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  Gracey & Associates Hire and Calibration
  Noise and Vibration Exposure at Work



We have the most comprehensive range of noise and vibration instruments in the UK, supplied by the leading manufacturers.

All our meters, microphones, accelerometers etc., are delivered with current calibration certificates, traceable to UKAS and our ISO 9001 laboratory is audited by British Standards.

Hire is the cost effective solution with overnight access to the latest and best instrumentation.

Gracey & Associates   01933 624212
BSI accreditation for noise and vibration instrument hire and calibration
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Over 500 pages of information on the hundreds of meters and systems we have available for hire.


Noise and Vibration Exposure at Work.

The Health and Safety at Work Regulations require the noise exposure levels at the operators ear and the vibration of hand tools etc., are measured to establish they are 'safe'.

Factories also have a responsibility not to annoy their neighbours, see our environmental noise monitoring section .

This page briefly describes the most popular noise and vibration at work analyzers. For more details, calibrators and other accessories, click the relevant link.

The first section deals with Noise Exposure - or go directly to the Vibration at Work section.


Noise Exposure at Work Section

B&K 2236B   Noise Exposure Meter £ 12 a day *

Bruel & Kjaer Noise Exposure Meter
  1. Bruel & Kjaer sound exposure meter with both A and C weightings plus Fast, Slow and Impulse time constants.
  2. Noise exposure Levels may be logged from 1 second up to hourly intervals.
  3. Measures Peak, Lmax, Lmin, Leq, SEL and 3 Ln values.
  4. Large memory.
  5. Short term and long term dose measurements.
Delivered with a 4188 microphone and windshield in a carrying case - ideal for factory surveys

B&K 2236 Sound Exposure details, factory survey kits and accessories

B&K 2238E   Noise Exposure Analyzer £ 17 a day *

  1. Class 1 meter for workplace noise exposure measurements, includes the following modules -
  2. BZ 7123 - Frequency Analysis Software
  3. BZ 7124 - Logging SLM Software
  4. BZ 7125 - Enhanced SLM Software
  5. BZ 7126 - Basic SLM software.
      Delivered with a 4188 microphone and windshield in a carrying case.

B&K 2238 Noise Exposure details, factory survey kits and accessories

B&K 2250   Sound Exposure Analyzer - with audio recording £ 24 a day *

  1. Bruel & Kjaer's state-of-the-art real time analyzer with many features -
  2. 120 dB dynamic range - no need to change range.
  3. Simultaneous A, C and Z weighted levels with F, S and I Time Constants
  4. Octave and 1/3 octave band measurements from 6.3 Hz to 20 kHz
  5. Logging - level vs time histories
  6. Statistics - Lns
  7. Sound Recording Option enables recording of the measured sound levels, to identify the individual sound sources.
  8. Voice and text annotation of measurements, pre-set time start/stop, back-erase, context-sensitive built-in help, data storage internal and plug-in cards, USB computer interface, free-field & diffuse correction, display optimised for day, night indoor and outdoor use .... etc.,
The audio data is recorded to a large SD card for subsequent archiving and inclusion in your report.

Add an accelerometer for vibration measurements with the optional FFT module.

B&K 2250 Sound Exposure details, options and risk assessment kits

B&K 2260B   Noise Investigator £ 26 a day *

  1. Hand-held real time meter with the BZ 7210 Sound Analysis software, PC compatible filing system and large memory.
  2. The 2260 Investigator is a Class 1 sound level meter with real-time displays of frequency analysis, 1/3-octave spectra and statistical distributions.
  3. Ideal for environmental surveys, noise assessment and gathering field data for further analysis

B&K Noise Assessment Analyzer details, noise survey kits and accessories.

