Uni-T UT353BT Mini Sound Level Meter

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UT353BT mini digital sound level meters can convert ambient sound into electric signals, process data and display results on LCD.


UT353BT Mini Sound Level Meter 

They can constantly monitor ambient sound. UT353BT can transfer measurement data through Bluetooth to UNI-T’s custom mobile APP (iENV) for further analysis, storage, and export. iENV can be downloaded from Google Play, Apple Store or UNI-T’s website by searching ‘iENV’.

Featuring a wide dynamic range from 30 to 130dB, it can measure both A weightings to get the right response for the human ear and can have fast or slow responses to get an ambient reading or a short noise. Includes data hold and min/max functions, it is designed to conveniently fit in your hand.

Application includes noise detection, quality control, health control, environmental noise measurement in a factory, traffic, home audio and other places.


  • White backlight, clear LCD screen
  • Adjustable sampling rate, fast/slow
  • 1/2 inch condenser microphone
  • Lightweight, ergonomic design, user-friendly interface
  • Bluetooth® APP
  • Overload indication OL
  • Data hold
  • LCD backlight
  • Auto power off
  • Low battery indication.

Box, English manual, Batteries, mic shield and 12 Month Warranty


Specifications UT353 BT
Noise (A-weighting) 30~130dB
Accuracy ±1.5dB
Resolution 0.1dB
Sampling rate Fast: 125ms
Slow: 1000ms
Frequency response 31.5Hz~8kHz
Overload indication OL
Data hold
LCD backlight
Auto power off
Low battery indication
General Characteristics
Power 1.5V battery (R03) x 3
Display 32mm x 26mm
Product colour Red and grey
Product net weight 116g
Product size 150mm x 52mm x 27mm
Standard accessories Batteries, windscreen
Standard individual packing Blister, English manual



UT353BT Mini Sound Level Meter English Manual