packaging in-house.
Quality testing
Every device and every batch is tested before delivery.
Our partner network
20+ partners around the world – we develop and manufacture in Germany and deliver internationally.
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