B&K 2260F   Enhanced noise exposure meter - B&K Investigator £ 33 a day *

Modular real time sound analyzer with all the features of the 2260B above,

Also includes the BZ 7206 Enhanced Sound Analysis Software

B&K 2260F Noise Exposure details and factory survey kits


CEL 350   dBadge - Personal Noise Exposure Meter - dosimeter £ 10 a day *
CEL 352   dBadge - Personal Sound Exposure Meter - dosimeter  *** £ 10 a day *
  1. Noise Badge for measuring and logging all workplace noise exposure parameters - BS EN 61252.
  2. Measures LAeq, LCpeak, LAEP,d, % dose and Pa2Hours
  3. + one minute time histories of Leq and Peak noise exposure level
  4. Stores calibration dates, times and levels
  5. Unique LED action level alarm function
  6. Display shows measurement status and data
  7. A windshield, download software and charger included - battery life 32 hours
***  We also have some CEL 352 does meters which are similar to the 350 but also include a Ceq - Aeq measurement, which some customers require. Please specify when ordering if you would prefer this version.

CEL 350 and 352 Noise Dosemeter details and survey kits

CEL 460   Noise Dosimeter £ 10 a day *

CEL 460 Noise Dosimeter
  1. Easy to use personal noise dosemeters - meets relevant BS and ISO Standards.
  2. Measures s% noise dose
  3. Projected % noise dose for specified period
  4. Selectable profiles with 43,200 data point storage = 1 second profiles for 12 hours.
  5. Preset start / stop.
  6. Logging.
  7. Cumulative Leq, Linear Peak maximum, Lepd etc.,
  8. A windshield and 1/4" calibration coupler is included
CEL 460 Noise Dosimeter details and factory survey kits

CEL 593   Real Time Sound Analyzer £ 29 a day *

Hand held, battery operated, real time octave and third octave sound analyzer - 12 Hz to 20 kHz.
Measures and calculates the commonly required, time averaged parameters and statistical data.
Large memory.

  1. Three modes of operation -
  2. Real time sound analyzer mode with snapshot storage - broad band measurement of SPL, Max, Min, Leq, ILeq, Lavg, Lin Peak, C Peak plus 1/3 or octave spectra of SPL, Max and Leq.
  3. Event analyzer mode either timed or by threshold with delays up to 30 seconds - broad band and spectra measurements of Max, Duration, SEL, Event Leq, Lin Peak, C Peak and 1 sec Max.
  4. Environmental mode with 5 Lns and measurement periods selectable in steps from 0.5 s to 60 min - broad band Max, Min, period SEL, Leq, ILeq, Lavg, Lin Peak, C Peak plus 1/3 or octave spectra Max and Leq as well as the 5 Ln values.
CEL 593 Noise Analyser details

Nor 116   Noise Exposure Analyzer £ 12 a day *

  1. For precision measurements of -
  2. Workplace Noise Assessments, Leq, Lmax sound exposure
  3. Sound Power Measurements
  4. Machinery Labelling.
  5. Includes Fast, Slow and Impulsive measurements of Leq, Lmax, Lmin, SEL, Peak plus Ln values, memory with date and time etc. Parallel A & C weighted measurements. Graphical and numerical display. L(t) level recorder type traces. Store and repeat measurement features ... etc.,
Includes precision microphone, windshield and a mains unit. In the event of a 'flat' battery the last thing the Nor 116 does is to store the current results in the non volatile memory

Nor 116 Noise Exposure Meter details, factory survey kits and accessories.

Nor 118   Precision Noise Assessment Analyzer £ 22 a day *

  1. Norsonic Real Time Class 1 Analyzer with parallel A and C (or Z) networks.
  2. Measurement periods from a second up to several days with level recorder - time mode option.
  3. Filters - 1/1 and 1/3 octave
  4. Statistics - Ln values, all bands, all networks
  5. Level v time - electronic level recorder
  6. Memory
  7. Trigger
Nor 118 Noise Assessment Meter details, options and survey kits

