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Seismic Accelerometers
sense ground vibration.
See Also: Seismic, Seismometers, Seismic Arrays, Earthquake
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Accelerometers
Columbia Research Laboratories
The force balance accelerometer has a classical critically-damped, second-order frequency response. There is no peaking in the response but simply a smooth roll-off above the natural frequency. This property along with the excellent characteristics of the "HP" torquer design makes Columbia accelerometers the best choice for demanding applications where precise DC and near-DC measurements are needed in demanding shock and wide band vibration environments. Columbia force balance accelerometers are available to cover virtually all applications. Low noise, high output units can be used for seismic structure motion studies while miniature, high range versions are optimum for measuring more violent high G environments encountered in many industrial, aircraft and missile applications.
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Triaxal Seismograph
BC 1313 TRIAXIAL SEISMOGRAPH
BC 1313 seismographs are seismic accelerometers, the parameter measured – vibration acceleration. For BC 1313 seismic transducers, the system is provided for sensing element electrical stimulation using an actuator to determine conversion ratio true value during periodic recalibration without dismantling. Power check system is also allowed for in BC 1313 seismographs.
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Linear Accelerometers
Columbia Research Laboratories
Columbia Research Labs line of Force Balance Linear Accelerometers offers low cost, high performance, general purpose single axis accelerometers that are ideal for DC and low frequency measurements, with both voltage and current signal outputs available. Also offered are Columbia's Solid State Sensors and our specialized Airborne Sensors that generate outputs specifically designed to operate from +24 to +32VDC aircraft power, that is excellent for airborne telemetry applications. And our Low Noise Sensors are designed for use in seismic, low level, low frequency motion studies.
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Miniature
Columbia Research Laboratories
This group is made up of the 6000 and 7000 Series Accelerometers. The 6000 Series offers detachable cables and connector assemblies, a special inverted seismic element for mechanical isolation and other features normally available only on standard size sensors. The 7000 Series are true "shear-mode" design accelerometers which offer performance characteristics and accuracies normally only available with standard size accelerometers. High temperature models of these series are available and will operate to +500°F. For best performance use with Columbia Model 4601 Charge Amplifier or Model 5810 Inline Charge Converter.
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Seismic Transducers Calibration System
Calibration of the seismic sensors should be conducted in the low-frequency domain, which means, that the relative method used for calibration of the vibration transducers is not applicable since it does not guarantee the required accuracy level. The problem is that the reference accelerometers have uneven AFR characteristic in the low-frequency domain. Thus, calibration of seismic transducers requires implementation of a different approach.
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Accelerometers
ROGA-Instruments provides a broad range of accelerometers for General applications, Seismic measurements, High acceleration and shock, Light test objects, Triaxial measurements and Industrial applications.
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Force Balanced Accelerometer
PA-23, PA-23BH, S-230
The Geotech Model S-230 is a high resolution, 1-component, force balanced accelerometer capable of meeting the noise and stability requirements of the most demanding seismic studies. It features a very wide frequency response (DC to 90 Hz) and an internal calibration coil.
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Digital Magnetic Compass
SeaTRAX
The SeaTRAX with PNI’s high sensitivity magnetometers and accelerometers is a COTS high- performance heading sensor for seismic streamers and towed arrays.
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High Sensitivity Accelerometers
Metra Mess- und Frequenztechnik in Radebeul e.K.
The piezoelectric accelerometers on this page are intended for the measurement of lowest vibrations. Typical fields of application include the monitoring of buildings, dams, bridges, oil platforms and pipelines. These sensors are often called seismic accelerometers because they are used to monitor construction activity, volcanoes and earthquakes. Their high sensitivity is achieved -unlike other high sensitivity accelerometers- by the sensing element itself and not by internal amplification. From this results highest resolution and lowest noise.
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Piezoelectric
Columbia Research Laboratories
The Columbia product line of piezoelectric accelerometers is widely known for reliable performance, quality and ruggedness and is always expanding to meet the unique challenging and ever changing requirements of our customers. The selection of specifications, sizes and configurations is large and diverse and suitable for use on many applications requiring features such as, high performance, high accuracy, high temperature, seismic event, 4-20mA output, airborne, miniature size and general purpose use.
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Accelerometer
BC 110
*General purpose accelerometers with integrated electronics;*Sensitivity: 100 mV/g;*Frequency range: 0,5…10000 Hz;*TEDS sampling technology.
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Accelerometers
356A02
Sensitivity (10 %)10 mV/g1.02 mV/(m/s) Measurement Range:500 g pk4900 m/s pk Frequency Range: (5 %)1 to 5000 Hz1 to 5000 Hz Frequency Range: (10 %)0.5 to 6000 Hz0.5 to 6000 Hz Resonant Frequency:25 kHz 25 kHz Broadband Resolution (1)0.0005 grms 0.005 m/s rms Non-Linearity: (400 g, 3920 m/s)1 % 1 % Non-Linearity (500 g, 4900 m/s)2 % 2 % Transverse Sensitivity:5 % 5 %.
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Accelerometers
The unit is based on micro machined MEMS technology. The unit contains a 35g sensing element. The element is scaled to optimise the resolution to suit the g range of interest. An internal amplifier provides an output between 0 and 5 volts. The on board microcontroller and temperature sensor are used for offset drift compensation. This unit can be re-calibrated at the factory.
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COMPACT ACCELEROMETER
AP 1019
The compact accelerometers AP1019 (AP19) are intended for measuring vibration and shock acceleration when integrated in portable or stationary diagnostic systems for laboratory studies use.
