CALDUR comprises test kits for the manual determination of water constituents. In addition to many standard rapid tests for checking residual hardness, total hardness, chlorine content and iron concentration, the CALDUR range also includes many test kits that are required for niche applications. All products in the CALDUR series are characterized in particular by their ease of use and very precise measurement point determination.

The test sets of the CALDUR scientific series are characterized by particularly easy handling and extremely high accuracy, which cannot be achieved with conventional manual test kits. This is achieved by dosing via a syringe, on the scale of which the measured value can be read directly - instead of counting drops.