Isotron/ IEPE

Meggitt piezoelectric accelerometers are charge mode accelerometers that requires use of an external charge amplifier, allowing for reliable operation over wider temperature and amplitude ranges. Piezoelectric accelerometers are ideal choices for acceleration, shock and vibration measurements, due to their wide frequency range, easy installation, and multiple options in shapes, weights, size, and sensitivities. Special purpose piezoelectric accelerometers are also available for flight test, extreme low- and high-temperatures and radiation environments.Meggit Endevco® has successfully designed and manufactured shock accelerometers with built-in mechanical filter. This piezoelectric accelerometer features both an input mechanical filter and an electronic low-pass filter for sensor isolation and maximum bandwidth. Based on a well-established piezoelectric shock sensor, this accelerometer features a captive mechanical filter arrangement. Compared to the model of an external filter, this unique design provides mechanical isolation to the sensor (m) from all sides. High frequency energy, in the sensitive and transverse directions, is filtered by the isolation material, leaving the sensing element with only the pass-band signals. In addition, the transducer’s external housing keeps the entire assembly together in case of excessive shock input.Highlights for Piezoelectric accelerometers:
  • Extremely wide dynamic range, low output noise
  • Suitable for shock and vibration measurement
  • Excellent linearity over dynamic range
  • Acceleration signal can be integrated to provide velocity and displacement
  • Wide frequency range
  • Compact, non-contact design
  • Highly sensitive
  • Self-generating – no external power required
More product details, please click here or download practical understanding of accelerometer specifications
Model numberTypeTechnologySensitivity (mV@140dB SPL)Temp (C)Mounting
2250A-10Isotron accelerometers10-55 - 125Adhesive
2250AM1-10Isotron accelerometers10-55 - 125Adhesive
2255B-01Isotron accelerometers0.1-55 - 125Thread
2255B-1Isotron accelerometers1-55 - 125Thread
2256A-10ISOIsotron accelerometers10-67 - 257Thread
2256A-100Isotron accelerometers100-67 - 257Thread
2258A-10Isotron accelerometers10-55 - 125Thread
2258A-100Isotron accelerometers100-55 - 125Thread
2302-10Isotron accelerometers10-55 - 125No selection
2302-100Isotron accelerometers100-55 - 125No selection
2302-5Isotron accelerometers5-55 - 125No selection
2302-50Isotron accelerometers50-55 - 125No selection
2303Isotron accelerometers00 - 0No selection
2304Isotron accelerometers00 - 0No selection
2305Isotron accelerometers00 - 0No selection
256-10Isotron accelerometers10-55 - 125Adhesive
256-100Isotron accelerometers100-55 - 125Adhesive
256HX-10Isotron accelerometers10-55 - 125Thread
256HX-100Isotron accelerometers100-55 - 125Thread
258A-10ISOIsotron accelerometers10-54 - 125Thread
258A-100ISOIsotron accelerometers100-54 - 125Thread
25AIsotron accelerometers5-55 - 125Adhesive
25BIsotron accelerometers5-55 - 125Adhesive
27A11Isotron accelerometers10-55 - 125Adhesive
27A12Isotron accelerometers100-55 - 125Adhesive
27AM1-10Isotron accelerometers10-55 - 125Adhesive
27AM1-100Isotron accelerometers100-55 - 125Adhesive
35AIsotron accelerometers5-55 - 125Adhesive
5220B-100Isotron accelerometers100-50 - 125Thread
61C12Isotron accelerometers100-25 - 125Adhesive
61C13Isotron accelerometers1000-25 - 125Adhesive
65-10Isotron accelerometers10-55 - 125Thread
65-100Isotron accelerometers100-55 - 125Thread
65HT-05Isotron accelerometers00 - 0Adhesive
65HT-1Isotron accelerometers00 - 0Adhesive
65HT-10Isotron accelerometers1-55 - 175Thread
66A11Isotron accelerometers10-55 - 125Adhesive
66A12Isotron accelerometers100-55 - 125Thread
66A50Isotron accelerometers5-55 - 125No selection
67-10Isotron accelerometers10-55 - 175Thread
67-100Isotron accelerometers100-55 - 175Thread
