Geophones, Seismographs

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Meggitt Sensing Systems - Wilcoxon Research

Seismic sensor - 4 - 20 mA | PC420

The Seismic Sensor Series PC420 is manufactured Meggitt Sensing Systems, is a full scale reading of 20mA...

Seismic sensor - 4 - 20 mA | PC420

The Seismic Sensor Series PC420 is manufactured Meggitt Sensing Systems, is a full scale reading of 20mA that indicates that maximum range of displacement that is present. The product is hermetically sealed and its ESD, reverse writing and overload is protected. The product can resist corrosion and it reduces influence of blade pass and gear mesh frequency. Lastly, the current ranges from 4 mA up to 20 mA.

Seismic sensor - 10 V/g, 0.05 Hz - 0.5 kHz | 731A

The 731A Series, manufactured by Meggitt, is an ultra-quiet, ultra-low frequency seismic accelerometer...

Seismic sensor - 10 V/g, 0.05 Hz - 0.5 kHz | 731A

The 731A Series, manufactured by Meggitt, is an ultra-quiet, ultra-low frequency seismic accelerometer...
Metrix Instrument Co.

Seismic sensor

Model: SA6200A

General purpose accelerometer designed for use on a wide variety of machine types with its broad frequency response of 0.5 to 10 kHz (+/- 3dB), 50g range, and...

Seismic sensor

Model: SA6200A

General purpose accelerometer designed for use on a wide variety of machine types with its broad frequency response of 0.5 to 10 kHz (+/- 3dB), 50g range, and mounted resonance of 13 kHz.
A built-in amplifier provides an industry-standard 100mV/g low-impedance, constant-current output that is compatible with vibration monitoring systems, electronic switches, and 4-20mA signal conditioners.

The sensor consists of a temperature-stabilized piezo-electric core and an amplifier, packaged together in a 303 stainless steel case that is electrically isolated from the sensing circuit. A choice of mounting studs is available. Consult the product datasheet for available hazardous area approvals.

Low-frequency seismic sensor - SV6300

Model: SV6300
The Metrix SV6300 Piezo-Velocity Sensor is similar to our SA6200A accelerometer, but provides a velocity rather than acceleration output. The solid-state design has no moving parts to wear out and may be mounted...

Low-frequency seismic sensor - SV6300

Model: SV6300
The Metrix SV6300 Piezo-Velocity Sensor is similar to our SA6200A accelerometer, but provides a velocity rather than acceleration output. The solid-state design has no moving parts to wear out and may be mounted in any axis, unlike many moving-coil devices. It is also less sensitive to the cross-axis vibration that can be especially damaging to moving-coil devices.

A built-in amplifier provides a 100mV/in/sec, low-impedance, constant-current output that is compatible with vibration monitoring systems, electronic switches, and 4-20mA signal conditioners.



The sensor consists of a temperature-stabilized piezo-electric core, amplifier, and integrator, packaged together in a stainless steel case that is electrically isolated from the sensing circuit. A choice of mounting studs is available. Consult the product datasheet for available hazardous area approvals.
Norsonic AS

Geophone - Nor1292

The tri-axial geophone Nor1292 is a sensitive transducer for vibration velocity based on a rugged geophone construction used by seismologists and geophysicists for decades. One main application is for the measurement of vibrations in buildings. The frequency response is essentially flat from the resonance frequency 4,5 Hz and...

Geophone - Nor1292

The tri-axial geophone Nor1292 is a sensitive transducer for vibration velocity based on a rugged geophone construction used by seismologists and geophysicists for decades. One main application is for the measurement of vibrations in buildings. The frequency response is essentially flat from the resonance frequency 4,5 Hz and up to at least 500 Hz. However, by using the frequency compensation found in some Norsonic instruments like Nor133 and Nor136, the applicable frequency range may be extended downwards to 1 Hz. This also applies if the signal is measured as function of frequency, e.g. 1/3-octave bands where frequency correction may be used.


The transducer is a passive device and needs no power for operation.



The geophone Nor1292 plugs directly into the input socket of the six channel vibration analyzer Nor136. It will then connect directly to channel 1, 2 and 3. A second geophone may be connected to channel 4, 5 and 6 of the same Nor136 instrument by the use of an adapter.By the use of adapters, the unit may be connected to the tri-axial vibration analyzer Nor133.


The unit may also be applied in connection with a suitable sound level meter like Nor140. Only one direction can then be measured at the time by a one-channel instrument.
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