Nor12920 pages

Product Data

Nor1292

Tri-axial geophone

Sensor for vibration velocity
High sensitivity
Tri-axial
Vibrations in buildings
Spirit level included for fast setup
Passive sensor – no external power
Rugged

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 at 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.

PD 1295 Ed1Rev0 Eng 1010

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.

10

Relative response [dB]

•
•
•
•
•
•
•

Nor1292 in combination with Nor133/Nor136

0
− 10

Nor1292

− 20
− 30
− 40
− 50
− 60

0.1

1

10

100

1000

Frequency [Hz]

The frequency response may be corrected for use below the resonce
frequency of 4,5 Hz