DSL-331 Digital Sound Level meter Data Logger

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  • DSL-331 Digital Sound Level meter Data Logger
  • DSL-331 Digital Sound Level meter Data Logger
  • DSL-331 Digital Sound Level meter Data Logger
  • DSL-331 Digital Sound Level meter Data Logger
  • DSL-331 Digital Sound Level meter Data Logger
  • DSL-331 Digital Sound Level meter Data Logger


A sound levelmeter is a measuring instrument used to assess noise or sound levels by measuring sound pressure. Often referred to as a sound pressure level (SPL) meter, decibel (dB) meter, noise meter or noise dosimeter, a sound level meter uses a microphone to capture sound.

DSL-331 from Tecpel is a handheld sound level meter used to take acoustic measurements.

DSL-331 from Tecpel comes with the following properties:

  • Auto Ranging Measurement 30dB to 130dB.  
  • Work with Windows Software.  
  • Bar graph Indication with Back Light.     
  •  RS-232 Real Time Display Software for Windows 95/98/2000 Windowss 7.    
  •  Frequency Weighting: A, C.
  •  4-Digit Display with updated cycle 0.5s.
  •  Resolution: 0.1dB resolution.
  •  Max/Min holds Function.
  •  The standard Fast and Slow Time weightings.  
  •  AC/DC signal output.  
  •  Overload condition indication.  
  •  Auxiliary output jack.
  •  IEC 651 type II, ANSI S1.4 Type2.
  • Calibration Potentiometer easy to adjust.
  • Back screw hole tripod connection.
  • External Power DC 9V input.
  • Calibration Potentiometer easy to adjust.
  • 32,000 Records Data Logger.  

Product Specifications



  • Standard Applied

IEC651 Type 2, ANSI S1.4 Type 2.

  • Frequency Range

31.5Hz ~ 8KHz.

  • Measuring Level Range

30 ~ 130dB.

  • Frequency Weighting


  • Microphone

1/2 inch electric condenser microphone.

  • Display

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.

  • Accuracy

±1.5dB (under reference condition at 94dB 1KHz).

  • Measuring Level Range

30 ~ 130dB.

  • 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.

  • MAX/MIN Hold

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.

  • Weight

10 oz (285g).

  • Accessories:

9V battery, Carrying case, calibration screwdriver, 3.5Ø plug, windscreen and owner’s manual.

Brand 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. Some of their products have been branded by famous leaders in the market. About 60% of their customers are repeat customers. Tecpel imports products from Japan and carries out quality checks. Their products are exported to Europe mainly. If customers find a fault with the product, they will replace it with a new product within 2-3 days.

They are regarded as one of the leading Taiwanese manufactures of high quality test and measurements. Their product lines include power supplies, oscilloscopes, electronics & electrical meters and testers. Tecpel’s quality products have been accepted by some well-known international customers. The confidence they have in their products is reflected in their one-year warranty and by their flat-rate service policy through 3-5 years.

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Warranty Information

One-Year Warranty
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