Cracks, take the right measures
146,20€ w/o VAT per box 10 units
Made in France
Table of contents
In order to most effectively measure the evolution of the crack, the gauge is usually attached at the widest point of the crack or in the middle of the crack. The G1+ gauge is made of a material that is flexible enough to accommodate and follow the movement of irregular, convex or concave surfaces.
There are two possible methods of fixing:
Result of fixing with anchors and screws:
Ideally, position the vernier triangle between 33 and 34 with the two speckled bands appearing on the right and left. The objective is to centre the pull tab. The principle consists in measuring the difference between 2 measurements: it does not matter the value of the first measurement, it is it which will constitute the 0 point.
Position the pin of the folding bar in the middle of the slotted hold to absorb any movement.
It is possible to fix the gauge in angle : G1 family gauges are supplied with a foldable plastic angle bar.
We recommend that gauges used in public places (schools, shops, streets) should be protected.
The major innovation provided by the G1+ gauge resides in its “digital” readout of tenths of mm: indeed, each 1/10 mm movement of the pull tab causes the concomitant obstruction of a row of 6 white lights placed on this same tab. Each row is assigned to a digit (0 to 9) corresponding to the tenths of mm.
By subtracting the first from the second reading, we can infer that the crack has grown by 0.55 mm in a little more than 3 months.
The vernier, located on the top of the pull tab, will confirm these results if necessary (for instructions on reading the vernier, see the G1 gauge product sheet)
In order to facilitate the monitoring of the evolution of the cracks, you can download the Excel file for monitoring the G1+ measurements
This Excel file is very easy to use: you just have to duplicate a sheet for each site or construction site observed with the possibility to follow up to 10 gauges.
Note that the impact of the expansion coefficient on the G1 gauge measurement is very small (about 9 micrometers every 1°C).
Here is an example of the type of monitoring obtained with the file:
For inside and outside : weather-resistant. Accurate to 1/10th of a mm.
For interior use only, particularly in dry rooms. Accurate to 1/10th of a mm.
Transparent for interior and exterior quality structures. Accurate to 1/10th of a mm.
Protection with anti-UV filter for G1 gauges fixed outside (delivered with impact anchors)
Protection for G1 gauges fixed in the public places (delivered with impact anchors).
Glue rapid hardening in twin syringe
Kit for mechanical fixing to the structure wherever the condition of its surface does not allow the use of self-adhesive tabs (1 drill + 1 screwdriver + 30 impact anchors)
Impact anchors pack for mechanical fixing to the structure wherever the condition of its surface does not allow the use of self-adhesive tabs (pack of 50 units)
For measuring the variation in a crack in a vertical or horizontal internal angle (with self-adhesive tabs and 1 impact anchor).