Open black plastic carrying case with foam interior holding a KRL BOX test kit. Visible items include a round blue-labeled container marked 'KRL BOX', a small jar labeled 'WOLFF KRL BOX TEST FLUID', two plastic funnels, a wooden-handled mallet, a flat chisel or scraper with an orange handle, a small bristle brush, and custom-cut foam compartments. The lid is lined with egg-crate foam and the lower tray is precision-cut to secure each tool, suggesting a professional leak-testing or inspection kit.

Two black plastic tool cases labeled 'WOLFF KRL BOX PREMIUM' and 'WOLFF KRL BOX BASIC' sit side by side on a light concrete floor. In front of them is a neat row of tools and accessories: a paintbrush, a flat chisel, a hammer with a wooden handle, a round black container labeled 'KRL BOX', a small black cup, a small jar, a black mixing funnel and a clear plastic bag. The scene is evenly lit and presented in a minimalist product-style arrangement.

Close-up of a construction worker kneeling on a dusty concrete floor, wearing black protective gloves and holding a hammer and chisel to chip away concrete. Small rubble and dust surround the work area; the image focuses on the hands, tools and the immediate floor surface.

Close-up of a person kneeling on a light-colored floor, wearing black work gloves and gray work pants, scooping gray dusty rubble and small chunks with a spoon into a clear resealable plastic bag; a small pile of powder and fragments lies in the foreground. The hands and tools are sharply focused while the person's torso is blurred, suggesting construction or renovation work.

Close-up of a construction worker's hands wearing black protective gloves, using a small hammer with a wooden handle to crush or compact light-colored crushed concrete inside a clear plastic bag on a dusty floor. The worker kneels in work trousers and a blue safety shoe is partially visible; a drilled hole and scattered dust and small debris lie on the surrounding floor. The composition emphasizes the hands, the hammer and the granular material, with a soft, neutral color palette and a worksite atmosphere.

Close-up of a worker's hand wearing a bright yellow-green safety glove labeled 'STRONG' placing a black plastic component onto another black plastic part on a light concrete floor. The worker is kneeling; a partially blurred bag of anchors and a tool case are visible in the background, along with a shoe with green laces. The scene is well-lit with a shallow depth of field, focusing on the gloved hand and the two plastic pieces during assembly or installation.

A construction worker kneels on a dusty concrete floor, wearing bright neon-yellow protective gloves and black work shoes with green accents. An open hard plastic case with foam inserts holds a round blue-labeled canister marked 'KRL BOX', a small container, and a paintbrush; nearby are a plastic bag with crushed concrete, a drilled circular hole in the floor, a small black mold partially filled with aggregate, and a circular tool lid dusted with powder. The worker's gloved hand is placing or adjusting the lid or scoop over the filled mold, indicating preparatory work for taking a concrete sample or performing a repair. The scene shows fine dust, neatly arranged tools, and a focus on hands-on, detail-oriented site work.

Wolff KRL Box Premium Set

The WOLFF KRL Box enables quick and precise moisture measurement in accordance with DIN 17668 and TKB Leaflet 18. The KRL value is displayed immediately via the app. This is ideal for digital moisture measurement and secure assessment of the readiness of substrates.

Properties

Quick Results Without Detours:
The WOLFF KRL Box is the smart solution for anyone who wants to carry out moisture measurement quickly, precisely, and directly on-site. Developed in close collaboration with UZIN, this innovative measuring device delivers reliable results in no time—without extensive preparation. The sensor transmits the exact KRL value directly to the associated app within minutes. This allows installers, site managers, or experts to immediately decide on-site whether the substrate is ready for covering or if further moisture barrier measures are necessary.
Easy Operation on the Construction Site:
Thanks to its intuitive handling, the KRL Box is particularly user-friendly and designed for daily use on construction sites. It significantly reduces the number of steps involved, as weighing, shaking, or chemical additives are not necessary. This saves valuable time and avoids potential sources of error in the measurement process.
Accurate Measurement Values, Digitally Documented:
The KRL Box complies with DIN 17668 and the current industry requirements according to TKB Leaflet 18 for moisture measurement, automatically documenting all measurements digitally in the app—complete with timestamps and project assignments. This makes providing evidence to clients, planners, or assessors a breeze.
Optimal System Solution for Residual Moisture:
Whether in new construction, renovation, or time-critical projects—complementing CM measurement, flooring professionals are well-equipped with the WOLFF KRL Box. If the measured moisture value is too high, UZIN’s perfectly coordinated system ensures safe moisture barrier measures—allowing for damage-free installation in the long term.
Efficiency Meets Precision:
The WOLFF KRL Box brings speed, safety, and digital precision to moisture measurement—an indispensable tool for modern construction sites.
Efficient and Cost-Saving Sensor Replacement:
The KRL measuring device for moisture measurement impresses with a particularly fast and easy sensor replacement—without the need for complicated calibration. Instead of spending time calibrating, the sensor can be easily replaced. This not only saves time but also reduces costs and significantly increases efficiency on the construction site.
Technical Specifications:

Operating Temperature: 5°C to 55°C
Relative Humidity Range: 5% to 95% relative humidity
Box Dimensions: Ø110 x 55 mm
Box Weight: 350g
Protocol: BLE 4.0
Power Supply: 4 AA Alkaline batteries
Languages: German/English/French/Dutch/Polish/Swedish/Spanish/Russian