R.45I Sensor Very Low Frequency High Sensitivity Acoustic Emission Sensor Description and Features Operating Specifications The R.451 is a very low frequency and High sensitivity, internally amplified AE sensor with a 20 kHz resonance fre- 1 to 30 kHz. The sensor has a standard BNC connector on the side of the sensor. The cavity is made from Stainless steel. It is approximately 2.0” (50 mm) high. quency, 124 dB peak sensitivity and useful bandwidth from long cables without the need for a separate preamplifier. Completely shielded crystal for maximum RFI/EMI Incorporating a low-noise input, 40dB preamplifier and a filter all inside the sensor housing, these transducers are completely enclosed in metal stainless steel (or aluminum) housings that are treated to minimize RFI/EMI interference. Care has also been taken to thermally isolate the critical input stage of the preamplifier in order to provide excellent temperature stability over the range of -35º to 75º C. PAC’s integral preamp sensors were specifically engineered to attain high sensitivity and have the capability to drive Their integrated Auto Sensor Test (AST*) capability allows these sensors to pulse as well as receive. This feature lets you verify the sensor coupling and performance at any time before, during or after an AE test. This sensor is normally selected for structural health moni- toring of concrete and geologic structures. It is also a good Ordering Information and Accessories choice for pipeline leak detection. Frequency response of R.45I. Calibration based on ASTM E 1106 NIST Calibration Certificate & Warranty Due to continuing improvement, MISTRAS Group, Inc. reserves the right to amend specifications without notice. Copyright © 2010 MISTRAS Group, Inc. All Rights Reserved. Email: [email protected] www.mistrasgroup.com Products & Systems Division 195 Clarksville Road, Princeton Junction, NJ 08550 * AST -- Auto Sensor Testing feature allows AE systems to control the sensor as a pulser and a receiver at the same time. It can therefore characterize its own condition as well as send out a simulated acoustic emission wave that other sensors can detect, so the condition of the nearby sensors also can be tested.