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Equipment tagged with [joint movement]

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<p>In late 2009 the U.S. Geological Survey (USGS) and National Park Service (NPS) joined into a collaborative research project to investigate the deformation of large, vertically-oriented, granite slabs in response to thermal heating and solar radiation. The ...
<p>The Model 4415 3-Dimensional Crackmeter is a simple and rugged instrument designed to manually measure the displacement across cracks and/or expansion joints in three directions.<br><br>Mechanical Range 0-12.5 mm, in each X, Y, Z axis <br>Distance Between ...
The Model 4420 Crackmeter is intended to measure movement across surface cracks and joints. It is installed by grouting, bolting, or bonding two threaded anchors (with ball joints) on opposite sides of the crack and then attaching the ends of the gage to the ...
The Model 4400 Embedment Jointmeter is designed for use across construction joints such as those between adjacent blocks in a concrete dam. It is normally embedded across the joint to monitor the expansion or contraction of the joint. The use of internal universal ...
<p>The JM utilizes a vibrating wire sensor attached to a spring tensioned between two anchors. Any variation of distance between these anchors will change the tension in the wire. The sensor is protected by a sliding stainless steel housing.</p><p>3 models ...
The Model 4427 Long Range Displacement Meter is ideally suited for the measurement of large displacements associated with landslides. The Model 4427 can also be used for monitoring the movement of boulders, snow, etc., on unstable slopes.<br><br><b>Specifications</b>:<br>Standard ...
<p>The Mechanical Triaxial Jointmeter is designed to monitor three way displacement (X, Y and Z) across joints or cracks between adjoining concrete and rock structures. The Jointmeter comprises two elements; a zinc coated measurement arm and a Stainless Steel ...
The Model 4422 is a miniature crackmeter intended to measure displacements across surface cracks and joints. It has been specially designed for applications where access is limited and/or where monitoring instrumentation is to be as unobtrusive as possible ...
<p>The RTF surface jointmeter (also crackmeter or fissurometer) is designed to monitor relative movements of adjacent surfaces across cracks or construction joints.</p><p>The RTF surface jointmeter consists of a vibrating wire transducer or a potentiometer, ...
<p>Tell-Tales consist of two plates which overlap for part of their length. One plate is calibrated in millimeters and the overlapping plate is transparent and marked with a hairline cursor. As the crack width opens or closes, one plate moves relative<br>to ...