Nor 840

Real Time Multi-spectrum Analyzer, Sound Intensity System

£ 40 a day *

The Norsonic 840 is the ideal tool for the experienced acoustician. 1/1, 1/3, 1/12, 1/24-octave + FFT

The dual channel, battery operated analyzer has a bright, back-lit, 10" colour LCD screen. The operator accesses all set-ups using dedicated push-keys to open logical menus, so there is no need to navigate through multi-level menus

All selections may also be made by a numerical key sequence. A HELP description is available for any field in any menu

Features ♦  Dual channel measurements in true octave and third octave bands ♦  0.1 Hz - 20 kHz frequency range in both channels in dual channel operation ♦  True A- and Lin spectral weighting networks in both channels ♦  Easy-to-use single-level menus and direct key control ♦  Large colour VGA display ♦  Microphone, line and charge inputs ♦  Powered from 12 VDC ♦  80 dB dynamic range ♦  Internal memory for up to 32000 spectra ♦  Internal 3.5" MS-DOS compatible floppy disk drive ♦  IEEE-488, Centronics and RS-232C interfaces ♦  Multi-spectrum measurements (level vs. time) ♦  Internal signal generator ♦  Internal reverberation time calculations ♦  Sound intensity measurements - add a GRAS 50AI Sound Intensity Probe ♦  True 1/12 and 1/24 octave filters ♦  800 lines dual channel FFT ♦  Maximum Length Sequence (MLS) for measurements of level differences and reverberation time calculations ♦  Handy unit for field use

The internal PC is ideal for extensive post processing of data and running Windows applications. Numerical + graphical presentation on full colour screen.

Manufacturer's Specifications

Delivered with transient, sound intensity and building acoustics software built-in, but no other accessories, so you only pay for what you need

Please order microphone(s), preamplifier(s), power amplifiers, intensity probes and any extension cables etc., required to suit your applications.


Sound Intensity
Our 840 analyzers are delivered with sound intensity software. If you want to use this option order a probe and accessories

GRAS 50AI	Sound Intensity Probe
GRAS 51AB	Sound Intensity Calibration Unit

Low Sound Pressure Levels
Our Nor 840 analyzers may also be used to measure extremely low sound pressure levels, for more information and to download the Norsonic Application Note click here


MLS - Maximum Length Sequence
For details on the MLS - Maximum Length Sequence technique - both practical and theoretical click here


Other Popular Accessories, Building Acoustics etc.,

Nor 250	Hemi-dodecahedron loudspeaker - 120 dB SWL
Nor 260	Power amplifier with noise generator - 1 kW peak into 4 Ω load
Nor 330	Battery Case for Nor 840, 5AH Ni-Cad [2 hours] battery + charger
Nor 1020	Nor-Xfer PC software
Nor 1201	Preamplifier - 1/2" with Lemo 1B connector - order extension cables as required
Nor 1220	Measurement Microphone - 1/2" air condenser - free-field
Nor 1251	Sound Calibrator- Class 1
Nor 1264	Tripod adaptor for low level measurements, twin microphone holder
Nor 1408	Microphone preamplifier extension cable - 10 m long
Nor 1410	Microphone preamplifier extension cable -   2 m long

* Our standard hire charges are based on a 4-day minimum period, more details and options.

Gracey & Associates   01933 624212

BSI accreditation for instrument hire and calibration

 Home 

 Search