KRL measuring cup for moisture measurement in screeds

KRL measuring cup for moisture measurement in screeds

The KRL measurement (from German: “Korrespondierende relative Luftfeuchte”) method is a modern technique for measuring moisture in screeds and other mineral building materials. Instead of determining the water content directly, it measures the corresponding relative air humidity (KRL) that develops above a screed sample. This allows the actual moisture content of the screed to be determined very accurately. It is also considered a more environmentally friendly method of moisture measurement and represents a sustainable alternative to CM measurement.

The measuring cup is manufactured specifically for Gann measuring devices and suitable electrodes. It forms a completely closed system into which the measuring sensor is inserted. Since no air exchange with the environment can take place when the sensor is inserted, this system enables extremely precise determination of the moisture content of the material being measured. The enclosed funnel makes it easier to fill the measuring material. This also prevents any measuring material from entering the sensor cage.
 

• Closed system → no air exchange
• Easy filling with funnel
• Two diameters to choose from → compatible with all Gann devices
• Quick assessment of readiness for covering
• Easy to use – measurement prepared in just a few minutes
• Robust design for daily use on construction sites
• Economical & reusable

Scope of delivery:

• Measuring cup
• Funnel
• 5 x bags for shredding the sample

Important questions about KRL measurement:

What is the KRL measurement method?

The KRL measurement method is a scientifically based procedure for measuring moisture in screeds. It works by placing a small screed sample in a measuring chamber. A moisture sensor then records the relative humidity emitted by the material. This measurement indicates exactly how moist the screed is – regardless of the type of screed (e.g. cement screed, calcium sulphate screed or concrete).

How does moisture measurement using the KRL method work?

1. Take a small screed sample
2. Place it in a closed measuring chamber
3. Measure the air humidity above the material
4. Evaluate after 30–60 minutes

This measurement corresponds to the natural equilibrium between the material and the ambient air – which is precisely why it is so accurate.

Why is moisture measurement in screed so important?

Before a floor covering can be laid, the screed must be sufficiently dry. Excess moisture can cause considerable damage, such as:

• Detachment of floor coverings
• Mould growth
• Deformations or bulging
• Long-term structural damage

The KRL measurement method enables a particularly reliable assessment of readiness for covering. It also indicates whether the screed absorbs or releases moisture – an important indicator for future development.

Who is the KRL measurement method suitable for?

The method is particularly suitable for:

• Floor layers
• Screed layers
• Site managers
• Experts
• Property developers
• Renovation contractors
• Private builders

Wherever reliable information on screed moisture is required, moisture measurement using the KRL method is the ideal choice.

Conclusion: KRL – The most precise moisture measurement for screeds
The KRL measurement method sets new standards in screed diagnostics. It is precise, fast, independent of the screed type and provides reliable information on readiness for covering. This makes it an increasingly important addition – and often a better alternative – to classic CM measurement.