Strain Sensors
Conventional strain sensors are based on strain gage technology. In order to effectively measure the strain values in a force or load measurement application, a full, 4 element strain gage bridge circuit is utilized. The configuration is known as a Wheatstone Bridge Circuit. A Wheatstone Bridge has a very linear output in it’s midrange. That being considered +100% to -100% of range. Unfortunately, a Wheatstone Bridge becomes non-linear above the upper and lower extremes of range. Therefore, significant errors can result above the end points when attempting to take precision measurements. It is particularly important to take accurate measurements in some R&D or control applications. To avoid the mentioned error issues, PCB manufactures quartz piezoelectric strain sensors that output the same mV/microstrain sensitivity throughout the entire useful range. Thus, accuracy is improved and control requirements are enhanced that may occur at positive extremes of the measurement range. The models RHM240 and model 740B02 series sensors are the strain sensors for these applications.
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Industrial ICP® Strain Sensors
For Process Monitoring/Quality Control. The Industrial ICP® Strain Sensors incorporate piezoelectric quartz sensing crystals that respond to a longitudinal change in distance. The resultant strain measurand is an indirect measurement of stress forces acting along the structure to which the sensor is mounted. As such, these devices can provide insight into the behavior of mechanical systems or processes that generate an associated machinery reaction.
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Reusable ICP® Strain Gauge
This high-resolution dynamic alternative to bond foil strain gauges uses a quartz sensing element in a durable, titanium housing. It has 0.0006 microstrain resolution, 5 volt output, 100k Hz frequency response and 0.5 gram mass for lightweight test articles. The reusable sensor comes with a calibration certificate, attaches to the test specimen in 60 seconds and is removed in 10 seconds.
