ATP E-Catalogue 2025 - Catalog - Page 37
MET-933 Auto Ranging Sound Level Meter
dB
A/C
Freq
Fast
Slow
Data
Hold
Min
Hold
Max
Hold
Back
Light
Auto
Off
Low
Battery
1
CAL
Battery
The MET-933 is a lightweight and user-friendly sound level indicator offering 4
measurement ranges (3 manually selectable, 1 auto range). It offers selectable 8A9 or 8C9
frequency weightings and a choice of either Fast or Slow time weightings. It is designed
to match the accuracies required of IEC 61672:2013 at ±1.4 dB.
Sound
Frequency range of 31.5 Hz to 8 kHz.
130 dB
1 dB resolution.
LCD display backlight.
Max hold – displays the highest measured value.
x 0.1 dB
Min hold – displays the lowest measured value.
Data hold.
Low battery indicator.
Auto power off after 15 minutes of inactivity.
30 dB
Supplied with: Soft carry case, wind muffler and battery.
Accessories: Spare wind muffler (SL-WM1 + £3.50).
View Product
MET-958 Data Logging Sound Level Meter
dB
A/C
Freq
Fast
Slow
Data
Hold
Data
Logging
Min
Hold
Max
Hold
Back
Light
USB
Auto
Off
Low
Battery
ACDC
Battery
2
CAL
The MET-958 is a data-logging sound meter with 4 measurement ranges (3 manual, 1 auto). It offers selectable
8A9 or 8C9 frequency weightings and a choice of either 8fast9 or 8slow9 time weightings. The data logging feature can
record up to 262,100 readings at intervals of 1 second to 10 hours. The ±1.4 dB accuracy is designed to match
the requirements of IEC 61672:2013. Featuring an ergonomically designed grip, simple function buttons and a
USB connection it is easy to use.
Sound
LCD display backlight.
Data hold.
Max hold – displays highest measured value.
Min hold – displays lowest measured value.
Low battery indicator.
Auto power off after 15 minutes of inactivity
(unless in record mode).
Battery or mains powers (remove battery).
¼ inch camera bush for tripod mounting.
Supplied with: Hard carry case, wind muffler,
3.5 mm earphone plug, 1 metre USB cable, software,
AC/DC mains power adaptor and battery.
Accessories: Wind muffler (SL-WM2 + £3.50).
Sound
Technical Specifications
1
MET-933
130 dB
2
MET-958
x 0.1 dB
Measurement
Ranges
30 to 80 dB
50 to 100 dB
80 to 130 dB
30 to 130 dB (Auto)
30 to 80 dB
50 to 100 dB
80 to 130 dB
30 to 130 dB (Auto)
Measurement
Parameters
Lp, Lmax, Lmin
Lp, Lmax, Lmin
Resolution
0.1 dB, 1 dB (Bar graph)
0.1 dB
Accuracy
±1.4 dB (94 dB @ 1 kHz)
±1.4dB (94 dB @ 1 kHz)
Frequency Range
31.5 kHz - 8 kHz
31.5 kHz - 8 kHz
Frequency
Weightings
'A' or 'C'
'A' or 'C'
Time Weightings
Fast or slow
Fast or slow
Dimensions
158 x 62 x 33 mm
252 x 66 x 33 mm
Screen Size
35 mm
55 mm
Weight
178 g
262 g
Power
1 x 9V PP3 alkaline battery
(LR-61)
1 x 9V PP3 alkaline battery
(LR-61)
Price
£72.00
£220.50
sales@atp-instruments.co.uk
30 dB
View Product
Calibration Options
01530 566800
CAL
Certificate
Issued at
Price
CAL-SL
94 dB & 104 dB at a frequency range of 1 kHz
£86.00
www.atp-instrumentation.co.uk
37
