By employing the original DSP technology, which eliminates the self-noise of the microphone with preamplifier, the lower limit of measurement has been drastically extended to lower than 0 dB-SPL. Linearity range, extended to 100 dB in the usual state, further expands to that corresponding to the measurement range 0～80dB(A) by holding the 0-dB function in ON position.

It enables to measure ultra-low sound pressure level, so displaying its greatest power as in the quietness measurement of, or tone quality evaluation of, various silent-type IT/OA equipments, as well as in the measurement of air-conditioning noise or sound isolation in a concert hall with ambient noise below NC-20.

Replacing the card with SD card (option) enables to add the specified analyzing function to TYPE6236.

－1/1 and 1/3-octave Real-time analysis card

－FTT analysis Card

－RSR card (Real Sound Recording Card)

In response to your great deal of needs, the function of displaying NC-bar with evaluated NC index finally equipped!!

By inserting "1/1 and 1/3-octave Real-time Analysis Card" in TYPE6236/TYPE6238, evaluated NC index is displayed in real time, empowering the evaluation of on-site noise measurement.

TYPE6236/TYPE6238 is equipped with high precision electret condenser microphone(TYPE7052NR/TYPE7146NR) which ACO is most proud of.
The measurement frequency range covers entire audible frequencies,TYPE6236:20Hz～20kHz,TYPE6238:5Hz～20kHz.

"Microphone has a image of breakable object needing frequent replacement"

Such an image is broken down by ACO microphone of highly anti-shock capability,developed through lengthy research and development work.
ACO Microphones,clearing various strength tests,delivers the customers from very delicate handling of the microphone,offering the environment focused on sound measurement.

SLS101

SLF101

Sound Level Meter

Precision Sound Level Meter

JIS C1509-1:2005 ClassⅡ
IEC 61672-1:2002 Class Ⅱ

JIS C1509-1:2005 classI
IEC 61672-1:2002 ClassI

20Hz～20kHz
(Conforms with
measurement law
20Hz～8kHz)

5Hz～20kHz
(Conforms with
measurement law
20Hz～12.5kHz)

TYPE 7052NR
(-33dB,Stand-alone -31dB)

TYPE 7146NR
(-29dB,Stand-alone -27dB)

A:28～130dB
(0～80dB/0-dB measurement function in ON)
C:36～130dB
Z(FLAT):40～130dB
C peak:55～141dB
Z(FLAT)peak:60～141dB

A:28～130dB
(0～80dB/0-dB measurement function in ON)
C:37～130dB
Z(FLAT):39～130dB
C peak:55～141dB
Z(FLAT)peak:60～141dB

The lower limit of the measurement range in dB lies 6dB higher than self-noise level.

The lower limit of the measurement range in dB lies 8dB higher than self-noise level.

10dB 6step
20～80dB、20～90dB、20～100dB
20～110dB、30～120dB、40～130dB
(0～80dB／0-dB measurement function in ON)

100dB

Fast、Slow、Impulse

A、C、Z(FLAT)

Sound pressure level(L p )
A-weighted sound pressure level
C-weighted sound pressure level(L A /L C )
Equivalent continuous A-weighted sound pressure level(L Aeq )
Sound Exposure level(L AE )
Maximum sound pressure level(L Amax )
Minimum sound pressure level(L Amin )
Percentile sound pressure level(5 freely selectable values、L AN )
Peak Sound Pressure level(L peak )
C- weighted Peak Sound Pressure level(L Cpeak )
Power average of maximum sound pressure level in a given interval(L Atm5 )
Impulse Sound pressure level(L AI )
Impulse equivalent continuous sound pressure level(L AIeq )

1s/3s/5s/10s/1min/5min/10min/15min/30min/1h/8h/12h/24h
Manual(Max. 199h59m59s)

20.8μs(L eq 、L max 、L min )、100ms(L N )

Pause, and a function that deletes preceding 3 or 5 sec. dat
Memory start；Selectable Auto or Manual

A marker can be set to start and stop the measurement at any specified moments.

Liquid crystal and Backlight(128×64 points)

Display range:4digit display
Display cycle：display Period: 1s

Display Period:0.1s

Over；+3dB from upper limited scale
Under；－0.6dB from lower limited scale

Battery　5 steｐs display

year/month/day/hour：minute：second

ormal pause function, as well as the function of canceling the data before pausing the measurement, are available.

Electric calibration with internal oscillator (1kHzsine wave)

φ2.5Jack
Output：1Vrms(FS)
Output impedance：600Ω
Load impedance：more than 10kΩ

φ2.5Jack
Output：2.5V(FS)
0.25V/10dB Output impedance：50Ω
Load impedance：more than10kΩ

True RMS detection circuit（computing type）

Digital

Sound pressure level or Processed values stored in built-in Memory or Memory card
Manual Storage：Sound level, Calculation value, Memory time,Store the Sampling to Built-in memory or on Memory card,
Auto Storage：Sampling interval 100ms, 200ms, sound level,Leq etc. Processing Card ：Storage of calculation results

Direct output to printer, control and output data to computer Digital output of real-time noise waveform with USB interface

Comparator Function with threshold level

Four 1.5V Alkaline cells IEC type LR6, Optional AC adapter

Alkaline dry cell ; Approx.9hours when Switch on a back light ;Approx.1/3

Temperature：-10～50℃
Humidity：30%～90%RH(no condensation)

86(W) x 285(H) x 46(D)

Less than APPROX（450g(including Batteries)