Adhesive Mounting By: Ronald Nelson August 07, 2015, 0 Comments
Previously, we looked at stud mounting, the time-consuming but best result yielding of the three types of mounting methods.
Adhesive mounting is generally used for temporary installation or when the surface cannot be adequately prepared for stud mounting. Adhesives like hot glue and wax work well for temporary mounts; two-part epoxies and quick bonding gels (super glue) provide a more permanent mount. Adhesively mounted sensors often exhibit a reduction in high-frequency range. Generally, smooth surfaces and stiff adhesives provide the best frequency response.
In the case that you decide that adhesive mounting is the best suited technique for your application caution should be exercised regarding the amount of the component used. During the initial mounting process be aware that excessive amounts of adhesive can make the sensor removal difficult. This can cause damage to the sensor, purely cosmetic in moderate cases, but can prove to be costly in more extreme cases. This can also cause a considerable amount of damage to the unit that the sensor is mounted to as well. Rarely should you ever bond directly to the accelerometer base. If you have to bond directly to the base, one trick is fill the mounting stud hole with mounting petrowax. Most often you should use a disposable mounting base which has: rings milled in the base for good adhesion, a threaded hole to securely connect to the transducer with a mounting stud, and an anodized or hard-coated surface which electrically isolates the accelerometer to avoid ground loops. However, too little adhesive will not create a cohesive joint for the sensor to stay mounted. Also, adhesive that may invade the tapped mounting hole in the base of the sensor will compromise future ability to stud-mount the unit. Thickness of the adhesive can also limit the frequency response of the accelerometer.
When choosing an adhesive is advised that it is first tested. When testing a adhesive it is best to do it on a hidden area of the structure, especially when concerned about the structure’s surface finish.
For a faster method of mounting the sensor, try magnetic mounting.
Need further explanation about a certain mounting technique? View our Mounting Guide.