Nor 118 +   Multi-function Workplace Noise Analyzer £ 32 a day *

  1. Norsonic 118 Real Time Precision Sound Analyzer - as above
  2. Multi-spectra
  3. Noise generator
  4. Reverberation calculations
  5. Sound power and other additional options
Nor 118 + Workplace Noise Analyzer details and factory survey kits

Nor 140   Precision Noise Exposure at Work Analyzer £ 25 a day *

  1. Precision sound exposure analyzer with filters, statistics and logging
  2. Features.
  3. Fast, Slow and Impulsive measurements of Leq, Lmax, Lmin, SEL, Peak plus Ln values.
  4. Parallel A and C measurements with graphical and numerical displays.
  5. Filters - 1/1 and 1/3 octave
  6. Statistics - Ln values, all bands, all networks
  7. Level v time - electronic level recorder
  8. Measurement periods from a second up to several days with level recorder - time mode option.
  9. Memory - internal 'flash' and SD card
Nor 140 Noise Exposure Meter details and options


Vibration Exposure at Work Section

B&K 2250   Sound and Vibration Analyzer £ 30 a day *

The B&K 2250 Sound Analyzer doubles up as a Vibration Analyzer if you add an accelerometer set.

♦   The 2250 meter has built-in engineering units so you can read directly in vibration units.
♦   All our 2250s also include the BZ 7223 Frequency Software to analyse the vibration levels in real time.
♦   For narrow band analysis see also the BZ 7230 FFT - Fast Fourier Transform version, detailed below.
♦   All our 2250 meters also include the BZ 7226 Recording/Signal Capture feature to SD Card.

Delivered with an input adaptor and a B&K 4370 general purpose accelerometer set, unless you select an alternative from the same list.

We recommend you add a B&K 4294 Calibrator Exciter, it provides a stable acceleration of 10 m/s2 at 159 Hz.

B&K 2250 details

B&K 2250   FFT Analyzer - Sound and Vibration Analyzer £ 37 a day *

Frequency analysis based on the Fast Fourier Transform [FFT] algorithm is the tool of choice for measurement and diagnostics of machinery noise and vibration. The frequency 'profile' of a machine is its fingerprint, revealing its sources of noise and vibration and their paths to the measurement position.

The 2250 with the BZ 7230 FFT software has many narrow band features :-
♦   Real time operation [no loss of data] up to 20 kHz.
♦   100 up to 6400 lines giving a resolution down to 16 mHz
♦   Linear and exponential averaging
♦   Signal capture and recording
♦   Engineering units, SI metric and UK imperial units
♦   Acceleration, velocity, displacement .......

Plus Max hold, spectrum overlay, zoom, tachometer function, trigger, transient and continuous signals, RMS, PWR, PSD, ESD, Peak, P-P ...... etc., software also included for analysis, reporting and downloading to a PC.

Delivered with an input adaptor and a B&K 4370 general purpose accelerometer set, unless you select an alternative from the same list.

We recommend you add a B&K 4294 Calibrator Exciter, it provides a stable acceleration of 10 m/s2 at 159 Hz.

B&K 2250 FFT details

B&K 2511   Vibration Meter £ 14 a day *

  1. Bruel & Kjaer battery operated meter with charge amplifier input, for measuring
  2. Acceleration
  3. Velocity and
  4. Displacement in both
  5. Imperial & Metric units - RMS and TRUE PEAK-PEAK.
Ideal, for use, as a front-end, signal conditioning unit into FFT or other analyzers, DAT recorders etc.

It also includes a 160 Hz reference signal to calibrate complete measurement systems

B&K 2511 details

B&K 2537   Vibration Meter £ 13 a day *

Bruel & Kjaer hand held, battery operated meter for measuring vibration in the workplace.
♦  Suitable for general purpose vibration measurements in the range 0.1 ms-2 to 3000 ms-2
♦  Simultaneous RMS & Peak measurements with linear and hand arm weightings.
♦  Calculates the daily vibration exposure levels based on short term measurements.
♦  Meets BS EN ISO 5349 and 8041 Standard requirements.

