Monitoring crack widths in concrete buildings, bridges, and roads is easy and reliable with Gilson Concrete Crack Monitors. The overlapping upper plate is transparent and marked with a red crosshair cursor. The white bottom plate measuring grid is marked in millimeters. Opening and closing of the crack is monitored in 1mm increments. Monitors are affixed with user-supplied screws and adhesive.
HM-634 Crack Monitor is vandal-resistant clear polycarbonate with a range of 25mm horizontally and 10mm vertically. Adjustment slots for screws ensure secure placement. After affixing, temporary pegs are removed so plates move independently. Spigots on both plates enable exact measurement to 0.1mm with calipers. (Gilson recommends TSA-271 Digital Caliper.) A second Crack Monitor may be positioned for monitoring in three dimensions.
HM-635 Corner Adapter enables Crack Monitors to be used in corners with greater or less than 90° angles.
HM-637 Economy Crack Monitor is a simpler design with a range of 20mm horizontally and 10mm vertically. There are no spigots for use with calipers and the mounting holes are not slotted. Readability is 1mm.
HM-638 Displacement Monitor measures out-of-place movement across a crack, such as settling of a floor slab. It also measures opening and closing of the crack itself. Displacement range is 110mm. Horizontal range is -10-+50mm.
HM-636 Optional Crack Width Gauge assists those who survey and report on damaged buildings. This durable acrylic Gauge is scaled to measure cracks up to 7mm and wider in corners and awkward locations.
| Gilson Company, Inc. | |
|---|---|
| Product Category | Process Monitors |
| Product Number | HM-634 |
| Product Name | Concrete Crack Monitor |
