Cost-effective, transparent polycarbonate gauge for visual monitoring of crack evolution in two or three dimensions.
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Cost-effective, transparent polycarbonate gauge for visual monitoring of crack evolution in two or three dimensions.
The Geolook Plastic Crack Meter is a simple, reliable, and low-cost device for monitoring the movement of cracks in concrete, brick, and masonry structures. Unlike electronic sensors, it requires no power or readout unit, providing an immediate visual indication of structural movement. Manufactured from heavy-duty, UV-resistant polycarbonate, it is designed to withstand outdoor weathering without yellowing or becoming brittle. It consists of two overlapping plates—one with a calibrated grid and the other with crosshairs—that move relative to each other as the crack widens or shears.
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The Plastic Crack Meter functions on a simple principle of relative motion. It comprises two transparent plates. The bottom plate, printed with a calibrated millimeter grid, is fixed to one side of the crack. The top plate, marked with a red crosshair cursor, is fixed to the other side.
As the crack opens, closes, or shears, the top plate moves over the bottom one. The position of the crosshair on the underlying grid indicates exactly how much movement has occurred in both the X (opening) and Y (shearing) directions.
Installation is rapid and non-intrusive. For most masonry or concrete surfaces, a fast-setting 2-part structural epoxy is recommended. The gauge is supplied with temporary alignment pins that hold the two plates in the 'zero' position while the glue sets.
Once the adhesive cures, the alignment pins are removed (or tape cut), allowing the plates to move freely. For rough surfaces or long-term installations, screws and wall plugs can be used via the pre-drilled mounting holes.
We offer two primary configurations to suit different structural locations:
While electronic sensors offer remote data, Plastic Crack Meters are unbeatable for simplicity and cost. They allow engineers to instrument dozens of cracks in a building for the price of a single electronic sensor.
They are ideal for 'triage' situations—determining which cracks are active and dangerous versus those that are dormant—before committing to a more expensive automated monitoring system.
The Plastic Crack Meter functions on a simple principle of relative motion. It comprises two transparent plates. The bottom plate, printed with a calibrated millimeter grid, is fixed to one side of the crack. The top plate, marked with a red crosshair cursor, is fixed to the other side.
As the crack opens, closes, or shears, the top plate moves over the bottom one. The position of the crosshair on the underlying grid indicates exactly how much movement has occurred in both the X (opening) and Y (shearing) directions.
We offer two primary configurations to suit different structural locations:
Installation is rapid and non-intrusive. For most masonry or concrete surfaces, a fast-setting 2-part structural epoxy is recommended. The gauge is supplied with temporary alignment pins that hold the two plates in the 'zero' position while the glue sets.
Once the adhesive cures, the alignment pins are removed (or tape cut), allowing the plates to move freely. For rough surfaces or long-term installations, screws and wall plugs can be used via the pre-drilled mounting holes.
While electronic sensors offer remote data, Plastic Crack Meters are unbeatable for simplicity and cost. They allow engineers to instrument dozens of cracks in a building for the price of a single electronic sensor.
They are ideal for 'triage' situations—determining which cracks are active and dangerous versus those that are dormant—before committing to a more expensive automated monitoring system.
We are currently updating the specific model configurations and technical datasheets for this product category.