Marmonix MSL-761 Mini Decibel Meter
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The MarMonix MSL-761 Mini Sound Level Meter offers precise sound measurements from 30 dB to 130 dB with A and C frequency weighting, fast/slow response settings, and a clear 4-digit LCD display. Compact and reliable for various applications.
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Description
The Marmonix MSL-761 sound level meter is a compact Type 2 meter (IEC 61672-1 and ANSI S1.4) that reads 30–130 dB from 31.5 Hz to 8 kHz in 0.1 dB steps on a 4-digit LCD. It offers A and C weighting, FAST (125 ms) and SLOW (1 s) response, Lo and Hi ranges, MAX hold and an OVER warning, and runs about 50 hours on one 9 V alkaline battery. Browse all Marmonix sound level meters.
MarMonix MSL-761 Mini Sound Level Meter
The MarMonix MSL-761 Mini Sound Level Meter is an advanced and compact device designed to accurately measure sound levels across a wide range of applications. With a dynamic range from 30 dB to 130 dB, this sound level meter is perfect for a variety of environments, from quiet indoor spaces to noisy industrial settings. The MSL-761 is equipped with different frequency weightings, A and C, allowing it to cater to both human hearing sensitivity and machine monitoring needs. Whether you’re monitoring ambient noise or conducting industrial noise assessments, this meter provides precise readings with exceptional flexibility.
MarMonix MSL761 Key Features:
The MSL-761 offers:
- Wide Measurement Range: Measures sound levels from 30 dB to 130 dB at frequencies between 31.5 Hz and 8 kHz, making it versatile enough for both low and high sound environments.
- Precision Display: Equipped with a 4-digit LCD display that shows sound pressure levels in 0.1 dB steps for highly accurate measurements.
- Frequency Weighting: Offers A and C equivalent weighted sound pressure levels for different noise applications, whether assessing general environmental noise or specific industrial machinery sounds.
- Fast and Slow Time Constant Settings: Adapt to different sound patterns with fast and slow time constant settings, ensuring optimal readings for both steady and fluctuating noise levels.
The MarMonix MSL-761 is an ideal choice for professionals in fields such as environmental monitoring, construction, and industrial noise management, providing accurate, reliable data in a compact and user-friendly design.
MarMonix MSL-761 Specification
| Specification | Details |
|---|---|
| Standard Applied | IEC61672-1 type 2, ANSI S1.4 type 2 |
| Frequency Range | 31.5 Hz to 8 kHz |
| Measuring Level Range | 30 to 130 dB |
| Frequency Weighting | A/C |
| Microphone | 1/2 inch electret condenser microphone |
| Calibration | Electrical calibration with the internal oscillator (1 kHz sine wave) |
| Display | LCD |
| Digital Display | 4 digits |
| Resolution | 0.1 dB |
| Display Update | 0.5 sec. |
| Response Time | FAST (125 ms), SLOW (1 sec.) |
| Level Ranges | Lo: 30-100 dB / Hi: 60-130 dB |
| Accuracy | ±1.5 dB (under reference conditions) |
| Alarm Function | “OVER” is shown when input is out of range |
| Maximum Hold | Holds the maximum value, with decay <1 dB/3 minutes |
| Auto Power Off | Meter automatically shuts down after approx. 15 minutes of inactivity |
| Power Supply | One 9V battery, 006P or IEC 6F22 or NEDA 1604 |
| Power Life | About 50 hours (alkaline battery) |
| Operation Temperature | 0 to 40°C (32 to 104°F) |
| Operating Humidity | 10 to 90% RH |
| Storage Temperature | -10 to 60°C (14 to 140°F) |
| Storage Humidity | 10 to 75% RH |
| Dimensions/Weight | 210(L) x 55(W) x 32(H) mm / 230 g |
Buying guide: Read our sound level meter buyer’s guide.
Questions about the MSL-761 sound level meter
Should I use A or C weighting on the MSL-761?
Use A weighting on the MSL-761 for noise as people hear it, such as workplace and environmental noise, and C weighting for machinery and other low-frequency noise. Both weightings are on the same meter.
When should I use FAST or SLOW response on the MSL-761?
Use FAST (125 ms) on the MSL-761 for noise that changes quickly and SLOW (1 s) for steady or slowly fluctuating noise, where it gives a steadier reading. The display updates every 0.5 s.
Which level range should I select on the MSL-761?
The MSL-761 has two level ranges, Lo for 30–100 dB and Hi for 60–130 dB; if OVER appears on the display, switch to the other range. MAX hold keeps the highest reading, with a decay of less than 1 dB in 3 minutes.
Case study: quick noise checks in workplaces and buildings
Facility managers and safety staff often need a fast answer to whether an area is noisy enough to need hearing protection or further investigation.
A Type 2 sound level meter measures sound pressure from 30 to 130 dB. A-weighting follows human hearing for workplace and environmental noise, while C-weighting is used for machinery and low-frequency noise. FAST response follows quickly changing sounds, and SLOW smooths steady levels.
In a typical walk-through, the user selects A-weighting and SLOW response, measures at working positions, and uses MAX hold to capture peaks from machines or alarms. Areas with high readings are then flagged for a full noise assessment or controls.
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