Class 1 Sound Level Meters
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•Sound Level Meter NL-31
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•Complies with existing IEC standards and the new IEC/CDV 61672-1 standard (Class 1)
•No range switching required due to the 100 dB wide dynamic range.
•Simultaneous measurement of equivalent continuous sound pressure level
Leq, percentile levels, Maximum levels (Lmax), etc.
•Graph display for sound level fluctuations and back erase function
•Backlit LCD screen for high-visibility display
•One 16 MB Compact Flash card provides up to 1.3 days of Lp readings taken
every 100 ms.
•Timer function for automatic measurement over extended periods
•Dual-measurement function allows setting level determination
•Comparator output function allows setting level determination
•Expansion features, including a range of filter settings, are provided
by filter cards
•Power failure compensation function when the AC adapter is used
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| Specifications |
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NL-31 |
| Applicable standards |
IEC60651: 1979 Type 1
IEC60804: 1985 Type 1
IEC/CDV: 61672-1 Class 1 |
| Measurement functions |
Sound level (Lp)
Equivalent continuous sound presure
level
(Leq)
Sound exposure level (LE)
Maximum (Lmax) and Minimum (Lmin) sound
pressure
level
Percentile sound pressure level (LN)(5 selectable settings) |
| Measurement Range |
A weighting: 28-138 dB
C weighting: 33-138 dB
Flat: 38-138 dB
Peak sound level: 141 dB |
| Frequency Range |
20-12500 Hz (including microphone) |
| Time weighting |
Fast, Slow, Impulse (Impulse is selectable only for auxiliary processing
functions) |
| Microphone |
1/2-inch prepolarized condenser type UC-53A |
| Display |
Backlit LCD panel (128 X 64 dots{121 icons) |
| Internal Memory |
Manual, Auto(Auto store is possible only when the optional CF card is inserted.) |
| Power requirement |
Four IEC R6 (size "AA") batteries
AC adapter NC-34 series (option) |
| Battery life(LR6) |
27h |
| Dimensions and weight |
260 (L) X 76 (W) X 33 (D) mm
Approx. 400 g (incl. batteries) |
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•Precision Integrating Sound Level Meter
with 1/3 octave real-time analyzer NA-27
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•Dual Measurement with main and sub
•Real-time 1/1-octave and 1/3-octave
analysis
•Infrared rays data communication
•8-hour continuous operation with alkaline
batteries
•Memory max. 10000 data capacity
•Various trigger functions (external
trigger, level trigger and time trigger)
•Data exclusion (back-erase) function
•Time delay setting function
•Back up function
•Large display with backlighting
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| Specifications |
| Applicable standards |
IEC651: 1979 Type 1 IEC804: 1985 Type 1
ANSI SI.11 Type 1D, IEC 1260-1995 |
| Dual measurement and real-time frequency
analysis |
Main and sub
Individual Frequency weighting and
time weighting
settings for main and sub
1/1, or 1/3 octave band real-time frequency
analysis in main channel |
| Measurement functions |
Instantaneous sound pressure level (Lp)
Equivalent continuous sound presure
level
(Leq)
Sound exposure level (LE)
Maximum (Lmax) and Minimum (Lmin) sound
pressure
level
Percentile sound pressure level (Lx)
Takt-max sound pressure level (Ltm3,
Ltm5)
Waveform peak hold (Lpeak) |
| Max. Measurement Level |
140 dB rms, 133 dB at c.f. 3, 143 dB peak
for peak hold |
| Frequency Range |
20-12500 Hz (including microphone), 10-20000
Hz (amplifier only) |
| Time weighting |
Main channel: Fast, Slow, 35 ms, 10 ms
Sub channel: Fast, Slow, 35 ms, 10 ms, Impulse,
Peak (peak hold) |
| Microphone |
1/2-inch prepolarized condenser type UC-53A |
| Display |
Backlit LCD panel (192 X 192 dots)
Numeric display: 4-digit display, update
cycle 1s, resolution 0.1 dB
Bar graph indication: Scale range 60 dB in 0.5-dB steps, update cycle 0.1s
Sound level meter : Scale range 60
dB, update
cycle 0.1s
Analyzer: Scale range 70 dB update
cycle
0.1s |
| Internal Memory |
Manual and auto store mode for instantaneous
value and processing results
Auto single mode: Up to 10,000 data (for
SLM), 4000 data (for 1/1 oct. analysis),
2000 data (for 1/3 oct. analysis) |