Delivered with a 4505 accelerometer + a DB 3585 mounting bracket and nylon fixing ties for
vibration white finger surveys

B&K 2537 details and accessories

B&K 4447   Bruel & Kjaer Hand Arm, Whole Body Vibration Meter £ 24 a day *

  1. Hand-held system for measurement and evaluation of HAVS, WBV and WBV.
  2. In accordance with BS EN ISO 8041-2005, BS EN ISO 5349-2 and BS ISO 2631-1
  1. For the measurement of:-
  2. hand arm vibration - HAVS.
  3. vibration white finger - VWF.
  4. whole body vibration - WBV.
Includes a 3-axis accelerometer, hand arm attachments, charger and download software.

To measure whole body vibration exposure add the 4515-B-002 Seat Pad below.

more details, hand arm and whole body kits see also the Larson Davis HVM100 Meter below

B&K 4515-B-002   Triaxial Seat Pad - for whole body measurements £ 10 a day *
  Specially designed for the measurement of whole body vibration exposure with the 4447 analyzer above. A triaxial accelerometer housed in a semi-rigid rubber disc and complies with ISO 7096, ISO 2631 and ISO 10326-1. It can be placed under a seated person, on a vibrating surface, or strapped onto the body. It detects vibration in directions along the body, back-to-front, and side-by-side - more details.  


DI 2200   FFT Analyzer  

DI have withdrawn support for their 2200 FFT analyzer. Over the years this analyzer built up a well deserved following; so rather than just remove it from our list we will retain this entry for a while to explain the situation and point returning DI-2200 customers towards it's worthy successor - the B&K 2250 with the FFT option.


B&K 2250 FFT

HVM100   Hand Arm and Whole Body Vibration Meter - 3 axis £ 24 a day *

Designed specifically for the measurement of Hand Arm and Whole Body Vibration.

Simultaneous 3-channel measurements of the X, Y and Z vibration levels plus the vector sum,
using the relevant weighting curves.

Conforms to BS ISO 2631, 5349, 6841, and 8041 standards.

The Larson Davis HVM100 includes a SEN 020 triaxial accelerometer with mechanical adaptors for
VWF - vibration white finger measurements.

more details and kits - see also the B&K 2537, B&K 4447 and the Vibrock V-901.

SEN 027   Triaxial Seat Pad Sensor for HVM100 £ 10 a day *
  For Whole Body Vibration [WBV] measurements with the Larson Davis HVM100.
Sensitivity ≈ 100 mV/g ≈ 10 mV/ms-2


V 901-1   Vibration Recorder £ 25 a day *

♦   Vibrock single channel, 3-axis vibration analyzer for continuous level recording
     or logging of vibration events
♦   Triaxial transducer for simultaneous 3-axis recording
♦   Measures velocity (PPV), displacement and acceleration
♦   LCD display of current levels and maximum levels
♦   Up to 300 events or several weeks continuous recording may be stored
♦   Uses 2 ordinary alkaline D cells which will power the system for up 20 days.
♦   Robust, weatherproof and lightweight
♦   Two stage audible alarm available

Vibrock V901 Vibration Recorder details

V 901-2   Vibration Recorder + VDV Vibration Dose £ 33 a day *

Dual channel, 3-axis vibration analyzer for continuous level recording or logging vibration events
+ a VDV transducer to record the whole body vibration dose levels.

Specifications for the velocity, displacement and acceleration transducer as above.

When measuring vibration dose using the VDV transducer, the instrument complies with BS 6472 and BS 7482 part 3

Robust, weatherproof and lightweight

Vibrock V901 Vibration Recorder details


Return to the Noise at Work section.


* Our standard hire charges are based on a 4-day minimum period, details and other options.
Gracey & Associates   01933 624212
BSI accreditation for instrument hire and calibration
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Additional cables, calibrators etc., available for most equipment.

over 500 pages of information plus a glossary with hundreds of terms and parameters.