I also use scales laid across the crack and macrophotography for documentation. Our selection of monitoring and recording devices offers a range of configurations for the precise measurement of vertical and horizontal cracking. I find when used with a magnifying glass, it is quite easy to make an exact detemination of the crack width. Read this first: This simple crack width ruler has been designed to provide inspectors with a low cost alternative to a graduated microscope for determining the width of a crack in concrete or other building materials. Save crack images quickly with the snapshot button; 5. The Gilson Crack Monitoring Record Sheet is a helpful tool to use to monitor movement in crack width over time. This device measures differential movement, as well as opening and closing of the crack.
To discuss your specific needs please. About 16% of these are pressure gauges, 3% are gauges. Join your peers on the Internet's largest technical engineering professional community. The upper plate is transparent and marked with a red crosshair indicator. Reactivity Test Kit for Slab Surfaces. About product and suppliers: Alibaba.
And I use the double business card trick that was described in Structure Magazine. Crack Measuring Device Digital Positon Strain Gauge Deformation Meter The Digital Position Strain Gauge Deformation Meter shown here consists of a digital dial gauge attached to a bar. The geotechniocal engineer is saying the way to do it should be by demec gauges. I could not find the information of the tolerance in gauge length. The user tries lining up the different line widths with the crack. Crack Detection Microscope Magnification X 40 Measuring Range of 4mm In 0.
If you , please include the following information to speed up the process: your company name and contact information, logo, order quantity, delivery deadline, and specific needs. We are also able to provide any other cm or inch scales required. Therefore, it is nearly impossible to get accurate readings with feeler gauges when measuring concrete cracking. It contains a scale at the bottom for measuring and has plenty of room for your logo, sales and contact information. Or simply, can a 100 mm Demec gauge be used to measure a gauge length of 95 mm or 105 mm? When it comes to selling in stock products, we are no difference from many other Internet retailers, but we take pride in going extra miles to do something special for you: Have some products custom made for you. If you have questions or need help selecting equipment, please call us at 1. Also concerned a little that vandals can remove the Avongard so don't want to rely totally on it.
Looks like great minds think alike. Recently I met with an engineer on site after his reported crack width measurewments were generally twice what ours were when we measured the same crack at the same location along the crack; I found that he was using an electronic digital calipers to measure the crack widths, by holding it flat against the wall and adjusting it until it appeared that the gap between the prongs of the calipers was to equal the crack width. Price Include: 1 color;2 sides;1 location Concrete crack gauge 10 cm. Q: Do you provide samples 9 is it free or extra 9 A: Yes, we could offer the sample for free charge but do not pay the cost of freight. It works well in corners and awkward areas. We main focus on running of instruments, main cover ultrasonic flow meter, ultrasonic level meter, ultrasonic water meter, electromagnetic, turbine, vortex, oval gear flow meter, radar Level meter and other series industry instruments. Powered by two c-cell batteries this model can be used in those poorly lit areas where the natural light is dim or non-existent.
Crack widths also vary with length and depth. A fixed conical point is mounted at one end of the bar, and a moving conical point is mounted on a knife edge pivot at the opposite end. With a magnification of 50 times this microscope can be used to accurately measure the width of cracks and also combines a calibrated focusing ring allow the depth of cracks to also be accurately measured. While evaluating a concrete structure, accurate determination of crack widths will help in identifying the possible causes and, if needed, repair methods for cracks. There are also matched fast connection, nylon hose, instrument connector etc, used to connect the calibrated instrument and the standard gauge. A wide variety of crack gauge options are available to you, such as free samples, paid samples.
It is easy to use in the field by moving the graduated transparent plastic card along the length of the crack, estimating the possible varying widths as you compare against the different widths of the graduated lines on the card and averaging the readings as a good practical value of the crack width for decision making. A setting out bar is used to position pre-drilled discs which are attached to the structure using a suitable adhesive. We are currently monitoring about 20 cracks, but likley we can eventually concentrate on about 6 of them. Cracks in concrete structures, roads, buildings or bridges can signal underlying problems and should be monitored to avoid serious functionality or stability issues. Scale testing method, it is convenient to detect the same crack several times and compare the testing data 3. This version features inches and centimeters. About product and suppliers: Alibaba.
Measuring and monitoring crack width in concrete and masonry elements is simple and reliable with Gilson Concrete Crack Monitors. Will you help me about that? Standard probe and high grade probe; 4. There are 1,558 crack gauge suppliers, mainly located in Asia. A flat object, such as a feeler gauge, would get hung up on the irregularities. The image data can be saved automatically. This works well for short term monitoring weeks, not months or years. It's a lot cheaper than buying crack gauges.
Let us help with your needs of custom production, large or small. A high quality of service represents a competitive advantage for civil engineers that can gain client fidelity and more, but this is becoming harder to accomplish with modern design expectations. What we can accomplish may surprise you! This transparent template utilizes printed lines in a variety of widths to measure cracks in manufactured products and can be used as a go, no go sorter. Dust Control Grinding Tools for Concrete Slabs. Comparator gauge products are most popular in North America, South America, and Mid East.
Select from a basic, digital essentials or digital professional kit. To use, position the gauge over the crack and identify which line is a similar width to the crack. Auto Flash Terminals You can connect the test leads according to auto flash prompt in order to avoid the misoperation. Buildera manufactures the gauge from flexible 30-mil polyethylene that has been modified to ensure high clarity and bending strength without snapping. Price Include: 1 color;1 side;1 location Concrete crack gauge 4''. Field Microscope The field microscope is a small sized lightweight and conveniently portable microscope. This durable unit provides on-the-spot measurements of cracks up to 7mm.