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Seismic interpretation Software
Visual-Sunt
This program is a graphical interface for Windows® of the SUNT program, the 32 bits Windows® version of the SU (Seismic UNIX) freeware, the software for the data processing of “Centre of Wave Phenomena”.
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Seismic interpretation Software
Intersism
Intersism it's a software designed to make the entire processing of seismic data coming from a refraction seismic method acquisition. The software extract data directly from the file SEG2 format, SEGY or SU - and give you the possibility to put directly the first arrival picking time.
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Digital Accelerometer
ZET 7152-N Pro
Digital accelerometer ZET 7152-N Pro is intended for recording of vibrational acceleration and is used as a component of stationary vibration monitoring systems used in technological and industrial spheres of application.
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Digital Accelerometer
ZET 7152-N-VER.1
Digital accelerometer ZET 7152-N-VER.1 has a compact triaxial sensing element; it is purposed to measure linear acceleration and vibration acceleration variable component in three mutually perpendicular planes. Light weight of sensing element (only 1.5 g) considerably decreases self-mass load effect, and compact dimensions (8.5×8.5×8.5 mm) allow using ZET 7152-N-VER.1 digital accelerometer to measure vibration in small work-area systems.
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Digital Accelerometer
ZET 7151
The characteristics of the primary transducer are set in the device memory and measurements are performed based on those parameters. Thus, the digital sensors releases the user from setting the measuring channels and data processing. The sensors are fixed on the measurement object while the information transmission units are mounted in electric cabinets. An advantage of the ZETSENSOR units is easy installation and uninstallation as well as indication of feed and signal transmission which, in its turn, facilitates diagnostics of the system at the facility.
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Gyros & Accelerometers
Aero Engineering Support Group
Litton, Delco, Smith, Honeywell, Collins, Allied Signal, Bendix, Rate Gyro, Vertical, Gyro, Directional Gyro, Accelerometers.
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Seismic Signal Conditioners
Seismic signal conditioners are designed to accept an input from (and provide power to) a seismic sensor. They convert the signal to a proportional 4-20mA DC signal that can be used as an input to process control instrumentation such as a PLC or DCS. They provide additional convenience features such as optional displays, BNC connectors for access to the dynamic sensor signal, and bandpass filtering. Metrix offers seismic signal conditioners that can accept either acceleration or velocity sensors, and are available with or without an integral display.
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Piezo-resistive Accelerometer
A Piezo-resistive Accelerometer has a stable structure composed on a silicon chip created by the micromachining and semiconductor production technology. A mass and a beam on which a set of the Piezo-resisters are created on the silicon chip. A set of electrical bridged is formed by such Piezo-resistive resisters to generate signals proportional to the applied acceleration.
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Accelerometer Simulator
MTN/8302
The MTN/8302 is a battery-powered unit designed to simulate a constant current type accelerometer. It enables test and calibration of vibration monitoring equipment such as the Monitran MTN/6000 series.
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Seismic Refraction&Reflection System
WZG-24B
Based on WZG-24 engineering seismograph, WZG-24B 24 channels Engineering Seismograph is developed as a 24bit instrument under Chinese/English version WINDOWS operating system. With years of designing and manufacture experiences, and accepting latest electronic technologies and design ideas, WZG-24B features multi-function, high accuracy, high speed, reliable data and good expandability.
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Seismic Sensors & Transducers
Displacement Pickups are vibration transducers that incorporate a spring-mass system with eddy-current damping using a frictionless pivot. This pivot is a spring flexure that serves as the ‘spring’ and a moment arm attached to the pivot serves as the ‘mass’, which allows resolutions down to the micro inch range. At frequencies above 50Hz, the mass remains fixed in space and becomes an inertial reference. A transducer within the pickup senses the motion of the mounting base relative to the inertial reference and converts it into a proportional signal. Appropriate damping results in a frequency response flat down to 10 Hz. Note that the pickup senses in only one plane, which is perpendicular to the mounting base.
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High Resolution Seismic Streamer
Sentinel® HR
Sentinel HR is the new Sercel solid streamer designed with a very short channel spacing for high resolution acquisition.
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Triaxial Wireless Accelerometer
Our Triaxial Wireless Accelerometer is a vibration sensor specially designed for vibration analysis with universal compatibility. WiSER 3x is a wifi accelerometer that sends 3 axis vibration data + 1 additional channel simultaneously to any data collector in the market. Also, WiSER 3x is a wireless ultra-low noise accelerometer with 15 kHz bandwidth that exceeds the characteristics above all of most conventional accelerometers.
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Linear Accelerometer Switch
Columbia Research Laboratories
Columbia Research Labs Accelerometer Switch is designed to interface with electrical or mechanical systems to control, safeguard against, or warn of undesirable variations in DC and low frequency acceleration. This sensor is available with a selectable switch point, a single or Bi-polar switch, and a choice of input power.
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Industrial Accelerometers
Metra Mess- und Frequenztechnik in Radebeul e.K.
These piezoelectric vibration transducers have been designed for application under rough environmental conditions. They are dust and water protected. Their mounting base is insulated to avoid ground loops which may cause errors, particularly, close to big machinery.
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Long Life Seismic Energy Source
1500LL
Bolt introduced the LONG-LIFETM air gun in 1992. Since then it has become the standard energy source for marine seismic exploration. It is a stable, trouble-free energy source that produces high acoustic output. Another signature advantage is the long work life between required maintenance.The Long-LifeTM product line offers three models with different output volume ranges.