| Infrared rays communication |
Data transmission with a PC
Remote control by an infrared rays controller
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| Power requirement |
Four IEC R14P (size "C") batteries
Battery life: Continuous operation with LR6
(alkaline) approx. 8 h (1/3 oct. analysis)
AC adapter NC-94 (option): 100 to 240 V |
| Dimensions and weight |
300 (L) X 100 (W) X 50 (D) mm
Approx. 800 g (incl. batteries) |
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•Precision Integrating Sound Level Meter NL-18
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 •Dual Measurement with main and sub channels
•One full day measuerment with batteries
•7200 store address available for date
set of Leq, LE, Lmax, Lx and Ltm
•Real time, Back erased level and time,
and Analyzed data by bar graph shown on display
•Protective cover for preset measurement
parameters
|
| Specifications |
| Applicable standards |
IEC651: 1979 Type 1
IEC804: 1985 Type 1 |
| Measurement functions |
Instantaneous sound pressure level (Lp)
Equivalent continuous sound presure
level
(Leq)
Sound exposure level (LE)
Maximum (Lmax) and Minimum (Lmin) sound
pressure
level
Percentile sound pressure level (Lx)
Takt-max sound pressure level (Ltm3,
Ltm5)
Waveform peak hold (Lpeak) |
| Max. Measurement Level |
140 dB rms, 133 dB at c.f. 3, 143 dB peak
for peak hold |
| Frequency Range |
20-12500 Hz (including microphone), 10-20000 Hz (amplifier only) |
| Time weighting |
Main channel: Fast, Slow, 10 ms
Sub channel: Fast, Slow, Impulse, Peak (peak hold) |
| Microphone |
1/2-inch prepolarized condenser type UC-53A |
| Display |
Backlit LCD panel (128 X 64 dots)
Numeric display: 4-digit display, update
cycle 1s, resolution 0.1 dB
Bar graph indication: Scale range 60 dB,
update cycle 0.1s
Level vs. time display: Scale range
70 dB,
time range 10 s (0.1s steps) or 100s
(1s
steps) |
| Internal Memory |
Manual and auto store mode for instantaneous
value and processing results
Auto 1: Up to 100,000 data |
| Power requirement |
Four IEC R6 (size "AA") batteries
Battery life: Continuous operation with LR6 (alkaline) approx. 20 h (main
and sub)
24 h (main only), R6P (manganese) approx. 10h (main and sub), 12 h (main
only)
AC adapter NC-34 series (option): Current rating approx. 70 mA (main and
sub, 6V DC), 60mA (main only, 6V DC) |
| Dimensions and weight |
320 (L) X 90 (W) X 50 (D) mm
Approx. 500 g (incl. 4 pcs. of R6P batteries) |
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| Class 2 Sound Level Meter |
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•Sound Level Meter NL-20
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•Conpliant with IEC standards and new IEC/CDV 61672-1 standrd
•Wide dynamic range of 100 dB eliminates need for range switching
•Simultaneous measurement of equivalent continuous sound level
•Graph display shows sound lebel fluctuation; available when using back-erase
function
•Easy-to-read backlit LCD display
•Up to 34 hours of continyous operation possible with four IEC R6 (size
AA) alkaline batteries; external power supply by AC akapter
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|
NL-20 |
| Applicable standards |
IEC60651: 1979 Type 2
IEC60804: 1985 Type 2
IEC/CDV: 61672-1 Class 2 |
| Measurement functions |
Sound level (Lp)
Equivalent continuous sound presure
level
(Leq)
Sound exposure level (LE)
Maximum (Lmax) and Minimum (Lmin) sound
pressure
level
Percentile sound pressure level (LN)(5 selectable settings) |
| Measurement range |
A weighting: 28-138 dB
C weighting: 33-138 dB
Flat: 38-138 dB |
| Frequency Range |
20-8000 Hz (including microphone) |
| Time weighting |
Fast, Slow |
| Microphone |
1/2-inch elected condenser type UC-52 |
| Display |
Backlit LCD panel (128 X 64 dots{121 icons) |
| Internal Memory |
Manual |
| Power requirement |
Four IEC R6 (size "AA") batteries
AC adapter NC-34 series (option) |
| Battery life(LR6) |
34h |
| Dimensions and weight |
260 (L) X 76 (W) X 33 (D) mm
Approx. 400 g (incl. batteries) |
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•Sound Level Meter NL-21
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 •Complies with existing IEC standards and the new IEC/CDV 61672-1 standard
(Class 2)
•No range switching required due to the 100 dB wide dynamic range.
