Factors To Remember When Selecting A Strain Gauge

When it comes to measurement & test applications, the overall mechanical properties of a specific material is exceptionally crucial in obtaining the relevant results. The mechanical properties also provide the base for any mechanical uncertainties that might be present while performing the required experiment. It should be realized that in any mechanical testing procedure, strain measurement is always essential. As of the current day & age, there are multiple methods through which strain can be tested - both mechanically & electrically. Moreover, one of the significant reasons why strain gauges have become much popular is because of their low-cost combined with high accuracy - enabling them to be used in a multitude of different applications. With that being said, let's look at some of the best factors to keep in mind when selecting a strain gauge transducer.

Factors To Look Into When Purchasing A Strain Gauge

The Construction It should be realized that there is a multitude of different strain gauge geometries that are available in terms of grid shape, orientation, positioning and number. Some of the designs include T-rosette, double linear, full-bridge, linear and so on. Therefore, you can choose your desired construction as per your requirements. You should remember that the construction of the strain gauge should be able to complement your entire experiment - without affecting its accuracy or results. Times like these are when you need to take help from professionals, who have been in this business for quite some time now. The Length Of The Gauge Unless you're new at selecting a strain gauge, you should learn that the overall gauge length of a strain gauge indeed has a major impact on the overall measurement of the strain. So, you have to be pretty self-confident about the gauge length you're selecting because the experiment you're planning to undertake can produce varying results if such factors are not considered. The Resistance Of The Gauge Each strain gauge comes with its desired electrical resistance rating that you cannot ignore, as it will be affecting the final result of your experiment or measurement. Some of the resistance examples are of 60 ohms, 120 ohms or even up to 350 ohms & more. Strain gauges having higher resistances are known to be high-resistance strain gauges and vice-versa. Furthermore, you must remember that the gauge’s resistance also depends on the size of the gauge, it’s cost and the grid it is using - ultimately affecting the overall performance. As a rule of thumb, it's perpetually a better idea to go with a strain gauge that comes with a resistance rating that lingers between 350 ohms and 1,000 ohms. However, higher resistance strain gauges also require more power to drive.