: Before every measurement session, you must "zero" the device. Hold the probe in the air away from any metal and press the reset or zero button.
To achieve reliable results and extend the lifespan of the device, follow these best practices:
is a non-destructive eddy-current device used to locate rebar and measure concrete cover.
Allows for the mapping of an entire reinforcement cage over a large area, providing a 2D image of the structure. Area Scan:
: Provides an estimated bar size, which is critical for structural assessments where original plans are missing. Operational Features Eddy Current Pulse Induction
For consistent, reliable measurements, it is recommended that the instrument be calibrated on a yearly basis. Always keep the housing clean by wiping off contamination with a moist, soft cloth; never use cleaning agents or solvents. Do not immerse the instrument in water or open the housing yourself.
If rebars are closer together than the cover depth, their magnetic fields overlap. This causes the instrument to underestimate the true cover depth. Use a spot probe in these zones.
To install the battery, remove the protective film and lift up the holder in the manner shown. Insert the battery and secure it with the screw. It is essential to charge the battery for 8 hours before the first use by connecting it to the power supply. During charging, the top LED will be red; it will switch to green when the battery is fully charged. A fast charger (part number 327 01 053) is available as an option to reduce the charging time to less than 5.5 hours.
Accurate concrete cover measurements depend entirely on proper zero-balancing and calibration before touching the concrete surface. Battery and System Check
Understanding the technical boundaries of the Profometer 4 ensures accurate field data collection.
If you find the Profometer 4 limited for your current projects, modern equivalents like the Profometer 600 offer: High-resolution color touchscreens. Internal memory for 2D cross-line scans.
: Standard AA batteries or a rechargeable battery pack. Probe Types
has long been recognized as a reliable, rugged, and accurate tool for assessing concrete structures . While newer models like the Profometer PM-8000 Go to product viewer dialog for this item. are available in 2026, the Profometer 4 Go to product viewer dialog for this item.
The Profometer 4 operates on the principle of electromagnetic induction. The search head contains a coil system driven by an alternating electrical current. The Eddy-Current Principle The coil generates a primary magnetic field.
View in portrait mode