This product is now obsolete.
A sound investment for
now and the future.
The advanced CEL-450/490 series is a
comprehensive instrument family for
a wide range of applications. It has
been designed for convenience and ease
of use. From simple noise at work
surveys to full environmental audits,
the CEL-400 can do it all simply and
There is a wide selection of models
available with Class 1 or Class 2
accuracy, so you can purchase an
instrument tailored to suit your
Single 140dB measurement range, no need for range selection.
Compliant with latest IEC 61672 standard.
Available in both Class 1 and Class 2 accuracy grades.
Real-time frequency analysis in octave and one-third octave.
Easy to use menu with user definable configurations.
Choice of broadband only, octave or one-third octave instruments.
Firmware and software upgradeable.
Clear, backlit screen.
Large 2Mb memory capable of storing over 800000 data points.
Comprehensive software package with graphical reporting, graphing & analysis functions.
Fast storage of noise time history down to 10ms.
Noise at work:
of noise exposure
Measurements for the
selection of hearing
Machinery noise tests
Time history of noise levels
Transportation noise studies
Transient noise events
Short or long term
For selection of Class 1 or Class 2 accuracy of instrument please add the appropriate number to the
instrument parts (e.g. CEL-450.A1).
Standard kits are available to add a kit case, windshield,
download cable, dB23 software, CEL-110 calibrator and operating instructions. For a kit simply
add /K1 to the part number above (e.g. CEL-450.A1/K1).
UKAS calibration is available for applications where a traceable certificate of calibration is required.
There are two main products within the CEL-400 series range, the CEL-450 and CEL-490.
The primary role of the CEL-450 model is an
occupational hygiene instrument. It can be purchased as a broadband model which automatically calculates noise exposure (Lepd) and can
be used for workplace noise assessments. For the selection of the correct hearing protection the CEL-450 features the calculation of
LCeq-LAeq for use in the HML method, or a more detailed assessment of the frequencies of noise an employee is exposed to can be made
with the octave band (B) model. For product development the 1/3 octave version will measure the more ‘tonal’ components of noise,
giving better assessment of noise emissions and allowing noise reduction techniques to be applied more effectively. In frequency
analysis modes the instrument measures all the bands simultaneously in real-time, making for fast and accurate results.
The CEL-450 will also measure time history profiles of noise, that show how the noise climate has changed over time. The
stored results can then be downloaded, and displayed on the dB23 software as illustrated.
The main role of the CEL-490
is as an environmental instrument. This model adds the statistical measurement parameters (Ln%), required for
environmental legislation and these can be calculated in real-time octave modes on the relevant versions.
The CEL-490 also adds more comprehensive logging functions in the form of period time intervals selectable
from 10 milliseconds to 1 hour as well as time history profiling. Automatic start/stop timers are standard
functions on the CEL-490 and with an outdoor protection system the CEL-490 can be used for
unattended monitoring. Modem kits are also available for remote downloading of data.