It has gauge lengths of 50 to 2000 mm and a discrimination of only two microstrains on the 200mm gauge. This makes the DEMEC strain gauge ideal for strain measurement and crack monitoring on many different types of structures.
The DEMEC strain gauge consists of an invar main beam with two conical locating points, one fixed and the other pivoting on a special knife edge. The points sit in pre-drilled stainless steel discs which are attached to the structure with adhesive. The pivoting point’s movements are measured by the strain gauge which is attached to a base plate on the invar beam. Thermal movement within the instrument is negligible.
With practice, 200 strains per hour can be measured with accuracy of about ±5 x 10-6 under most laboratory test conditions. Even greater accuracy has been obtained using the gauge in its ideal horizontal position. In development tests of this kind 90 per cent of measured strains were within ±3 x 10-6 of the mean.
The digital version of the DEMEC strain gauge incorporates a digital indicator with a resolution of 0.001mm, zero set, preset and output for SPC. The indicator can be connected to a data processor for recording and analysis of results. The indicator displays spindle movement digitally by means of a linear encoder and has a response speed of 1000 mm per second. The digital DEMEC is battery operable.
DEMEC strain gauges come complete with an invar reference bar, for control measurements, and a setting out bar for accurate positioning of locating discs.
Bestech Australia | Measurement Equipment & Technical Training Systems
Bestech Australia was founded in 2002 in Melbourne and is now one of the fastest growing companies in Australia and New Zealand, distributing and manufacturing sensors, transducers, signal conditioners and test systems for measurement of physical parameters like Leak, Displacement, Tilt, Pressure, Temperature, Strain, Force, Torque, Vibration, Viscosity, Level, Flow, and Material Properties. Bestech Australia also carries a full range of technical teaching equipment and programmes for electrical/electronics, civil, mechanical and chemical engineering as well as automotive and avionics training.
Bestech Australia supplies state of the art instruments from world leading manufacturers, and provides quality customer service. Bestech delivers a wide range of products for university and research laboratories as well as various applications in manufacturing, military, mining, steel, rail, construction, automotive, chemical, pharmaceutical, food and water industries.
In addition, Bestech Australia has well trained engineers to provide advice and guidance on specific applications and products selection. We offer full support including repair, maintenance and calibration.