BK Precision® Class 2 Sound Level Meter

Accurately Assesses Your Environment's Noise Levels


What's special about this sound level measurement tool?

  • Measures the sound pressure of an area within 1 dB, providing a precise survey of your environment's noise level.
  • Meets IEC 60942 Class 2 sound level meter tolerance standards, ensuring accurate results every time
  • RS-232 interface and included software for  automatic data logging, eliminating the stress of manual record keeping.
  • Measuring from  30 dB - 130 dB, the unit is ideal for many applications from quiet home or office environments to packed stadiums.
  • Click for More Features

BK Precision's 735 Sound Level Meter is a useful tool for technicians needing an accurate, cost-effective instrument that can measure noise pollution, or for the hobbyist or homeowner looking to optimize home noise levels. It’s simple layout makes setup fast and easy, and Windows™ RS-232 software and is included for quick data logging in the field.

Please Note: This product ships in 2 weeks

Part # Description Class Range Weight Price
BK-735 BK Precision 735 Sound Level Meter 2 30 dB – 130 dB 1 lb
  • Backlit LCD screen for taking measurements in dark areas.
  • Measures instantaneous, minimum, and maximum sound levels at once,  providing a comprehensive evaluation of your area’s decibel level.
  • Auto Power-off features conserves battery power, saving money on replacement batteries.


What's included:

  • 735 Sound Level Meter
  • RS-232 Software (Not Compatible with 64-bit Windows Operating Systems)
  • RS-232 Connector Cable
  • AC Power Adapter


Standards Applied IEC651 Type 2, ANSI S1.4 Type 2
Frequency Range 31.5Hz - 8KHz
Measuring Level Range 30 dB - 130 dB
Frequency Weighting A / C
Microphone 1/2 Inch Electret Condenser Microphone
Display LCD
Digital Display 4 digits
0.1 dB Resolution
0.5 sec Display Update
Analog Display 50 Segment Bargraph
1 db Resolution
50ms Display Update
Time Weighting 125ms (Fast), 1 Second (Slow)
Level Ranges Lo: 30 – 80 dB
Med: 50 – 100 dB
Hi: 80 – 130 dB
Auto: 30 – 130 dB
Accuracy ±1.5 dB (under reference conditions @ 94dB, 1KHz
Dynamic Range 100 dB
DC Output 10mV / dB, output impedance approximately 1k ohm
Operating Temperature 32°F to 104° (0°C to 40°C)
Operating Humidity 10% to 90% Relative Humidity
Storage Temperature 14°F to 140°F (10°C to 60°C)
Storage Humidity 10% to 75% Relative Humidity
Power Supply 9V Battery
Battery Life About 50hrs
AC Adapter 9V DC
center pin negative
(8-15 V DC Max)
Supply current > 30mADC
Dimensions 10.8" L x 2.5" W x 1.2" H (275mm x 64mm x 30mm)
Weight, with Battery Installed 10oz (285g)


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