•Simultaneous measurement of equivalent continuous sound pressure level
Leq,percentile levels(LN),Maximum lebels (Lmax),etc.
•Graph display for sound level fluctuations and back erase function
•Backlit LCD screen for high-visibility display
•One 16 MB Compact Flash card provides up tu 1.3 days of Lp readings taken
every 100 ms.
•Timer function for automatic measurement over extended periods
•Dual-measurement function allows setting level determination
•Comparator output function allows setting level determination
•Expansion features, including a range of filter settings, are provided
by filter cards
•Power failure compensation function when the AC adapter is used |
|
NL-21 |
| Applicable standards |
IEC60651: 1979 Type 2
IEC60804: 1985 Type 2
IEC/CDV: 61672-1 Class 2 |
| Measurement functions |
Sound level (Lp)
Equivalent continuous sound presure
level
(Leq)
Sound exposure level (LE)
Maximum (Lmax) and Minimum (Lmin) sound
pressure
level
Percentile sound pressure level (LN)(5 selectable settings) |
| Measurement range |
A weighting: 28-138 dB
C weighting: 33-138 dB
Flat: 38-138 dB
Peak sound level: 141 dB |
| Frequency Range |
20-8000 Hz (including microphone) |
| Time weighting |
Fast, Slow, Impulse (Impulse is selectable only for auxiliary processing
functions) |
| Microphone |
1/2-inch prepolarized condenser type UC-52 |
| Display |
Backlit LCD panel (128 X 64 dots{121 icons) |
| Internal Memory |
Manual, Auto(Auto store is possible only when the optional CF card is inserted.) |
| Power requirement |
Four IEC R6 (size "AA") batteries
AC adapter NC-34 series (option) |
| Battery life(LR6) |
32h |
| Dimensions and weight |
260 (L) X 76 (W) X 33 (D) mm
Approx. 400 g (incl. batteries) |
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•Sound Level Meter NA-26
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•Simplified operation
•No need for range switching
•Immidiately usable at power-on
•Easy to read LCD display
•Sliding cover contains useful help
•Power saving design
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| Specifications |
| Applicable standards |
IEC60651: 1979 Type 2 |
| Measurement functions |
Instantaneous sound pressure level (Lp),
Maximum hold (Lmax) |
| Max. Measurement Level |
137 dB rms, 130 dB at c.f.3 |
| Measurement Range |
30 dB to 130 dB (four ranges) |
| Frequency Range |
20-8000 Hz |
| Time weighting |
Fast, Slow |
| Microphone |
1/2-inch prepolarized condenser type |
| Display |
LCD, resolution: 0.1 dB |
| Power requirement |
Two IEC R6 (size "AA") batteries |
| Dimensions and weight |
227 (L) X 78 (W) X 31 (D) mm
Approx. 260 g (incl. batteries) |
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