UNI-T UT353 Mini Sound Level Meter | 30–130 dBA Digital Decibel Meter – Electrica

The UNI-T UT353 Mini Sound Level Meter is a handheld digital decibel meter for checking sound levels in homes, offices, workshops, and audio setups. It measures from 30 to 130 dBA and displays readings in 0.1 dB increments on a backlit LCD. Use it to compare noise at different fan speeds, check background noise near a workstation, or see how sound levels change after servicing a machine.

The meter uses A-weighting, which adjusts the contribution of different frequencies to approximate how the human ear responds to sound. Readings are displayed in dBA. Its ½-inch condenser microphone covers a frequency response of 31.5 Hz to 8 kHz, and the foam windscreen helps reduce interference from air moving across the microphone.

Key Features

• Fast Mode: The 125 ms response follows changes in sound more quickly, which is useful when a fan or motor starts up.
• Slow Mode: The 1,000 ms response gives a steadier display when noise fluctuates and you need time to read the screen.
• MAX/MIN: View the highest or lowest reading captured during a measurement.
• Data Hold: Freeze the displayed value so you can write it down.
• Backlit LCD: Read measurements in dim rooms and workshops.
• Battery Features: Low-battery indication and automatic power-off.

Common Applications

• Workshop Equipment: Compare noise from cooling fans, motors, and bench tools at different operating speeds.
• Home and Office: Check background noise near air conditioners, exhaust fans, windows, and workstations.
• Audio Setup: Compare speaker levels at different seats or check how changing speaker placement affects the listening area.
• Maintenance Checks: Take a baseline reading for a machine and repeat it under the same conditions after maintenance.
• Classroom Demonstrations: Show how distance and room layout affect the measured level of the same sound source.

How to Take a Sound Level Reading

1. Install three 1.5 V AAA batteries and switch the meter on.
2. Select Fast to follow changes in sound or Slow for a steadier display.
3. Point the microphone toward the sound source and keep your hand clear of the microphone.
4. Read the live value, press HOLD to freeze it, or use MAX/MIN to view the highest or lowest reading.
5. For a before-and-after comparison, keep the microphone position, angle, and response setting the same.

For example, if you are comparing two fan speeds, mark where you hold the meter and use that position for both readings. Check the room’s background noise first, then measure each speed after the fan has settled. Using the same distance and angle makes it easier to judge how much the reading changes with speed.

Technical Specifications

• Brand: UNI-T
• Model: UT353
• Product Type: Handheld digital sound level meter
• Measurement Range: 30–130 dBA
• Accuracy: ±1.5 dB
• Display Resolution: 0.1 dB
• Frequency Weighting: A-weighting
• Frequency Response: 31.5 Hz–8 kHz
• Microphone: ½-inch condenser microphone
• Time Response: Fast 125 ms and Slow 1,000 ms
• Display: 32 × 26 mm backlit LCD
• Overload Indication: OL
• Power Supply: 3 × 1.5 V AAA (R03) batteries
• Meter Dimensions: 150 × 52 × 27 mm
• Meter Net Weight: 116 g

Package Contents

• 1 × UNI-T UT353 Mini Sound Level Meter
• 1 × Foam microphone windscreen
• 3 × 1.5 V AAA batteries
• 1 × English user manual

Frequently Asked Questions

What does 0.1 dB resolution mean?
The display shows readings to one decimal place. The manufacturer specifies measurement accuracy separately at ±1.5 dB.

Which mode should I use for steady fan noise?
Start with Slow mode for a steadier reading. Select Fast mode to follow changes during startup or speed adjustments.

Does the UNI-T UT353 have Bluetooth?
The UT353 is a standalone handheld meter. Bluetooth and mobile app connectivity are features of the UT353BT model.

Order the UNI-T UT353 Mini Sound Level Meter from Electrica in Pakistan for everyday sound checks, equipment comparisons, and audio setup.

Official UNI-T UT353 specifications

• View the official UNI-T UT353 specifications for detailed product information.

Browse more multimeters and testers from Electrica

• https://electrica.com.pk/product-category/testing-measuring-instruments/