Decibel Meter 30 to 130 dB DSL-331

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285.00 Grams
Minimum Purchase:
1 unit


TECPEL Sound Level meter Data logger USB Recorder - DSL-331

Bar graph Indication, 4-Digit Display, AC/DC Signal output


The Tecpel DSL-331 sound level meter data loggers is programmable and comes with a tripod connection at the rear through a screw hole. Its frequency ranges are 31.5 Hz to 8 KHz, and its voltage supply ranges from 9 V DC to 130 dB. This device is used for long-term measuring and recording of acoustic levels for environmental impact studies, activity detection and recording, safe working conditions monitoring, and activity detection and recording. It offers automatic ranging measurement, works with Windows software, has a 32,000-record data recorder capacity, backlit bar graph indication, and an optional USB interface. Additionally, the device has A and C frequency weighting options as well as RS-232 real-time display software for Windows operating systems. A four-digit display with a 0.5s update cycle, 0.1dB resolution, max/min hold function, standard fast and slow time weightings, AC/DC signal output, overload situation alert, and an auxiliary output connector are among the additional features. The DSL-331 complies with ANSI S1.4 Type 2 and IEC 651 Type II requirements and is calibrated using an easy-to-adjust potentiometer.

This sound level meter provides:

  • 31.5Hz ~ 8KHz Frequency range
  • 30 ~ 130dB Measuring level range
  • Frequency Weighting A/C
  • Microphone 1/2 inch electric condenser microphone Display
  • LCD Back Light Function
  • Digital Display 4 digits
  • 0.1dB Resolution
  • 0.5 sec Display update
  • Power Requirement: One piece 9V battery NEDA 1604


There are limitations in temperature and humidity in which DSL-331 sound level meter is used:

  • Storage humidity: 10 to 75%RH
  • Ambient temperature: 0 … 40°C
  • Ambient humidity: 10 to 90%RH


Do you want to know more about this product to have better choice? read the article Sound Level Meter (How It Works, Classes, Differences And Applications) in dubai sensor blog.

Series Information

Tecpel Co. Ltd. has over 20 years of experience in the Test and Measurement market. They have set up over 50 country distributors worldwide. Their products are exported to Europe mainly. The confidence they have in their products is reflected in their one-year warranty.

Their product lines include power supplies, oscilloscopes, electronics & electrical meters and testers, Thermometer, sound level meters, etc.

About Tecpel Sound Level Meter:

Sound level meter, data logger, digital

Tecpel is regarded as one of the leading Taiwanese manufactures of high quality test and measurements, which provide different types of sound level meter:

  • DSL-1406H, TR-SLT1A4: Sound Level Transmitter with Visual Alarm LED Monitor Display
  • DSL-330A, DSL-1406: Sound Level Meter LED Monitor Display
  • DSL-331: Sound Level meter Data logger USB Recorder
  • DSL-330C: Digital Sound Level Meter
  • DSL-330: Sound Level Meter IEC651 Type 2, ANSI S1.4 Type 2
  • DSL-332: Sound Level Meters Resolution 0.1dB, Accuracy ±1.5dB.
  • DSL-336A: Sound Level Calibrator
  • DSL-330A: Sound Level Meter Auto Power Off Disable for continuing dB measurement of environment.
  • DSL-333: Sound Level Meter
  • DSL-335: Sound Level Meter
  • ST-107: Integrating Sound Level Meter


You may be interested to see this product's catalog. If so, please click to view the DSL-331 datasheet.
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Warranty Information

One Year Warranty
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Additional Information

Standard Applied:
IEC651 Type 2, ANSI S1.4 Type 2.
Frequency Range:
31.5Hz ~ 8KHz.
Measuring Level Range:
30 ~ 130dB.
Frequency Weighting:
1/2 inch electric condenser microphone.
LCD Back Light Function.
Digital Display:
4 digits, Resolution: 0.1dB; Display Update: 0.5 sec.
Analog Display:
50 segment Bar graph, Resolution, Resolution: 1dB, Display update: 50mS
Time weighting:
Fast (125ms); Slow (1 sec).
Level Range:
Lo: 30~80dB; Med: 50~100dB, Hi: 80~ 130dB; Auto Range: 30~ 130 dB.
±1.5dB (under reference condition at 94dB 1KHz).
Dynamic range:
Over and Under range Indication Function:
"OVER" is displayed, while input is more than upper limit of range. ; " UNDER" is displayed, while input is less than lower limit of range.
Hold Reading the Maximum and Minimum Value.
AC Output:
1V RMS at FS (Full Scale).
Output impedance:
Approx. 100 Ω.
DC Output:
10mV/dB, Output impedance approx. 1K Ω
Auto Power Off:
30 minutes if no operation.
Power Requirement:
One piece 9V battery NEDA 1604.
Power Life:
About 50 Hours (Alkaline battery).
AC Adapter (option):
Voltage 9VDC (8~ 15 V DC Max); Supply current : > 30mADC.
Operation Temperature:
0 to 40 ºC (32 to 104 ºF).
Operation Humidity:
10 to 90% RH.
Storage Humidity:
10 to 75% RH.
10 oz (285g).
9V battery, Carrying case, calibration screwdriver, 3.5Ø plug, windscreen and owner’s manual.
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