7250A-10Isotron accelerometers10-55 - 125Thread
7250A-2Isotron accelerometers2-55 - 125Thread
7250AM1Isotron accelerometers00 - 0No selection
7250AM2Isotron accelerometers00 - 0No selection
7251A-10Isotron accelerometers10-55 - 125Thread
7251A-100Isotron accelerometers100-55 - 125Thread
7251A-500Isotron accelerometers500-55 - 125Thread
7251AHT-500M1ISOIsotron accelerometers500-55 - 150Thread
7251B11Isotron accelerometers10-55 - 125Thread
7251B12Isotron accelerometers100-55 - 125Thread
7251HT-100Isotron accelerometers100-55 - 150Thread
7251HT-500Isotron accelerometers500-55 - 150Thread
7253C-10Isotron accelerometers10-55 - 125Thread
7255A-01Isotron accelerometers0.1-18 - 66Thread
7255A-1Isotron accelerometers1-18 - 66Thread
7257AT-010-YYYIsotron accelerometers10-55 - 100Thread
7257AT-100-YYYISOIsotron accelerometers100-55 - 100Thread
7259B-10Isotron accelerometers10-55 - 125Thread
7259B-100Isotron accelerometers100-55 - 125Thread
7259B-25Isotron accelerometers25-55 - 125Thread
751-10Isotron accelerometers10-55 - 125Thread
751-100Isotron accelerometers100-55 - 125Thread
752A12Isotron accelerometers10025 - 85Thread
752A13Isotron accelerometers100025 - 85Thread
86Isotron accelerometers10-10 - 100Thread
87-1Isotron accelerometers1-20 - 100Thread
87-10Isotron accelerometers10-20 - 100Thread
The sensing element of Piezoelectric accelerometers is a piezoelectric material that can be either natural quartz crystals or man-made polycrystalline ceramics. The basic principle of Piezoelectric Effect is an inherent or induced property of these crystals. As the crystal undergoes stress due to applied force during acceleration, negative and positive ions will accumulate onto the opposed surfaces of the crystal. The amount of accumulated charge is directly proportional to the applied force when the applied acceleration can be calculated according to Newtons’ law of motion F=mA.The sensing element is housed in a suitable sensor body to withstand the environmental conditions of the particular application. One side of the piezoelectric material is connected to a rigid post at the sensor base. A seismic mass is attached to the other side. Due to the piezoelectric effect a charge output proportional to the applied force is generated and the charge output signal is proportional to the acceleration of the mass. Over a wide frequency range both sensor base and seismic mass have the same acceleration magnitude so that the sensor measures the acceleration of the testing object.Piezoelectric accelerometers cannot measure constant acceleration because they are inherently AC coupled, however, they are typically the most versatile and economic choice for measuring fast transient and periodic acceleration wherever shock or vibration is of interests.A proof mass is bonded to the crystal and an electrical charge is generated when a force is imposed upon the crystal during acceleration and this output is relative to the applied force. The piezoelectric element is connected to the Sensor output via a pair of electrodes. The sensing element is housed in a suitable sensor body to withstand the environmental conditions of the particular application. One side of the piezoelectric material is connected to a rigid post at the sensor base. A seismic mass is attached to the other side. Due to the piezoelectric effect, a charge output proportional to the applied force is generated and the charge output signal is proportional to the acceleration of the mass. Over a wide frequency range both sensor base and seismic mass have the same acceleration magnitude so that the sensor measures the acceleration of the testing object. Piezoelectric accelerometers cannot measure constant acceleration because they are inherently AC coupled, however, they are typically the most versatile and economic choice for measuring fast transient and periodic acceleration wherever shock or vibration is of interests.
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