The family of R.45I-LP-AST sensor is a low frequency, resonant, acoustic emission sensor with an integral, ultra-low noise, low power, filtered, 26dB or 12dB preamplifier, which can drive up to 250 meters of cable. This new sensor family represents an improvement in both noise and low power consumption performance, with noise level below 3 μV and power consumption of 25 mW. The sensors feature special polymer coatings making it 100% insulated and non-conductive. The 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 the test.