Open black hard-shell carrying case with egg-crate foam in the lid and a custom-cut foam insert in the base holding a compact testing kit. Visible items include a round black container with a blue KRL BOX label, a small white jar labeled test fluid, two black plastic funnels/cones, a natural-bristle brush with a wooden handle, a wooden mallet, an orange flat scraper, and a small adhesive label showing batch and serial numbers. The components are neatly arranged and cushioned for transport and field use; the kit appears intended for sample preparation, application and testing of coatings or adhesives.

Two black plastic tool cases with teal-blue triangular labels reading 'WOLFF KRL BOX PREMIUM' and 'WOLFF KRL BOX BASIC' stand on a pale tiled floor. In front of them are arranged tools and accessories including a rubber mallet with a wooden handle, a small paint brush, a chisel, a round container labeled 'KRL BOX', a small jar, a plastic funnel, a black cylindrical part and a clear resealable plastic bag. The scene is well-lit with a neutral, minimal background and the items are organized in a neat row for presentation.

Close-up view of a worker kneeling on a pale concrete floor while chiseling away old material. The image shows the worker's gloved hands gripping a chisel with a wooden handle and striking it with a small hammer to remove flakes of cement or plaster. The person's forearms are visible, wearing dark work gloves and gray work pants with dust marks; navy athletic shoes with white soles are partially visible. Fine dust and small rubble surround the chiseled area, and the soft even light emphasizes the textures of the concrete and tools. The shot conveys focused manual labor, renovation or repair work, and a careful, controlled technique.

Close-up of gloved hands collecting grey concrete dust and small rubble with a spoon and placing it into a small clear resealable plastic bag on the floor. The image focuses on the textured black work gloves and the powdery debris; a shallow pile and a small hole in the floor are visible, with the worker's bent knees blurred in the background. Neutral indoor lighting highlights the fine dust and rough fragments.

Close-up of a worker's gloved hands kneeling on a dusty concrete floor, using a small hammer to crush light-colored rubble on a plastic sheet beside a drilled hole; the worker wears dark gloves and blue sneakers.

Close-up of a worker's hand wearing a bright green and black work glove marked 'STRONG', holding a black plastic component above another matching plastic piece on a dusty concrete floor. The worker kneels in the background, partially out of focus; nearby are small building materials and a black plastic case. The scene suggests installation or assembly of construction or flooring parts in an indoor work environment.

A worker wearing neon green safety gloves arranges concrete repair tools and materials on a dusty floor: an open black foam-lined case with tins and a brush, a small bag of aggregate, a plastic measuring cup filled with gravel, and a drilled hole in the concrete.

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